Publications

PhD

My PhD thesis is available here.

2026

  • [DOI] C. Barrier, T. {La-Piana}, N. Barrier, C. Lett, L. Garavelli, M. Garrido, V. Pasqualini, and E. D. H. Durieux, « Multiscale modelling of dispersal pathways for the invasive blue crab larvae (Callinectes sapidus) in the Mediterranean Sea, » Biological invasions, vol. 28, iss. 3, p. 61, 2026.
    [Bibtex] 
    @article{barrierMultiscaleModellingDispersal2026,
title = {Multiscale Modelling of Dispersal Pathways for the Invasive Blue Crab Larvae ({{Callinectes}} Sapidus) in the {{Mediterranean Sea}}},
author = {Barrier, C. and {La-Piana}, T. and Barrier, N. and Lett, C. and Garavelli, L. and Garrido, M. and Pasqualini, V. and Durieux, E. D. H.},
year = 2026,
month = feb,
journal = {Biological Invasions},
volume = {28},
number = {3},
pages = {61},
issn = {1573-1464},
doi = {10.1007/s10530-026-03781-y},
urldate = {2026-03-20},
abstract = {The blue crab (Callinectes sapidus) is an invasive species present in the Mediterranean Sea since the mid-twentieth century, which has undergone a significant population increase in the last decade. This demographic explosion raises urgent concerns, necessitating detailed information on its dispersal dynamics at multiple scales. To investigate the dispersal pathways and connectivity patterns of C. sapidus, we conducted a biophysical modelling study over an eleven-year period (2010--2020), combining a Lagrangian particle-tracking tool with two hydrodynamic models of contrasting resolutions: a basin-scale model (MedMFC,\,\textasciitilde\,4~km) and a high-resolution regional model (MARS3D, 1.2~km). By analyzing the path-use density of millions of simulated larvae, we identified major links connecting distant sub-basins, while highlighting the critical role of high-resolution modelling in resolving coastal retention features. An ensemble analysis of larval fate revealed strong spatial heterogeneity: while distant settlement drives recruitment in sink areas such as the Ligurian Sea and Eastern Corsica, local retention is the dominant mechanism in semi-enclosed environments such as the Gulf of Lion, the Gulf of Gab\`es and the Adriatic Sea, particularly during the summer spawning season. Connectivity matrices identified robust regional clusters, notably linking Tunisia, Sicily, Sardinia, and the Tyrrhenian coast, suggesting that islands act as critical stepping stones in the colonization process. These findings provide a quantitative baseline of larval exchange networks, highlighting key areas for future investigation to support the development of operational tools for management strategies.},
langid = {english},
keywords = {Callinectes sapidus,Invasive species,Lagrangian model,Larval dispersal,Marine connectivity},
file = {/home/BARRIER/Zotero/storage/J7X6DVDR/Barrier et al. - 2026 - Multiscale modelling of dispersal pathways for the invasive blue crab larvae (Callinectes sapidus) i.pdf}
}
  • [DOI] L. Dalaut, N. Barrier, M. Lengaigne, and O. Maury, « How contrasted environments in the Humboldt Current System, Pacific Warm Pool and South Pacific Gyre, shape contrasted ecosystems. A modelling approach using APECOSM, » Progress in oceanography, vol. 240, p. 103615, 2026.
    [Bibtex] 
    @article{dalautHowContrastedEnvironments2026,
title = {How Contrasted Environments in the {{Humboldt Current System}}, {{Pacific Warm Pool}} and {{South Pacific Gyre}}, Shape Contrasted Ecosystems. {{A}} Modelling Approach Using {{APECOSM}}},
author = {Dalaut, Laureline and Barrier, Nicolas and Lengaigne, Matthieu and Maury, Olivier},
year = 2026,
month = jan,
journal = {Progress in Oceanography},
volume = {240},
pages = {103615},
issn = {0079-6611},
doi = {10.1016/j.pocean.2025.103615},
urldate = {2026-03-20},
abstract = {Pelagic ecosystems exhibit a strong regional heterogeneity, driven by physical and biogeochemical characteristics. Using the global 3D marine ecosystem model APECOSM, we simulate six high-trophic-level communities, capturing their size structure, spatial distribution, and trophic interactions up to 1,000 metres depth. We examine how different environments shape their contrasting organisation and interactions in three Pacific Ocean regions: the productive Humboldt Current System, the oligotrophic South Pacific Gyre, and the thermally stratified Pacific Warm Pool. Simulations reveal strong regional contrasts in ecosystem responses. In the Humboldt, high primary production supports important biomass of small coastal pelagic fish. Seasonal warming enables tuna to forage in these productive waters, while low-oxygen conditions restrict the vertical range and abundance of mesopelagic organisms and concentrate epipelagic organisms close to the surface. In the Warm Pool, apex predators remain abundant despite low primary production, thanks to efficient trophic transfer and biomass import from neighbouring regions. Seamounts concentrate mesopelagic organisms into shallow layers, making them accessible to epipelagic predators. In contrast, the South Pacific Gyre supports sparse, imported high-trophic-levels with limited trophic coupling and strong intra-community predation. We quantify regional differences in trophic transfer efficiency and network complexity, identifying thresholds below which high-trophic-levels collapse. These findings illustrate the emergent plasticity of pelagic ecosystems and the importance of bottom-up control of high-trophic-level biomass. They emphasise the importance of temperature, transport, light and oxygen in modulating horizontal and vertical distributions, controlling the co-occurrence of predators and prey, and influencing the formation of schools, ultimately impacting trophic interactions and community assemblages.},
keywords = {APECOSM,Ecosystem function,Ecosystem structure,Humbold Current System,Mechanistic ecosystem model,Pacific Warm Pool,Pelagic ecosystem,South Pacific Gyre,Trophic interactions},
file = {/home/BARRIER/Zotero/storage/K6EY78T6/Dalaut et al. - 2026 - How contrasted environments in the Humboldt Current System, Pacific Warm Pool and South Pacific Gyre.pdf;/home/BARRIER/Zotero/storage/GMH6MFYM/S0079661125002034.html;/home/BARRIER/Zotero/storage/S23HTFUD/S0079661125002034.html}
}
  • [DOI] S. Ditkovsky, L. Resplandy, L. Dalaut, N. Barrier, M. Lengaigne, and O. Maury, « Sensitivity of fish diel vertical migration depths to future changes in the Pacific Ocean oxygen minimum zone, » Frontiers in marine science, vol. 12, 2026.
    [Bibtex] 
    @article{ditkovskySensitivityFishDiel2026,
title = {Sensitivity of Fish Diel Vertical Migration Depths to Future Changes in the {{Pacific Ocean}} Oxygen Minimum Zone},
author = {Ditkovsky, Sam and Resplandy, Laure and Dalaut, Laureline and Barrier, Nicolas and Lengaigne, Matthieu and Maury, Olivier},
year = 2026,
month = jan,
journal = {Frontiers in Marine Science},
volume = {12},
publisher = {Frontiers},
issn = {2296-7745},
doi = {10.3389/fmars.2025.1716557},
urldate = {2026-03-20},
abstract = {Diel vertical migrations in the ocean play a key role in predator-prey dynamics and the functioning of the biological carbon pump. However, changes in ocean conditions including warming and deoxygenation threaten to significantly perturb vertical migration patterns over the twenty-first century. Specifically, vertical migrations over regions of critically low oxygen, known as oxygen minimum zones (OMZs), are likely to be most sensitive to changes in temperature and oxygen. In this study, we apply a simplified prognostic ecosystem model (APECOSM-1D) to changing conditions in the Pacific Ocean OMZ as simulated by 13 Earth System Models from the Coupled Model Intercomparison Project Phase 6 (CMIP6). We find that modeled fish migration depths at a given location in the region may deepen or shoal by over 100 m by the end of the century; however, there are large uncertainties across the CMIP6 ensemble for the geographic pattern of migration depth changes. To reconcile this, we adopt a water mass based approach which aggregates changes into regions defined by their vertical oxygen minimum value. In this framework, we find that fish migration depths over the lowest oxygen core of the OMZ remain stable due to compensating changes in temperature and oxygen. Meanwhile, away from the OMZ core, ocean warming and deoxygenation together drive shallower migration depths in projected conditions.},
langid = {english},
keywords = {CMIP6,diel vertical migration,hypoxia tolerance,oxygen minimum zone,water masses},
file = {/home/BARRIER/Zotero/storage/ENGTY7TX/Ditkovsky et al. - 2026 - Sensitivity of fish diel vertical migration depths to future changes in the Pacific Ocean oxygen min.pdf}
}
  • [DOI] A. Tidd, M. T. Tolotti, P. Guillotreau, N. Barrier, and L. Dagorn, « Balancing fishing effort along the tropical tuna abundance-size spectrum, » Ecological modelling, vol. 514, p. 111495, 2026.
    [Bibtex] 
    @article{tiddBalancingFishingEffort2026,
title = {Balancing Fishing Effort along the Tropical Tuna Abundance-Size Spectrum},
author = {Tidd, Alex and Tolotti, Mariana Travassos and Guillotreau, Patrice and Barrier, Nicolas and Dagorn, Laurent},
year = 2026,
month = apr,
journal = {Ecological Modelling},
volume = {514},
pages = {111495},
issn = {0304-3800},
doi = {10.1016/j.ecolmodel.2026.111495},
urldate = {2026-03-20},
abstract = {The ecosystem approach to fisheries is widely recognised as a key management goal, yet its definition and implementation remain debated. Most fisheries management relies on single-species strategies with technical measures to reduce bycatch. However, selective removals disrupt species composition, affecting ecosystem dynamics and resilience. We present a proof-of-concept model based on balanced harvesting that allocates fishing pressure proportionally across three tuna stocks---yellowfin (Thunnus albacares), skipjack (Katsuwonus pelamis), and bigeye tuna (Thunnus obesus)---in the Indian Ocean according to their size-biomass ratios. The model optimises fishing effort by gear using a predefined objective function based on length-based population dynamics, ensuring a balanced harvest while maintaining each tuna species' biomass within its maximum sustainable yield (BMSY) limit. By assigning fishing mortality (F-multiplier) to each fleet, the model aims to maintain, within the bounds of BMSY for each stock, the ecosystem structure (based on size-abundance relationships) over a 20-year simulation. Results indicate significant reductions in fishing mortality across gears relative to 2020 levels. While some gears, such as purse seine free-school, show increased catches and revenues (146\%), others, like purse seine log-school, experience declines (-22\%). Overall, fishing at BMSY improves total revenues and catches by 51\% and 34\%, respectively, compared to 2020. This work demonstrates that it is possible to maintain each tuna stock within BMSY bounds by managing fishing fleets while preserving ecosystem structure, a significant goal of the ecosystem approach to fisheries.},
keywords = {Balanced harvest,Fishing fleets,Fleet-based management,Indian ocean,Sustainability,Tunas},
file = {/home/BARRIER/Zotero/storage/MM7RW8WY/Tidd et al. - 2026 - Balancing fishing effort along the tropical tuna abundance-size spectrum.pdf;/home/BARRIER/Zotero/storage/X8UW85AD/S0304380026000232.html}
}

2025

  • [DOI] N. Barrier, O. Maury, R. Seferian, Y. {Santana-Falcón}, A. Tidd, and M. Lengaigne, « Assessing the Time of Emergence of Marine Ecosystems From Global to Local Scales Using IPSL-CM6A-LR/APECOSM Climate-To-Fish Ensemble Simulations, » Earth’s future, vol. 13, iss. 2, p. e2024EF004736, 2025.
    [Bibtex] 
    @article{barrierAssessingTimeEmergence2025,
title = {Assessing the {{Time}} of {{Emergence}} of {{Marine Ecosystems From Global}} to {{Local Scales Using IPSL-CM6A-LR}}/{{APECOSM Climate-To-Fish Ensemble Simulations}}},
author = {Barrier, Nicolas and Maury, Olivier and Seferian, Roland and {Santana-Falc{\'o}n}, Yeray and Tidd, Alex and Lengaigne, Matthieu},
year = 2025,
journal = {Earth's Future},
volume = {13},
number = {2},
pages = {e2024EF004736},
issn = {2328-4277},
doi = {10.1029/2024EF004736},
urldate = {2026-03-20},
abstract = {Climate change is anticipated to considerably reduce global marine fish biomass, driving marine ecosystems into unprecedented states with no historical analogs. The Time of Emergence (ToE) marks the pivotal moment when climate conditions (i.e., signal) deviate from pre-industrial norms (i.e., noise). Leveraging ensemble climate-to-fish simulations from one Earth System Model (IPSL-CM6A-LR) and one Marine Ecosystem Model (APECOSM), this study examines the ToE of epipelagic, migratory and mesopelagic fish biomass alongside their main environmental drivers for two contrasted climate-change scenarios. Globally averaged biomass signals emerge over the historical period. Epipelagic biomass decline emerged earlier (1950) than mesozooplankton decline (2017) due to a stronger signal in the early 20th century, possibly related to trophic amplification induced by an early emerging surface warming (1915). Trophic amplification is delayed for mesopelagic biomass due to postponed warming in the mesopelagic zone, resulting in a later emergence (2017). ToE also displays strong size class dependence, with epipelagic medium sizes (20 cm) experiencing delayed emergence compared to the largest (1 m) and smallest (1 cm) categories. For the epipelagic and mesopelagic communities, the regional signal emergence lags behind the global average, with median ToE estimates of 2030 and 2034, respectively. This is due to stronger noise in regional time-series than in global averages. The regional ToEs are also spatially heterogeneous, driven predominantly by the signal pattern akin to mesozooplankton. Additionally, our findings underscore that mitigation efforts (i.e., transitioning from SSP5-8.5 to SSP1-2.6 scenario) can potentially curtail emerging ocean surface signals by 30\%.},
copyright = {\copyright{} 2025. The Author(s).},
langid = {english},
keywords = {climate change,ecosystem modeling,ensemble modeling,marine ecosystem,time of emergence},
file = {/home/BARRIER/Zotero/storage/2K3ULPQN/Barrier et al. - 2025 - Assessing the Time of Emergence of Marine Ecosystems From Global to Local Scales Using IPSL-CM6A-LR.pdf;/home/BARRIER/Zotero/storage/X2F3E2LM/2024EF004736.html}
}
  • [DOI] C. Barrier, T. Beneteau, M. -C. Raffalli, N. Barrier, C. Lett, V. Pasqualini, and E. D. H. Durieux, « Larval dispersal dynamics of \emphMaja\emph Squinado in the Northwestern Mediterranean: a biophysical modeling approach, » Estuarine, coastal and shelf science, vol. 316, p. 109183, 2025.
    [Bibtex] 
    @article{barrierLarvalDispersalDynamics2025,
title = {Larval Dispersal Dynamics of {{{\emph{Maja}}}}{\emph{ Squinado}} in the {{Northwestern Mediterranean}}: A Biophysical Modeling Approach},
shorttitle = {Larval Dispersal Dynamics of {{{\emph{Maja}}}}{\emph{ Squinado}} in the {{Northwestern Mediterranean}}},
author = {Barrier, C. and Beneteau, T. and Raffalli, M. -C. and Barrier, N. and Lett, C. and Pasqualini, V. and Durieux, E. D. H.},
year = 2025,
month = may,
journal = {Estuarine, Coastal and Shelf Science},
volume = {316},
pages = {109183},
issn = {0272-7714},
doi = {10.1016/j.ecss.2025.109183},
urldate = {2026-03-20},
abstract = {The Mediterranean spinous spider crab, Maja squinado (Herbst, 1788), is a prized crustacean exploited by Mediterranean coastal fisheries, contributing to local economies and culinary traditions. While stock declines have been reported in some regions, other areas continue to sustain fishing activities, albeit under pressure. Understanding the species' demography is therefore essential for effective future management. To investigate the larval dispersal dynamics of M. squinado in the Mediterranean, a biophysical model was developed, incorporating biological and ecological data such as larval duration and spawning habitats. The tool Ichthyop, designed to study ichthyoplankton dynamics, was employed to perform simulations spanning the period from 2010 to 2020. These simulations were analyzed in the context of global surface water warming trends, yielding maps that illustrated trajectory density, system connectivity, and variations in larval density and dispersal distance over time. The comparative analysis of various scenarios revealed the significant impact of environmental variations on larval connectivity. Specifically, the Tunisia-Sardinia-Corsica complex exhibited strong connectivity, while the Balearic Islands appeared isolated due to the species' short pelagic larval duration (PLD). The findings highlight the utility of biophysical models in hypothesizing population declines in isolated areas and underscore the necessity of employing diverse modeling approaches at multiple spatial and temporal resolutions. Kernel density estimation (KDE) maps were selected to analyze and visualize the observed simulation scenarios. The results emphasize the importance of considering these changes, particularly the synergies between environmental and biological parameters that influence larval dispersal and connectivity in this species. Such approaches could enhance future conservation and management strategies by accounting for the complex interactions driving population dynamics within the context of a changing Mediterranean ecosystem.},
keywords = {Biophysical models,Larval dispersal,Mediterranean sea,Regional connectivity},
file = {/home/BARRIER/Zotero/storage/RAV5SLMM/Barrier et al. - 2025 - Larval dispersal dynamics of Maja squinado in the Northwestern Mediterranean a biophysical m.pdf;/home/BARRIER/Zotero/storage/39KCCPAV/S0272771425000617.html;/home/BARRIER/Zotero/storage/H4D5A3D7/S0272771425000617.html}
}
  • [DOI] « Correction to « Ocean Iron Fertilization May Amplify Climate Change Pressures on Marine Animal Biomass for Limited Climate Benefit », » Global change biology, vol. 31, iss. 6, p. e70273, 2025.
    [Bibtex] 
    @article{CorrectionOceanIron2025,
title = {Correction to ``{{Ocean Iron Fertilization May Amplify Climate Change Pressures}} on {{Marine Animal Biomass}} for {{Limited Climate Benefit}}''},
year = 2025,
journal = {Global Change Biology},
volume = {31},
number = {6},
pages = {e70273},
issn = {1365-2486},
doi = {10.1111/gcb.70273},
urldate = {2026-03-20},
copyright = {\copyright{} 2025 John Wiley \& Sons Ltd.},
langid = {english},
file = {/home/BARRIER/Zotero/storage/2VIBW5KR/2025 - Correction to “Ocean Iron Fertilization May Amplify Climate Change Pressures on Marine Animal Biomas.pdf;/home/BARRIER/Zotero/storage/I2QX9IFR/gcb.html}
}
  • [DOI] L. Dalaut, N. Barrier, M. Lengaigne, J. Rault, A. Ariza, M. Belharet, A. Brunel, R. Schwamborn, M. {Travassos-Tolotti}, and O. Maury, « Which processes structure global pelagic ecosystems and control their trophic functioning? Insights from the mechanistic model APECOSM, » Progress in oceanography, vol. 235, p. 103480, 2025.
    [Bibtex] 
    @article{dalautWhichProcessesStructure2025,
title = {Which Processes Structure Global Pelagic Ecosystems and Control Their Trophic Functioning? {{Insights}} from the Mechanistic Model {{APECOSM}}},
shorttitle = {Which Processes Structure Global Pelagic Ecosystems and Control Their Trophic Functioning?},
author = {Dalaut, Laureline and Barrier, Nicolas and Lengaigne, Matthieu and Rault, Jonathan and Ariza, Alejandro and Belharet, Mokrane and Brunel, Adrien and Schwamborn, Ralf and {Travassos-Tolotti}, Mariana and Maury, Olivier},
year = 2025,
month = jul,
journal = {Progress in Oceanography},
volume = {235},
pages = {103480},
issn = {0079-6611},
doi = {10.1016/j.pocean.2025.103480},
urldate = {2025-05-21},
abstract = {Pelagic ecosystems are distributed throughout the world's seas and oceans. They are characterised by strong vertical structuring, horizontal heterogeneity and temporal variability, which pose significant challenges for modelling them on a global scale. In this paper, we use the mechanistic high trophic level model APECOSM (Apex Predators ECOSystem Model) to assess how the physical and biogeochemical environment constrains the structure and trophic functioning of pelagic ecosystems worldwide. To this end, we configure the model to represent the three-dimensional and size-structured dynamics of six generic pelagic communities: small and medium epipelagics, tropical tunas, mesopelagic feeding tunas, small coastal pelagics, mesopelagic residents and mesopelagic migrants. We analyse their emergent three-dimensional spatial structuring on a global scale. We first show that the modelled horizontal and vertical distributions are consistent with the observed data. We then analyse the role of key environmental drivers, such as temperature, light, primary production, currents and oxygen on the response of the communities. Finally, we explore the trophic functioning of pelagic ecosystems, focusing on the emergent diets of communities and their variation with organism size. This study demonstrates the ability of a mechanistic ecosystem model to represent the multidimensional structural heterogeneity of marine ecosystems globally (encompassing three-dimensional distribution, size variations, and community composition) from a small set of universal principles and well-defined hypotheses. This approach helps to understand how the various processes at stake act and interact to shape the structure of global pelagic ecosystems, and eventually elucidate the heterogeneity of their trophic functioning.},
keywords = {APECOSM,Ecosystem function,Ecosystem structure,Epipelagic communities,Global pelagic ecosystem,Mechanistic ecosystem model,Mesopelagic communities,Trophic interactions},
annotation = {WOS:001493909000001},
file = {/home/BARRIER/Zotero/storage/C5JP4NUZ/S0079661125000680.html;/home/BARRIER/Zotero/storage/GILF4FJU/S0079661125000680.html}
}
  • [DOI] R. E. Dunn, C. E. Benkwitt, O. Maury, N. Barrier, P. Carr, and N. A. J. Graham, « Island restoration to rebuild seabird populations and amplify coral reef functioning, » Conservation biology, vol. 39, iss. 1, p. e14313, 2025.
    [Bibtex] 
    @article{dunnIslandRestorationRebuild2025,
title = {Island Restoration to Rebuild Seabird Populations and Amplify Coral Reef Functioning},
author = {Dunn, Ruth E. and Benkwitt, Cassandra E. and Maury, Olivier and Barrier, Nicolas and Carr, Peter and Graham, Nicholas A. J.},
year = 2025,
journal = {Conservation Biology},
volume = {39},
number = {1},
pages = {e14313},
issn = {1523-1739},
doi = {10.1111/cobi.14313},
urldate = {2026-03-20},
abstract = {Mobile organisms like seabirds can provide important nutrient flows between ecosystems, but this connectivity has been interrupted by the degradation of island ecosystems. Island restoration (via invasive species eradications and the restoration of native vegetation) can reestablish seabird populations and their nutrient transfers between their foraging areas, breeding colonies, and adjacent nearshore habitats. Its diverse benefits are making island restoration increasingly common and scalable to larger islands and whole archipelagos. We identified the factors that influence breeding seabird abundances throughout the Chagos Archipelago in the Indian Ocean and conducted predictive modeling to estimate the abundances of seabirds that the archipelago could support under invasive predator eradication and native vegetation restoration scenarios. We explored whether the prey base exists to support restored seabird populations across the archipelago, calculated the nitrogen that restored populations of seabirds might produce via their guano, and modeled the cascading conservation gains that island restoration could provide. Restoration was predicted to increase breeding pairs of seabirds to over 280,000, and prey was predicted to be ample to support the revived seabird populations. Restored nutrient fluxes were predicted to result in increases in coral growth rates, reef fish biomasses, and parrotfish grazing and bioerosion rates. Given these potential cross-ecosystem benefits, our results support island restoration as a conservation priority that could enhance resilience to climatic change effects, such as sea-level rise and coral bleaching. We encourage the incorporation of our estimates of cross-ecosystem benefits in prioritization exercises for island restoration.},
langid = {english},
keywords = {,cross-ecosystem nutrients,ecological process,energeticos,energetics,especie invasora,habitat restoration,invasive species,nutrientes transecosistemicos,procesos ecologicos,resilience,resiliencia,restauracion de habitat,tropicos,tropics},
file = {/home/BARRIER/Zotero/storage/DFINNPHW/Dunn et al. - 2025 - Island restoration to rebuild seabird populations and amplify coral reef functioning.pdf;/home/BARRIER/Zotero/storage/WGX6SWFJ/cobi.html}
}
  • [DOI] L. Engel, L. Premathilake, N. Barrier, T. Khangaonkar, and L. Garavelli, « Larval connectivity for European green crab management in the Salish Sea and surrounding waters, » Marine ecology progress series, vol. 754, p. 77–92, 2025.
    [Bibtex] 
    @article{engelLarvalConnectivityEuropean2025,
title = {Larval Connectivity for {{European}} Green Crab Management in the {{Salish Sea}} and Surrounding Waters},
author = {Engel, Lilian and Premathilake, Lakshitha and Barrier, Nicolas and Khangaonkar, Tarang and Garavelli, Lysel},
year = 2025,
month = feb,
journal = {Marine Ecology Progress Series},
volume = {754},
pages = {77--92},
issn = {1616-1599, 0171-8630},
doi = {10.3354/meps14778},
urldate = {2026-03-20},
abstract = {The presence of invasive species is a growing concern in coastal marine ecosystems because of their adverse effects on biodiversity. The European green crab Carcinus maenas (EGC) is a...},
langid = {american},
keywords = {Biophysical modeling,Invasive species,Larval connectivity,Physical-biological interactions},
file = {/home/BARRIER/Zotero/storage/D5NX9CNX/Engel et al. - 2025 - Larval connectivity for European green crab management in the Salish Sea and surrounding waters.pdf}
}
  • [DOI] C. Luján, Y. Shin, N. Barrier, P. Leadley, and R. {Oliveros-Ramos}, « A protocol for implementing parameter sensitivity analyses in complex ecosystem models, » Ecological modelling, vol. 501, p. 110990, 2025.
    [Bibtex] 
    @article{lujanProtocolImplementingParameter2025,
title = {A Protocol for Implementing Parameter Sensitivity Analyses in Complex Ecosystem Models},
author = {Luj{\'a}n, Criscely and Shin, Yunne-Jai and Barrier, Nicolas and Leadley, Paul and {Oliveros-Ramos}, Ricardo},
year = 2025,
month = feb,
journal = {Ecological Modelling},
volume = {501},
pages = {110990},
issn = {0304-3800},
doi = {10.1016/j.ecolmodel.2024.110990},
urldate = {2026-03-20},
abstract = {Systematic analysis of uncertainty is critical for consolidating ecosystem model projections. Sensitivity analysis is an essential step in understanding model uncertainty, but there are many challenges when dealing with complex models. One of these is related to the quantification of uncertainty in model input parameters, which is especially problematic when limited data leads to the use of arbitrary fixed ranges of variation to define parameter uncertainty. We show the drawbacks of this practice and propose an alternative approach based on the parameter reliability criterion. This criterion helps to classify the model parameters according to the source of information used to estimate their values and calculate the ranges of variability for each parameter used in a sensitivity analysis. Our proposed approach presented in this protocol is illustrated by implementing a sensitivity analysis of the OSMOSE marine ecosystem modelling platform applied to the northern Peru Current ecosystem. We compare the results from the sensitivity analysis based on the parameter reliability criterion with those obtained using fixed ranges of variation. We find that using arbitrary uncertainty ranges can produce different conclusions compared to alternative approaches, such as the one based on the reliability of the parameters. The parameter reliability criterion can be helpful in situations where direct quantification of uncertainty in model inputs is not available.},
keywords = {Ecosystem models,OSMOSE model,Parameter uncertainty,Sensitivity analysis},
file = {/home/BARRIER/Zotero/storage/JZTG7BP3/Luján et al. - 2025 - A protocol for implementing parameter sensitivity analyses in complex ecosystem models.pdf;/home/BARRIER/Zotero/storage/YD2HUCDV/S0304380024003788.html}
}
  • [DOI] G. Mariani, J. Guiet, D. Bianchi, T. DeVries, N. Barrier, M. Troussellier, and D. Mouillot, « The combined impact of fisheries and climate change on future carbon sequestration by oceanic macrofauna, » Nature communications, vol. 16, iss. 1, p. 8845, 2025.
    [Bibtex] 
    @article{marianiCombinedImpactFisheries2025,
title = {The Combined Impact of Fisheries and Climate Change on Future Carbon Sequestration by Oceanic Macrofauna},
author = {Mariani, Ga{\"e}l and Guiet, J{\'e}r{\^o}me and Bianchi, Daniele and DeVries, Tim and Barrier, Nicolas and Troussellier, Marc and Mouillot, David},
year = 2025,
month = oct,
journal = {Nature Communications},
volume = {16},
number = {1},
pages = {8845},
publisher = {Nature Publishing Group},
issn = {2041-1723},
doi = {10.1038/s41467-025-64576-8},
urldate = {2026-03-20},
abstract = {Although the role of marine macrofauna in the ocean carbon cycle is increasingly understood, the cumulative impacts of fisheries and climate change on this pathway remain overlooked. Here, using a marine ecosystem model, we estimate that each degree of warming reduces macrofauna biomass and carbon export by 4.2\% and 2.46\%, respectively. Under a high emission scenario (SSP 5--8.5), this translates to a 13.5\%\,\textpm\,6.6\% decline in export by 2100, relative to the 1990s. Fishing further amplifies this reduction by up to 56.7\%\,\textpm\,16.3\%, creating a sequestration deficit of 14.6\,\textpm\,10.3 GtC by 2100. On average, a 1\% biomass loss from fishing results in a 0.8\% decline in carbon export. However, sequestration durability (\textasciitilde 600 years) remains unaffected. While measures restoring commercial macrofaunal biomass could yield carbon benefits comparable to mangrove restoration, multiple uncertainties limit their inclusion in the Nature-based Climate Solution portfolio, highlighting the need for further research.},
copyright = {2025 The Author(s)},
langid = {english},
keywords = {Carbon cycle,Ocean sciences},
file = {/home/BARRIER/Zotero/storage/B6EFQIYR/Mariani et al. - 2025 - The combined impact of fisheries and climate change on future carbon sequestration by oceanic macrof.pdf}
}
  • [DOI] G. Mariani, J. Guiet, D. Bianchi, T. DeVries, A. Durfort, N. Barrier, M. Troussellier, and D. Mouillot, « Potential conflicts between fishing and oceanic carbon sequestration in 15\% of the ocean, » One earth, vol. 8, iss. 4, p. 101245, 2025.
    [Bibtex] 
    @article{marianiPotentialConflictsFishing2025,
title = {Potential Conflicts between Fishing and Oceanic Carbon Sequestration in 15\% of the Ocean},
author = {Mariani, Ga{\"e}l and Guiet, J{\'e}r{\^o}me and Bianchi, Daniele and DeVries, Tim and Durfort, Ana{\"e}lle and Barrier, Nicolas and Troussellier, Marc and Mouillot, David},
year = 2025,
month = apr,
journal = {One Earth},
volume = {8},
number = {4},
pages = {101245},
issn = {2590-3322},
doi = {10.1016/j.oneear.2025.101245},
urldate = {2025-08-25},
abstract = {The ocean provides both socioeconomic and climate benefits, but these benefits can potentially conflict when fishing disrupts the carbon sequestration potential of marine macrofauna and disturbs carbon-rich sediments. A lack of understanding about the spatial overlap between fishing activity and key carbon sequestration areas hinders efforts to incorporate climate considerations into fisheries management. Here, we identify potentially conflicting oceanic carbon areas with pelagic (COCA-P) and bottom-trawling fisheries (COCA-BT) separately. We show that COCA-P cover 11.2\% of the ocean, with 60\% occurring in the high seas, while COCA-BT cover 3.7\% of the ocean, mainly in coastal areas where 56.4\% of global trawling catches occur. Only 1\% of COCAs overlap both fishery types, suggesting that targeted adjustments in fishing practices could mitigate conflicts. These findings provide critical insights for fisheries management, informing policies that balance food security, economic interests, and carbon sequestration in the ocean.},
keywords = {bottom-trawling fisheries,carbon export,carbon sequestration,dead carcasses,fecal pellets,marine macrofauna,oceanic carbon,pelagic fisheries,seafloor carbon stock},
file = {/home/BARRIER/Zotero/storage/C9USD5P2/Mariani et al. - 2025 - Potential conflicts between fishing and oceanic carbon sequestration in 15% of the ocean.pdf;/home/BARRIER/Zotero/storage/I89KYLTS/Mariani et al. - 2025 - Potential conflicts between fishing and oceanic carbon sequestration in 15% of the ocean.pdf;/home/BARRIER/Zotero/storage/U9KRRXJK/S2590332225000715.html;/home/BARRIER/Zotero/storage/X92N8EDS/S2590332225000715.html}
}
  • O. Maury, D. Tittensor, T. Eddy, E. Allison, T. Bahri, N. Barrier, L. Campling, W. Cheung, K. Frieler, B. Fulton, P. Guillotreau, R. Heneghan, V. Lam, D. Leclère, M. Lengaigne, H. {Lotze-Campen}, C. Novaglio, K. {Ortega-Cisneros}, J. Rault, J. Schewe, Y. Shin, H. Sloterdijk, D. Squires, R. Sumaila, A. Tidd, B. van Ruijven, and J. L. Blanchard, « The Ocean System Pathways (OSPs): a new scenario and simulation framework to investigate the future of the world fisheries, » Earth’s future, vol. 12, 2025.
    [Bibtex] 
    @article{mauryOceanSystemPathways2025,
title = {The {{Ocean System Pathways}} ({{OSPs}}): A New Scenario and Simulation Framework to Investigate the Future of the World Fisheries},
shorttitle = {The {{Ocean System Pathways}} ({{OSPs}})},
author = {Maury, Olivier and Tittensor, Derek and Eddy, Tyler and Allison, Eddie and Bahri, Tarub and Barrier, Nicolas and Campling, Liam and Cheung, William and Frieler, Katja and Fulton, Beth and Guillotreau, Patrice and Heneghan, Ryan and Lam, Vicky and Lecl{\`e}re, David and Lengaigne, Matthieu and {Lotze-Campen}, Hermann and Novaglio, Camilla and {Ortega-Cisneros}, Kelly and Rault, Jonathan and Schewe, Jacob and Shin, Yunne-Jai and Sloterdijk, Hans and Squires, Dale and Sumaila, Rashid and Tidd, Alexander and van Ruijven, Bas and Blanchard, Julia L.},
year = 2025,
journal = {Earth's Future},
volume = {12},
urldate = {2024-08-06},
abstract = {The Fisheries and Marine Ecosystems Model Intercomparison Project (FishMIP) has dedicated a decade to unravelling the future impacts of climate change on marine animal biomass. FishMIP is now preparing a new simulation protocol to assess the combined},
keywords = {climate change impact,FishMIP,marine ecosystems,marine fisheries,scenarios,SSP},
file = {/home/BARRIER/Zotero/storage/MXYA9WVF/Maury et al. - The Ocean System Pathways (OSPs) a new scenario and simulation framework to investigate the future.pdf;/home/BARRIER/Zotero/storage/XICGH3S9/Maury et al. - 2025 - The Ocean System Pathways (OSPs) A New Scenario and Simulation Framework to Investigate the Future.pdf;/home/BARRIER/Zotero/storage/Y78BSV9U/Maury et al. - 2025 - The Ocean System Pathways (OSPs) A New Scenario and Simulation Framework to Investigate the Future.pdf;/home/BARRIER/Zotero/storage/3YJ543KX/2024EF004851.html;/home/BARRIER/Zotero/storage/LQBWLTG7/2024EF004851.html}
}
  • [DOI] E. Meerhoff, V. Combes, R. Matano, N. Barrier, B. C. Franco, A. R. Piola, F. {Hernández-Vaca}, and O. Defeo, « Effects of regional oceanography and climate variability on larval connectivity of the wedge clam \emphDonax\emph Hanleyanus in South American beaches, » Estuarine, coastal and shelf science, vol. 321, p. 109346, 2025.
    [Bibtex] 
    @article{meerhoffEffectsRegionalOceanography2025,
title = {Effects of Regional Oceanography and Climate Variability on Larval Connectivity of the Wedge Clam {{{\emph{Donax}}}}{\emph{ Hanleyanus}} in {{South American}} Beaches},
author = {Meerhoff, Erika and Combes, Vincent and Matano, Ricardo and Barrier, Nicolas and Franco, Barbara C. and Piola, Alberto R. and {Hern{\'a}ndez-Vaca}, Freddy and Defeo, Omar},
year = 2025,
month = aug,
journal = {Estuarine, Coastal and Shelf Science},
volume = {321},
pages = {109346},
issn = {0272-7714},
doi = {10.1016/j.ecss.2025.109346},
urldate = {2026-03-20},
abstract = {The wedge clam, Donax hanleyanus, inhabits sandy beaches in the subtropical and temperate regions of the Atlantic coast of South America. Its distribution spans over 20 degrees of latitude from Brazil to Argentina, with the southernmost part of its range being influenced by the Rio de la Plata (RdlP) estuary, which limits the southward larval expansion. We used an individual-based model (IBM) to assess the larval connectivity patterns of the wedge clam during the period 2000--2012. The IBM combines a 3D hydrodynamic model with a biological sub-model that considers larval mortality due to low salinity ({$<$}7, and {$<$}9) and sea surface temperature range (high {$>$}30~{$^\circ$}C or low {$<$}9~{$^\circ$}C). The main larval connectivity patterns were observed near the release/recruitment areas, suggesting a high potential for self-recruitment. Based on the IBM and adult abundance data, we also identified the likely source and sink areas within this metapopulation. Source beach areas were Navegantes and Cassino in Brazil (from 26.3{$^\circ$} S to 34.34{$^\circ$}S), Arachania in Uruguay (34.56{$^\circ$}S), and Santa Teresita in Argentina (37.15{$^\circ$}S). A low probability of larval transport towards the poleward limit of the species' distribution was observed, supporting an irregular recruitment pattern typical of sink populations located at the edge of the distribution range of metapopulations. Larval mortality due to warm or cold waters did not affect connectivity patterns for this subtropical species. Southward larval transport across the RdlP estuary (from Uruguayan to Argentine beaches) only occurred for larvae released on early January 2011, concurrently with the strongest La Ni\~na year observed during the study period. In light of a changing climate, marked by potential increases in extreme La Ni\~na events and a poleward shift of atmospheric circulation patterns over the South Atlantic, we anticipate a strengthening of larval transport across the RdlP and a subsequent poleward expansion of the species' distribution range.},
keywords = {Bio-physical model,Larval connectivity,Molluscan larvae,Mortality,Southwestern South Atlantic},
file = {/home/BARRIER/Zotero/storage/DG7673DP/Meerhoff et al. - 2025 - Effects of regional oceanography and climate variability on larval connectivity of the wedge clam i.pdf;/home/BARRIER/Zotero/storage/36XVZBJT/S0272771425002240.html}
}
  • [DOI] N. Nikolic, V. Dulau, L. Hoarau, R. Pinfield, V. Estrade, N. Barrier, E. Corse, and E. Crochelet, "Integrating eDNA and Visual Surveys With Ocean Drift Models to Monitor Marine Mammals in Tropical Waters," Environmental dna, vol. 7, iss. 5, p. e70209, 2025.
    [Bibtex] 
    @article{nikolicIntegratingEDNAVisual2025,
title = {Integrating {{eDNA}} and {{Visual Surveys With Ocean Drift Models}} to {{Monitor Marine Mammals}} in {{Tropical Waters}}},
author = {Nikolic, Natacha and Dulau, Violaine and Hoarau, Ludovic and Pinfield, R{\'o}is{\'i}n and Estrade, Vanessa and Barrier, Nicolas and Corse, Emmanuel and Crochelet, Estelle},
year = 2025,
journal = {Environmental DNA},
volume = {7},
number = {5},
pages = {e70209},
issn = {2637-4943},
doi = {10.1002/edn3.70209},
urldate = {2026-03-20},
abstract = {Environmental DNA metabarcoding (eDNA) is emerging as a pivotal tool for assessing and monitoring marine biodiversity, exhibiting significant promise for the detection of marine mammals. The primary objective of this study was to evaluate various protocols for eDNA sampling of seawater from a small boat in tropical environment, under conditions devoid of cold chain storage or laboratory facilities and constrained by limited financial resources. Our focus was on optimizing the capture of eDNA and the subsequent detection of marine mammals in a replicable way. This investigation involved a comparative analysis between marine mammal detections via eDNA metabarcoding and traditional visual monitoring. Sampling was primarily conducted in close proximity to marine mammal sightings, off R\'eunion Island to evaluate the performance of eDNA detections. R\'eunion Island is located in the tropical western Indian Ocean and serves as a relevant model for this study, where long-term monitoring of cetaceans has been conducted since 2008, thereby enabling a robust comparison between visual sightings and molecular detections. Two sets of primers designed to target the hypervariable regions of mitochondrial 12S rRNA genes for vertebrates and mammals were used. Positive eDNA detections were identified in seven of the nine samples associated with visual sightings of one or more cetacean species. Marine mammal DNA was successfully amplified for three families (Balaenopteridae, Delphinidae, and Kogiidae) and found to be almost ubiquitously present for Delphinidae. Additionally, we investigated the potential influence of particle drift on the dispersal of eDNA. To better understand the spatial dynamics and persistence of eDNA in the marine environment, the Lagrangian model ICHTHYOP was used to simulate particle drift and assess how oceanographic processes might influence eDNA dispersal patterns around R\'eunion Island. Our study explores the potential of utilizing eDNA for monitoring cetaceans in tropical regions offering a valuable comparison to traditional visual surveys, and provides recommendations for further enhancements in future eDNA studies.},
copyright = {\copyright{} 2025 The Author(s). Environmental DNA published by John Wiley \& Sons Ltd.},
langid = {english},
keywords = {eDNA,marine mammals,Reunion Island,visual monitoring},
file = {/home/BARRIER/Zotero/storage/WSFB5XDR/Nikolic et al. - 2025 - Integrating eDNA and Visual Surveys With Ocean Drift Models to Monitor Marine Mammals in Tropical Wa.pdf;/home/BARRIER/Zotero/storage/82L8SJW2/edn3.html}
}
  • [DOI] L. Xing, A. Grüss, N. Barrier, J. He, and J. Tang, "Global sensitivity and uncertainty analyses of an ecosystem model for simulating food web dynamics in the Cooperation Sea, Southern Ocean," Fisheries research, vol. 285, p. 107345, 2025.
    [Bibtex] 
    @article{xingGlobalSensitivityUncertainty2025,
title = {Global Sensitivity and Uncertainty Analyses of an Ecosystem Model for Simulating Food Web Dynamics in the {{Cooperation Sea}}, {{Southern Ocean}}},
author = {Xing, Lei and Gr{\"u}ss, Arnaud and Barrier, Nicolas and He, Jianfeng and Tang, Jianye},
year = 2025,
month = may,
journal = {Fisheries Research},
volume = {285},
pages = {107345},
issn = {0165-7836},
doi = {10.1016/j.fishres.2025.107345},
urldate = {2026-03-20},
abstract = {There is growing interest in developing and using ecosystem simulation models to advise fisheries management in the Southern Ocean. However, poor understanding of the impacts of uncertainty in ecosystem model parameters slows down progress towards operational ecosystem models. To address this issue, we explored uncertainty in the parameters estimated during the calibration of an OSMOSE ecosystem model for the Cooperation Sea (``OSMOSE-CooperationSea'') and the impacts of this uncertainty. Our investigations pertained to four types of calibrated parameters: (1) Plank.access, the proportion of the biomass of background species groups available to focal species groups; (2) Bioflux, the parameter controlling the flux of migratory species group biomasses across the modelled domain boundaries; (3) Mlarval, the instantaneous larval mortality of the focal species groups; and (4) Mnatural, the additional natural mortality of the focal species groups. Results with the Morris method suggested that the community in the Cooperation Sea was most sensitive to changes in the Mlarval parameter of mesopelagic fishes. The biomasses of large-size, long-lived species such as toothfishes, Ad\'elie penguin (Pygoscelis adeliae), seals, and whales were most sensitive to the parameters specific to these species groups. By contrast, the biomasses of small-sized, short-lived species such as mesopelagic fishes and krill species were most sensitive to changes in the parameters specific to the predators of these species groups. Monte Carlo simulations indicated that community dynamics were more sensitive to the Mlarval and Mnatural parameters than to the Plank.access and Bioflux parameters. After gradually increasing the Mlarval or Mnatural parameter, the biomasses of Ad\'elie penguin, seals and whales decreased, while the biomasses of mesopelagic fishes and Antarctic krill increased. By providing a comprehensive analysis of uncertainty in the parameters estimated during the calibration process, the present study represents an important step towards an operational ecosystem model for supporting ecosystem-based management in the Cooperation Sea. The present study will serve as a valuable basis for similar ecosystem modelling efforts in the Southern Ocean.},
keywords = {Cooperation Sea,Monte Carlo simulations,Morris method,OSMOSE,Uncertainty analyses},
file = {/home/BARRIER/Zotero/storage/FPQAJE8M/Xing et al. - 2025 - Global sensitivity and uncertainty analyses of an ecosystem model for simulating food web dynamics i.pdf;/home/BARRIER/Zotero/storage/VA82SABU/S0165783625000827.html}
}

2024

  • [DOI] C. Barrier, S. Ternengo, O. El Idrissi, L. Piacentini, N. Barrier, C. Lett, V. Pasqualini, and E. D. H. Durieux, "Edible Sea urchin (\emphParacentrotus\emph Lividus) larval dispersal and connectivity modelling in the northwestern Mediterranean Sea," Journal of sea research, vol. 197, p. 102464, 2024.
    [Bibtex] 
    @article{barrierEdibleSeaUrchin2024,
title = {Edible {{Sea}} Urchin ({{{\emph{Paracentrotus}}}}{\emph{ Lividus}}) Larval Dispersal and Connectivity Modelling in the Northwestern {{Mediterranean Sea}}},
author = {Barrier, C. and Ternengo, S. and El Idrissi, O. and Piacentini, L. and Barrier, N. and Lett, C. and Pasqualini, V. and Durieux, E. D. H.},
year = 2024,
month = feb,
journal = {Journal of Sea Research},
volume = {197},
pages = {102464},
issn = {1385-1101},
doi = {10.1016/j.seares.2023.102464},
urldate = {2026-03-20},
abstract = {The edible sea urchin (Paracentrotus lividus) is of significant economic importance due to high demand for its consumption in various Mediterranean countries. This echinoderm plays a crucial ecological role by regulating the dynamics of seaweed and seagrass through its grazing behaviour. The abundance of sea urchin is variable in time and space, but it is currently potentially declining in the Mediterranean Sea, and likely to be negatively affected by global change. Therefore, gaining a more comprehensive understanding of sea urchin larval dispersal patterns over an extended period could contribute to our understanding of how their dynamics relate to population connectivity. To investigate the trajectories of larval dispersal of this sea urchin in the Northwestern Mediterranean Sea, we combined a Lagrangian model (Ichthyop) with a hydrodynamic model (MARS3D). This study covered the years 2010--2018 and aimed to quantify the connectivity between the preferred habitats of the sea urchin (seagrasses and rocky substrates). The present study explores seasonal variations in dispersal routes and habitat connectivity relationships for two spawning scenarios identified in the literature (spring and autumn). The results enable us to identify dispersal routes, and their regularity over time. They highlight a consistent connection between Sardinia, Corsica, and the coastlines of the Ligurian and Tyrrhenian Seas, indicating a lack of genetic structuring within the edible sea urchin population in this area, particularly in Corsica. The connectivity matrices confirm the observed dispersal trajectories and highlight certain areas of significant and enduring local retention over time. The results also reveal minimal seasonal variability. Conversely, interannual variability appears pronounced, particularly in relation with trends in the warming of surface waters in the Mediterranean, which seem to impact the dispersal routes taken by P. lividus larvae. Lastly, a connectivity map was created to explore spatial resource management perspectives, aiming to identify frequent connections over an extended time period and assign varying levels of intensity to them. This approach can provide guidance with regard to resource management issues for different coastal areas that can be connected by larvae.},
keywords = {Ichthyop,Lagrangian model,Larval dispersal,Marine connectivity},
file = {/home/BARRIER/Zotero/storage/LIPLWCTJ/Barrier et al. - 2024 - Edible Sea urchin (Paracentrotus lividus) larval dispersal and connectivity modelling in the.pdf}
}
  • [DOI] N. Barrier, Global fish biomass density under the IPSL-CM6-LR SSP1-2.6 climate change scenario for epipelagic, migratory and resident communities and 100 sizes ranging from 0.12cm to 1.96m [Dataset], 2024.
    [Bibtex] 
    @misc{barrierGlobalFishBiomass2024,
title = {Global Fish Biomass Density under the {{IPSL-CM6-LR SSP1-2}}.6 Climate Change Scenario for Epipelagic, Migratory and Resident Communities and 100 Sizes Ranging from 0.12cm to 1.96m [{{Dataset}}]},
author = {Barrier, Nicolas},
year = 2024,
doi = {10.17882/102964}
}
  • [DOI] N. Barrier, Global fish biomass density under the IPSL-CM6-LR SSP5-8.5 climate change scenario for epipelagic, migratory and resident communities and 100 sizes ranging from 0.12cm to 1.96m [Dataset], 2024.
    [Bibtex] 
    @misc{barrierGlobalFishBiomass2024a,
title = {Global Fish Biomass Density under the {{IPSL-CM6-LR SSP5-8}}.5 Climate Change Scenario for Epipelagic, Migratory and Resident Communities and 100 Sizes Ranging from 0.12cm to 1.96m [{{Dataset}}]},
author = {Barrier, Nicolas},
year = 2024,
doi = {10.17882/102974}
}
  • [DOI] M. Belharet, M. Lengaigne, N. Barrier, A. Brierley, X. Irigoien, R. Proud, and O. Maury, What determines the vertical structuring of pelagic ecosystems in the global ocean?, , 2024.
    [Bibtex] 
    @book{belharetWhatDeterminesVertical2024,
title = {What Determines the Vertical Structuring of Pelagic Ecosystems in the Global Ocean?},
author = {Belharet, Mokrane and Lengaigne, Matthieu and Barrier, Nicolas and Brierley, Andrew and Irigoien, Xabier and Proud, Roland and Maury, Olivier},
year = 2024,
month = jul,
doi = {10.1101/2024.07.04.602098},
abstract = {Offshore pelagic ecosystems are composed of vertically and functionally distinct epipelagic, migrant and resident mesopelagic communities. While this vertical structure plays a key role in carbon sequestration and in supporting important fisheries, there is still no consensus on the respective contribution of the environmental factors (light, oxygen) and processes controlling it at both global and regional scale. Here we combine mechanistic modelling and acoustic observations from the worldwide Malaspina scientific campaign to show that, while underwater light intensity is the primary factor controlling the vertical distribution and migration of pelagic organisms globally, oxygen plays a critical role in limiting the depth of migratory communities and the abundance of mesopelagic communities in Oxygen Minimum Zones. Furthermore, we show that a faithful reproduction of acoustic observations in some regions of the global ocean (southern Indian Ocean, western Pacific) cannot be achieved without separating migratory and resident mesopelagic communities into deep and shallow groups. By proposing a unified mechanistic model and an archetypical ecosystem structure constrained by comprehensive acoustic observations, this study provides a consistent understanding of the vertical structure and function of global pelagic ecosystems and paves the way for more reliable estimates of their climate-induced variability and change.}
}
  • [DOI] A. Dupaix, M. Lengaigne, M. Andrello, N. Barrier, L. Dagorn, Q. Gusmai, G. Viennois, and M. Capello, "Floating objects in the open ocean: Unveiling modifications of the pelagic habitat induced by forest cover change and climate variations," Global environmental change, vol. 88, p. 102917, 2024.
    [Bibtex] 
    @article{dupaixFloatingObjectsOpen2024,
title = {Floating Objects in the Open Ocean: {{Unveiling}} Modifications of the Pelagic Habitat Induced by Forest Cover Change and Climate Variations},
shorttitle = {Floating Objects in the Open Ocean},
author = {Dupaix, Ama{\"e}l and Lengaigne, Matthieu and Andrello, Marco and Barrier, Nicolas and Dagorn, Laurent and Gusmai, Quentin and Viennois, Ga{\"e}lle and Capello, Manuela},
year = 2024,
month = sep,
journal = {Global Environmental Change},
volume = {88},
pages = {102917},
issn = {0959-3780},
doi = {10.1016/j.gloenvcha.2024.102917},
urldate = {2026-03-20},
abstract = {Natural floating objects (NLOGs) are a major component of the habitat of pelagic species. Since the 1990s, the number of floating objects in the open ocean has increased greatly as a result of the introduction of drifting fish aggregating devices (DFADs) by the industrial tropical tuna purse seine vessels. These changes, and their potential impacts on the species that associate with floating objects, remain poorly understood. If the habitat modifications induced by DFADs have been recently characterized and quantified, the impact of other human activities on the number of floating objects is poorly studied. Relying on lagrangian simulations at the scale of the whole Indian Ocean, from 2000 to 2019, we assess the potential modifications of the pelagic surface habitat that could originate from forest cover change and climate variations. We develop several scenarios, based on coastal and river forest cover, precipitations and river discharge, to simulate densities of NLOGs. Our results suggest no significant increase in average NLOG densities in the ocean and highlight important regional and seasonal variations of these densities driven by both forest cover change and precipitations. These preliminary findings underscore the limited understanding of this critical element of pelagic species habitat. Therefore, there is pressing need to intensify monitoring efforts for pelagic species habitat and raise awareness about potential impacts of habitat modifications on tuna and other pelagic species.},
keywords = {Anthropogenic impacts,Drifting fish aggregating device,Lagrangian simulation,Tropical tuna},
file = {/home/BARRIER/Zotero/storage/E2D4E5S9/Dupaix et al. - 2024 - Floating objects in the open ocean Unveiling modifications of the pelagic habitat induced by forest.pdf;/home/BARRIER/Zotero/storage/KRNT3TTA/S0959378024001213.html}
}
  • [DOI] E. Giachini Tosetto, C. Lett, A. {Koch-Larrouy}, A. {Costa da Silva}, S. {Neumann-Leitão}, M. Nogueira Junior, N. Barrier, A. N. Dossa, M. Tchilibou, P. Bauchot, G. Morvan, and A. Bertrand, "Identifying community assembling zones and connectivity pathways in the Tropical Southwestern Atlantic Ocean," Ecography, vol. 2024, iss. 3, p. e07110, 2024.
    [Bibtex] 
    @article{giachinitosettoIdentifyingCommunityAssembling2024,
title = {Identifying Community Assembling Zones and Connectivity Pathways in the {{Tropical Southwestern Atlantic Ocean}}},
author = {Giachini Tosetto, Everton and Lett, Christophe and {Koch-Larrouy}, Ariane and {Costa da Silva}, Alex and {Neumann-Leit{\~a}o}, Sigrid and Nogueira Junior, Miodeli and Barrier, Nicolas and Dossa, Alina Nathanael and Tchilibou, Michel and Bauchot, Perrine and Morvan, Guillaume and Bertrand, Arnaud},
year = 2024,
journal = {Ecography},
volume = {2024},
number = {3},
pages = {e07110},
issn = {1600-0587},
doi = {10.1111/ecog.07110},
urldate = {2026-03-20},
abstract = {Dispersal is more intense in the ocean than on land because most marine taxa present planktonic life stages that are transported by currents even without specific morphological traits. Thus, species dispersal shapes the distribution of biodiversity along seascapes and drives the composition of biodiversity assemblages. To identify marine assembling zones which characterise spatial areas particularly prone to receive and retain similar animal assemblages from the regional pool of species through passive dispersal, we propose a community-based approach grounded on Lagrangian simulations of plankton dispersal. This novel approach was applied to communities (coast, outer shelf, slope, seamounts and islands; 0--80 m depth) of the Tropical Southwestern Atlantic and used to assess connectivity pathways. For that, we classified the modelled particles in 15 categories according to biological traits (planktonic life duration and spawning habitat) of representative planktonic communities. From the hierarchical clustering of the multivariate matrix containing the amount of arriving particles from each category in each cell we defined 14 assembling zones. Results highlighted that the assembling zones were mostly shaped by the degree of exposure to currents and the presence of mesoscale features (eddies, recirculation) derived from the interaction between these currents and coastlines. The boundaries, dispersal and connectivity patterns of these zones consistently align with local and regional in situ spatial distribution and abundance patterns of organisms, and provide an appropriate basis for the formulation of ecological hypotheses in the metacommunity framework to be tested in situ, such as the balance between species sorting and mass effect assembling archetypes. This approach, when coupled with the knowledge of other processes shaping communities' structure and distribution, provides important insights for regions and animal groups for which knowledge is limited or absent, and more generally allows for a comprehensive overview of the distribution of distinct communities and connectivity pathways along marine environments.},
copyright = {\copyright{} 2023 The Authors. Ecography published by John Wiley \& Sons Ltd on behalf of Nordic Society Oikos},
langid = {english},
keywords = {community assembly,landscape ecology,mass effect,metacommunity,northeastern Brazil,species sorting},
file = {/home/BARRIER/Zotero/storage/6TCKCU2Y/Giachini Tosetto et al. - 2024 - Identifying community assembling zones and connectivity pathways in the Tropical Southwestern Atlant.pdf;/home/BARRIER/Zotero/storage/QF2N8JPB/ecog.html}
}
  • [DOI] C. Luján, R. {Oliveros-Ramos}, N. Barrier, P. Leadley, and Y. Shin, "Key species and indicators revealed by an uncertainty analysis of the marine ecosystem model OSMOSE," Marine ecology progress series, vol. 741, p. 29–46, 2024.
    [Bibtex] 
    @article{lujanKeySpeciesIndicators2024,
title = {Key Species and Indicators Revealed by an Uncertainty Analysis of the Marine Ecosystem Model {{OSMOSE}}},
author = {Luj{\'a}n, Criscely and {Oliveros-Ramos}, Ricardo and Barrier, Nicolas and Leadley, Paul and Shin, Yunne-Jai},
year = 2024,
month = jul,
journal = {Marine Ecology Progress Series},
volume = {741},
pages = {29--46},
issn = {1616-1599, 0171-8630},
doi = {10.3354/meps14465},
urldate = {2026-03-20},
abstract = {Systematic analyses that examine uncertainty in models are essential for assessing their credibility. In this study, we implemented an uncertainty analysis that quantifies the effect of parameter...},
langid = {american},
keywords = {Ecosystem models,Northern Peru Current ecosystem,OSMOSE model,Parameter uncertainty,Uncertainty analysis}
}
  • [DOI] A. Morell, Y. Shin, N. Barrier, M. {Travers-Trolet}, and B. Ernande, "Realised Thermal Niches in Marine Ectotherms Are Shaped by Ontogeny and Trophic Interactions," Ecology letters, vol. 27, iss. 11, p. e70017, 2024.
    [Bibtex] 
    @article{morellRealisedThermalNiches2024,
title = {Realised {{Thermal Niches}} in {{Marine Ectotherms Are Shaped}} by {{Ontogeny}} and {{Trophic Interactions}}},
author = {Morell, Alaia and Shin, Yunne-Jai and Barrier, Nicolas and {Travers-Trolet}, Morgane and Ernande, Bruno},
year = 2024,
journal = {Ecology Letters},
volume = {27},
number = {11},
pages = {e70017},
issn = {1461-0248},
doi = {10.1111/ele.70017},
urldate = {2024-12-03},
abstract = {Understanding the response of marine organisms to temperature is crucial for predicting climate change impacts. Fundamental physiological thermal performance curves (TPCs), determined under controlled conditions, are commonly used to project future species spatial distributions or physiological performances. Yet, real-world performances may deviate due to extrinsic factors covarying with temperature (food, oxygen, etc.). Using a bioenergetic marine ecosystem model, we evaluate the differences between fundamental and realised TPCs for fish species with contrasted ecology and thermal preferences. Food limitation is the primary cause of differences, decreasing throughout ontogeny and across trophic levels due to spatio-temporal variability of low-trophic level prey availability with temperature. Deoxygenation has moderate impact, despite increasing during ontogeny. This highlights the lower sensitivity of early life stages to hypoxia, which is mechanistically explained by lower mass-specific ingestion at older stages. Understanding the emergence of realised thermal niches offers crucial insights to better determine population's persistence under climate warming.},
copyright = {\copyright{} 2024 The Author(s). Ecology Letters published by John Wiley \& Sons Ltd.},
langid = {english},
keywords = {aerobic scope,bioenergetic trophic web model,fish,food limitation,hypoxia,life stage},
file = {/home/BARRIER/Zotero/storage/EUCKBHST/Morell et al. - 2024 - Realised Thermal Niches in Marine Ectotherms Are S.pdf;/home/BARRIER/Zotero/storage/SMKHMPSV/Morell et al. - 2024 - Realised Thermal Niches in Marine Ectotherms Are Shaped by Ontogeny and Trophic Interactions.pdf;/home/BARRIER/Zotero/storage/LCCHCIKB/ele.html}
}
  • [DOI] C. Muller, C. Lett, F. Porri, P. Pattrick, D. Bailey, H. Denis, N. Barrier, W. Potts, and D. M. Kaplan, "Coastal connectivity of an abundant inshore fish species: model-data comparison along the southern coast of South Africa," Marine ecology progress series, vol. 731, p. 89–104, 2024.
    [Bibtex] 
    @article{mullerCoastalConnectivityAbundant2024,
title = {Coastal Connectivity of an Abundant Inshore Fish Species: Model-Data Comparison along the Southern Coast of {{South Africa}}},
shorttitle = {Coastal Connectivity of an Abundant Inshore Fish Species},
author = {Muller, Cuen and Lett, Christophe and Porri, Francesca and Pattrick, Paula and Bailey, Dylan and Denis, Hugo and Barrier, Nicolas and Potts, Warren and Kaplan, David M.},
year = 2024,
month = mar,
journal = {Marine Ecology Progress Series},
volume = {731},
pages = {89--104},
issn = {1616-1599, 0171-8630},
doi = {10.3354/meps14272},
urldate = {2026-03-20},
abstract = {Biophysical models are often used to estimate larval dispersal patterns for the assessment of marine metapopulation spatial structure. However, comparisons of these models with field observations...},
langid = {american},
keywords = {Diplodus capensis,Biophysical model,Larval dispersal,Population dynamics,Seabream},
file = {/home/BARRIER/Zotero/storage/H5IF35UM/Muller et al. - 2024 - Coastal connectivity of an abundant inshore fish species model-data comparison along the southern c.pdf}
}
  • [DOI] W. Podlejski, Léo. Berline, J. Jouanno, N. Barrier, and C. Lett, "Drivers of growth and decay of \emphSargassum in the Tropical Atlantic: A Lagrangian approach," Progress in oceanography, vol. 229, p. 103364, 2024.
    [Bibtex] 
    @article{podlejskiDriversGrowthDecay2024,
title = {Drivers of Growth and Decay of {{{\emph{Sargassum}}}} in the {{Tropical Atlantic}}: {{A Lagrangian}} Approach},
shorttitle = {Drivers of Growth and Decay of {{{\emph{Sargassum}}}} in the {{Tropical Atlantic}}},
author = {Podlejski, Witold and Berline, L{\'e}o and Jouanno, Julien and Barrier, Nicolas and Lett, Christophe},
year = 2024,
month = dec,
journal = {Progress in Oceanography},
volume = {229},
pages = {103364},
issn = {0079-6611},
doi = {10.1016/j.pocean.2024.103364},
urldate = {2026-03-20},
abstract = {The proliferation of Sargassum in the Tropical Atlantic has occurred almost every year since 2011, but a strong variability of biomass is observed among years. Essential knowledge about the drivers of Sargassum growth and decay is still lacking to explain this interannual variability. Benefiting from accurate basin scale Sargassum detections provided by remote sensing, and from physical and biogeochemical ocean simulations, we developed a Lagrangian drift-growth model to simulate Sargassum distribution over the period 2016--2020. The resulting trajectories and biomass time series of Sargassum aggregates were analyzed to highlight the main limiting factors of growth and decay. The nitrogen and phosphorous concentrations are found to be weakly restrictive compared to physical limiting factors, especially the temperature. In particular, the warm waters found off northern Brazil appear to be instrumental in triggering the end of seasonal growth of Sargassum. The timing of the seasonal warming of this region strongly impacts the quantities of Sargassum simulated each year. This suggests that this region should be monitored to anticipate the development of Sargassum and resulting strandings.},
keywords = {Alternative Floating Algae Index,Growth model,Lagrangian simulation,Nutrients,Time series,Tropical North atlantic},
file = {/home/BARRIER/Zotero/storage/TLJI4WX6/Podlejski et al. - 2024 - Drivers of growth and decay of Sargassum in the Tropical Atlantic A Lagrangian approach.pdf;/home/BARRIER/Zotero/storage/XK9NUU2H/S0079661124001708.html}
}
  • [DOI] R. Sun, P. Sun, H. Yu, P. Ju, S. Ma, Z. Liang, M. Heino, Y. Shin, N. Barrier, and Y. Tian, "Exploring fishing impacts on the structure and functioning of the Yellow Sea ecosystem using an individual-based modeling approach," Journal of marine systems, vol. 242, p. 103946, 2024.
    [Bibtex] 
    @article{sunExploringFishingImpacts2024,
title = {Exploring Fishing Impacts on the Structure and Functioning of the {{Yellow Sea}} Ecosystem Using an Individual-Based Modeling Approach},
author = {Sun, Runlong and Sun, Peng and Yu, Haiqing and Ju, Peilong and Ma, Shuyang and Liang, Zhenlin and Heino, Mikko and Shin, Yunne-Jai and Barrier, Nicolas and Tian, Yongjun},
year = 2024,
month = feb,
journal = {Journal of Marine Systems},
volume = {242},
pages = {103946},
issn = {0924-7963},
doi = {10.1016/j.jmarsys.2023.103946},
urldate = {2026-03-20},
abstract = {The Yellow Sea is a marginal sea in the Northwestern Pacific where the fishery resources have been overfished and the community structure has greatly changed over the past six decades. Ecosystem modeling approaches are valuable tools to uncover potential mechanisms behind the ecosystem changes. Here, we developed `OSMOSE-YS', an individual-based multi-species OSMOSE model that includes important commercial pelagic and demersal fish and invertebrates in the Yellow Sea. Simulations were carried out under three fishing scenarios to investigate how different levels of fishing pressure may have impacted the Yellow Sea ecosystem. Results indicate that the biomass of demersal fish continued to decline during 1970--2014, while the biomass of pelagic fish and invertebrates fluctuated periodically. Long-term fishing pressure has led to the reduction of total biomass, body sizes, and longevity of the modelled species. Under low-fishing condition, the ecosystem biomass is restored and the proportion of elder and larger individuals increases. On the contrary, high-fishing condition further decreases the proportion of high-trophic-level species. OSMOSE-YS serves as a baseline model to investigate ecosystem responses to different fishing strategies, in support of ecosystem-based fisheries management in the Yellow Sea.},
keywords = {Ecological indicators,Ecosystem model,Fishing effect,OSMOSE model,Over-exploitation},
file = {/home/BARRIER/Zotero/storage/AQX4TZ4C/Sun et al. - 2024 - Exploring fishing impacts on the structure and functioning of the Yellow Sea ecosystem using an indi.pdf}
}
  • [DOI] E. G. Tosetto, C. Lett, S. {Neumann-Leitão}, A. {Koch-Larrouy}, N. Barrier, A. C. {da Silva}, J. Salvetat, and A. Bertrand, "Diel vertical migration and seamount stepping stones promote species connectivity from coastal to offshore insular systems in the Tropical Southwestern Atlantic," Limnology and oceanography, vol. 69, iss. 9, p. 2071–2084, 2024.
    [Bibtex] 
    @article{tosettoDielVerticalMigration2024,
title = {Diel Vertical Migration and Seamount Stepping Stones Promote Species Connectivity from Coastal to Offshore Insular Systems in the {{Tropical Southwestern Atlantic}}},
author = {Tosetto, Everton Giachini and Lett, Christophe and {Neumann-Leit{\~a}o}, Sigrid and {Koch-Larrouy}, Ariane and Barrier, Nicolas and {da Silva}, Alex Costa and Salvetat, Julie and Bertrand, Arnaud},
year = 2024,
journal = {Limnology and Oceanography},
volume = {69},
number = {9},
pages = {2071--2084},
issn = {1939-5590},
doi = {10.1002/lno.12648},
urldate = {2026-03-20},
abstract = {The recruitment of marine species in isolated oceanic island systems can be challenged by prevailing currents, as exemplified by the Tropical Southwestern Atlantic. In this region, the Fernando de Noronha ridge hosts several seamounts, the Rocas Atoll and the Fernando de Noronha Archipelago, which are home to great marine biodiversity. However, along the ridge, the central branch of the South Equatorial Current (cSEC), flowing westward, poses a challenge to the recruitment of organisms toward Fernando de Noronha. To unveil critical insights into the intricate processes shaping biodiversity in these insular ecosystems, we use a dispersal Lagrangian tool to explore the role of diel vertical migration (DVM) to depth strata influenced by the South Equatorial Undercurrent (SEUC), which flows eastward bellow the cSEC, in shaping species dispersal and metacommunity dynamics. Our results show that while not a direct journey, the DVM into SEUC-influenced strata increases the possibility that the seamounts and the Rocas Atoll act as stepping stones between the continental shelf and Fernando de Noronha. Propagules of organisms originating primarily from the continental shelf are transported to the western seamounts of the ridge. Upon reaching the western seamounts, organisms can find suitable habitats to recruit. The progeny of these communities that migrate to SEUC-influenced strata have the opportunity to reach suitable habitats at the Rocas Atoll and the Eastern seamounts, ultimately connecting to the Fernando de Noronha archipelago. These results provide scientific fundaments for the development of a functional network of marine protected areas in the Tropical Southwestern Atlantic.},
copyright = {\copyright{} 2024 The Author(s). Limnology and Oceanography published by Wiley Periodicals LLC on behalf of Association for the Sciences of Limnology and Oceanography.},
langid = {english},
file = {/home/BARRIER/Zotero/storage/LEFJRR4W/Tosetto et al. - 2024 - Diel vertical migration and seamount stepping stones promote species connectivity from coastal to of.pdf;/home/BARRIER/Zotero/storage/MV3LQ2PM/lno.html}
}

2023

  • [DOI] N. Barrier, M. Lengaigne, J. Rault, R. Person, C. Ethé, O. Aumont, and O. Maury, "Mechanisms underlying the epipelagic ecosystem response to ENSO in the equatorial Pacific ocean," Progress in oceanography, vol. 213, p. 103002, 2023.
    [Bibtex] 
    @article{barrierMechanismsUnderlyingEpipelagic2023,
title = {Mechanisms Underlying the Epipelagic Ecosystem Response to {{ENSO}} in the Equatorial {{Pacific}} Ocean},
author = {Barrier, Nicolas and Lengaigne, Matthieu and Rault, Jonathan and Person, Renaud and Eth{\'e}, Christian and Aumont, Olivier and Maury, Olivier},
year = 2023,
month = apr,
journal = {Progress in Oceanography},
volume = {213},
pages = {103002},
issn = {0079-6611},
doi = {10.1016/j.pocean.2023.103002},
urldate = {2023-10-30},
abstract = {The El~Ni\~no/Southern Oscillation is known to strongly impact marine ecosystems and fisheries. In particular, El~Ni\~no years are characterized, among other things, by a decrease in tuna catches in the western Pacific and an increase in the central Pacific, whereas these catches accumulate in the far western Pacific during La~Ni\~na conditions. However, the processes driving this zonal shift in the tuna catch (changing habitat conditions, currents or food availability) remain unclear. Here, we use an hindcast simulation from the mechanistic ecosystem model APECOSM that reasonably reproduces the observed zonal shift of the epipelagic community in response to ENSO to understand the mechanisms underlying this shift. Although the response of modeled epipelagic communities to El~Ni\~no is relatively similar for the different size classes studied, the processes responsible for these changes vary considerably by organism size. One of the major results of our analysis is the critical role of eastward passive transport by El~Ni\~no-related surface current anomalies for all size classes. While the effects of passive transport dominate the effects of growth and predation changes for large organisms, this is not the case for intermediate-sized organisms in the western Pacific, where the decrease in biomass is first explained by increased predation and then decreased foraging success. For small organisms, changes in growth rate, induced by the influence of temperature on fish physiology, is an important process that reinforces the biomass increase induced by passive horizontal transport in the eastern Pacific and the biomass decrease induced by increased predation by intermediate-sized organisms near the dateline. Finally, contrary to what is often assumed, our model shows that active habitat-based movements are not required to explain the westward biomass shifts that are observed during ENSO. This study illustrates the relevance of using a mechanistic ecosystem model to disentangle the role of the different processes controlling biomass changes. It highlights the essential dynamic role of ocean currents in shaping the response of marine communities to climate variability and its interaction with biological (e.g. growth) and ecological (e.g. foraging and predation) processes, whose relative importance varies with organisms' size and contribute to modify the community structure.},
keywords = {Advection,APECOSM,Biomass,DEB,Ecosystem,Ecosystem modeling,El Nino,ENSO,Epipelagic,Equatorial Pacific,Fish,Growh,Habitat,La Nina,Predation},
file = {/home/BARRIER/Zotero/storage/J3Z8U5W3/Barrier et al. - 2023 - Mechanisms underlying the epipelagic ecosystem response to ENSO in the equatorial Pacific ocean.pdf;/home/BARRIER/Zotero/storage/MRWKR34T/S0079661123000459.html}
}
  • [DOI] J. {Flores-Valiente}, C. Lett, F. Colas, L. Pecquerie, A. {Aguirre-Velarde}, F. Rioual, J. Tam, A. Bertrand, P. Ayón, S. Sall, N. Barrier, and T. Brochier, "Influence of combined temperature and food availability on Peruvian anchovy (\emphEngraulis\emph Ringens) early life stages in the northern Humboldt Current system: A modelling approach," Progress in oceanography, vol. 215, p. 103034, 2023.
    [Bibtex] 
    @article{flores-valienteInfluenceCombinedTemperature2023,
title = {Influence of Combined Temperature and Food Availability on {{Peruvian}} Anchovy ({{{\emph{Engraulis}}}}{\emph{ Ringens}}) Early Life Stages in the Northern {{Humboldt Current}} System: {{A}} Modelling Approach},
shorttitle = {Influence of Combined Temperature and Food Availability on {{Peruvian}} Anchovy ({{{\emph{Engraulis}}}}{\emph{ Ringens}}) Early Life Stages in the Northern {{Humboldt Current}} System},
author = {{Flores-Valiente}, Jorge and Lett, Christophe and Colas, Fran{\c c}ois and Pecquerie, Laure and {Aguirre-Velarde}, Arturo and Rioual, Fanny and Tam, Jorge and Bertrand, Arnaud and Ay{\'o}n, Patricia and Sall, Saidou and Barrier, Nicolas and Brochier, Timoth{\'e}e},
year = 2023,
month = jul,
journal = {Progress in Oceanography},
volume = {215},
pages = {103034},
issn = {0079-6611},
doi = {10.1016/j.pocean.2023.103034},
urldate = {2026-03-20},
abstract = {In the northern Humboldt Current system (NHCS), the Peruvian anchovy (Engraulis ringens) constitutes the bulk of landings and has a significant socioeconomic contribution. Understanding the impact of environment on the early-life stages of anchovy and further population dynamics remains challenging. Climate variability at a variety of scales modulates currents velocity, temperature and food availability, impacting early-life stages drift, growth and survival. In order to investigate these impacts, we developed Ichthyop-DEB, an individual-based model including larval retention processes and a Dynamic Energy Budget (DEB) bioenergetic module for larval growth. First, we assessed the effect of hydrodynamic simulations horizontal resolution on simulated larval retention patterns using a recruitment age-criterion of 30~days. Then, we evaluated the impact of the following biological processes on simulated larval recruitment patterns: (i) a minimum size-criterion (2~cm), as opposed to a minimum age-criterion (30~days), to be considered as recruited, (ii) the upper larval thermal limit tolerance of the species, for which lab experiments are lacking, and (iii) a constant larval mortality rate. We found that using different resolutions of the hydrodynamic model (10 and 2~km) led to similar simulated larval retention patterns. Retention was highest when spawning occurred in the superficial layer (0--15~m) in austral winter and in the deepest considered layer (30--45~m) in summer. Coupling with the DEB model produced contrasted growth patterns on the continental shelf with a strong month-latitude interaction. Larval recruitment was strongest from 6{$^\circ$} to 10{$^\circ$} S in austral summer, largely contributing to the average seasonal pattern. Depending on the temperature correction function tested with the bioenergetic module, simulated larval recruitment could also be strong in the northernmost zone (2{$^\circ$}--4{$^\circ$}S), an area not known for abundant anchovy populations, which suggests a possible thermal growth limitation. Finally, sensitivity tests performed on larval growth limitation by food suggested a deficiency in food supply in the southernmost zone (18{$^\circ$}--20{$^\circ$}S).},
keywords = {Early life stages survival,Ichthyop-DEB model,Larval drift,Larval growth,Peruvian anchovy},
file = {/home/BARRIER/Zotero/storage/HUC38NXZ/Flores-Valiente et al. - 2023 - Influence of combined temperature and food availability on Peruvian anchovy (Engraulis ringensi.pdf}
}
  • [DOI] N. Henschke, B. Espinasse, C. A. Stock, X. Liu, N. Barrier, and E. A. Pakhomov, "The role of water mass advection in staging of the Southern Ocean Salpa thompsoni populations," Scientific reports, vol. 13, iss. 1, p. 7088, 2023.
    [Bibtex] 
    @article{henschkeRoleWaterMass2023,
title = {The Role of Water Mass Advection in Staging of the {{Southern Ocean Salpa}} Thompsoni Populations},
author = {Henschke, Natasha and Espinasse, Boris and Stock, Charles A. and Liu, Xiao and Barrier, Nicolas and Pakhomov, Evgeny A.},
year = 2023,
month = may,
journal = {Scientific Reports},
volume = {13},
number = {1},
pages = {7088},
publisher = {Nature Publishing Group},
issn = {2045-2322},
doi = {10.1038/s41598-023-34231-7},
urldate = {2026-03-20},
abstract = {Salpa thompsoni is an important grazer in the Southern Ocean. Their abundance in the western Antarctic Peninsula is highly variable, varying by up to 5000-fold inter-annually. Here, we use a particle-tracking model to simulate the potential dispersal of salp populations from a source location in the Antarctic Circumpolar Current (ACC) to the Palmer Long Term Ecological Research (PAL LTER) study area. Tracking simulations are run from 1998 to 2015, and compared against both a stationary salp population model simulated at the PAL LTER study area and observations from the PAL LTER program. The tracking simulation was able to recreate closely the long-term trend and the higher abundances at the slope stations. The higher abundances observed at slope stations are likely due to the advection of salp populations from a source location in the ACC, highlighting the significant role of water mass circulation in the distribution and abundance of Southern Ocean salp populations.},
copyright = {2023 The Author(s)},
langid = {english},
keywords = {Climate sciences,Ecology,Ocean sciences},
file = {/home/BARRIER/Zotero/storage/3ZYJAJ9I/Henschke et al. - 2023 - The role of water mass advection in staging of the Southern Ocean Salpa thompsoni populations.pdf}
}
  • [DOI] T. Imzilen, D. M. Kaplan, N. Barrier, and C. Lett, "Simulations of drifting fish aggregating device (dFAD) trajectories in the Atlantic and Indian Oceans," Fisheries research, vol. 264, p. 106711, 2023.
    [Bibtex] 
    @article{imzilenSimulationsDriftingFish2023,
title = {Simulations of Drifting Fish Aggregating Device ({{dFAD}}) Trajectories in the {{Atlantic}} and {{Indian Oceans}}},
author = {Imzilen, Taha and Kaplan, David M. and Barrier, Nicolas and Lett, Christophe},
year = 2023,
month = aug,
journal = {Fisheries Research},
volume = {264},
pages = {106711},
issn = {0165-7836},
doi = {10.1016/j.fishres.2023.106711},
urldate = {2026-03-20},
abstract = {Tropical tuna purse-seine fisheries deploy thousands of human-made drifting fish aggregating devices (dFADs) annually, raising a number of concerns regarding ecosystem impacts. In this study, we explored the use of a Lagrangian particle-tracking model to simulate the drift of dFADs in the Atlantic and Indian Oceans. We simulated more than 100,000 dFADs trajectories using the Lagrangian tool Ichthyop forced with velocity fields from an ocean model output (GLORYS12V1) and two satellite-derived ocean currents products (OSCAR and GEKCO). Importantly, through a collaborative agreement with the French frozen tuna producers' organization we had access to the true locations of all dFADs along their drift and could therefore evaluate the accuracy of our simulations. The accuracy was assessed by comparing the observed and simulated trajectories in terms of spatial distribution, separation distance, and a non-dimensional skill score (an index based on separation distances normalized by net displacements of dFADs). In the two oceans, simulations forced with GLORYS12V1 were more accurate than with OSCAR and GEKCO, probably due to the differences in the spatio-temporal resolution of the forcing products. When we compared multiple depths for GLORYS12V1, the model performed better at 0~m in the Indian Ocean and at 5~m in the Atlantic Ocean, which could be related to the longer vertical structure of dFADs in the Atlantic Ocean. We showed that including a windage factor did not improve the accuracy of modeled dFADs trajectories. We found that mean model-data separation distances were similar in both oceans, exceeding 100~km after 6--8 days of drift. While separation distances between simulated and observed trajectories show that model errors were similar in the two oceans, the generally longer distances traveled by dFADs in the Indian Ocean than in the Atlantic Ocean lead to considerably higher skill scores in the former than in the latter. This explains the relatively good predictive ability of the model to represent mean dFAD densities at the basin scale in both oceans, while at the same time indicates higher prediction skills for the movements of individual dFADs in the Indian Ocean than in the Atlantic Ocean.},
keywords = {Coral reefs,Fish aggregating device (FAD),Fishing debris,Lagrangian transport,Marine pollution,Ocean currents,Simulation of trajectories},
file = {/home/BARRIER/Zotero/storage/4YZBE8YK/Imzilen et al. - 2023 - Simulations of drifting fish aggregating device (dFAD) trajectories in the Atlantic and Indian Ocean.pdf}
}
  • [DOI] V. G. de Luzinais, H. du Pontavice, G. Reygondeau, N. Barrier, J. L. Blanchard, V. Bornarel, M. Büchner, W. W. L. Cheung, T. D. Eddy, J. D. Everett, J. Guiet, C. S. Harrison, O. Maury, C. Novaglio, C. M. Petrik, J. Steenbeek, D. P. Tittensor, and D. Gascuel, "Trophic amplification: A model intercomparison of climate driven changes in marine food webs," Plos one, vol. 18, iss. 8, p. e0287570, 2023.
    [Bibtex] 
    @article{luzinaisTrophicAmplificationModel2023,
title = {Trophic Amplification: {{A}} Model Intercomparison of Climate Driven Changes in Marine Food Webs},
shorttitle = {Trophic Amplification},
author = {de Luzinais, Vianney Guibourd and du Pontavice, Hubert and Reygondeau, Gabriel and Barrier, Nicolas and Blanchard, Julia L. and Bornarel, Virginie and B{\"u}chner, Matthias and Cheung, William W. L. and Eddy, Tyler D. and Everett, Jason D. and Guiet, Jerome and Harrison, Cheryl S. and Maury, Olivier and Novaglio, Camilla and Petrik, Colleen M. and Steenbeek, Jeroen and Tittensor, Derek P. and Gascuel, Didier},
year = 2023,
month = aug,
journal = {PLOS ONE},
volume = {18},
number = {8},
pages = {e0287570},
publisher = {Public Library of Science},
issn = {1932-6203},
doi = {10.1371/journal.pone.0287570},
urldate = {2023-10-30},
abstract = {Marine animal biomass is expected to decrease in the 21st century due to climate driven changes in ocean environmental conditions. Previous studies suggest that the magnitude of the decline in primary production on apex predators could be amplified through the trophodynamics of marine food webs, leading to larger decreases in the biomass of predators relative to the decrease in primary production, a mechanism called trophic amplification. We compared relative changes in producer and consumer biomass or production in the global ocean to assess the extent of trophic amplification. We used simulations from nine marine ecosystem models (MEMs) from the Fisheries and Marine Ecosystem Models Intercomparison Project forced by two Earth System Models under the high greenhouse gas emissions Shared Socioeconomic Pathways (SSP5-8.5) and a scenario of no fishing. Globally, total consumer biomass is projected to decrease by 16.7 \textpm{} 9.5\% more than net primary production (NPP) by 2090--2099 relative to 1995--2014, with substantial variations among MEMs and regions. Total consumer biomass is projected to decrease almost everywhere in the ocean (80\% of the world's oceans) in the model ensemble. In 40\% of the world's oceans, consumer biomass was projected to decrease more than NPP. Additionally, in another 36\% of the world's oceans consumer biomass is expected to decrease even as projected NPP increases. By analysing the biomass response within food webs in available MEMs, we found that model parameters and structures contributed to more complex responses than a consistent amplification of climate impacts of higher trophic levels. Our study provides additional insights into the ecological mechanisms that will impact marine ecosystems, thereby informing model and scenario development.},
langid = {english},
keywords = {Biomass,Boats,Climate change,Food,Food web structure,Marine ecosystems,Oceans,Signal amplification},
file = {/home/BARRIER/Zotero/storage/AL2UYDV4/Luzinais et al. - 2023 - Trophic amplification A model intercomparison of .pdf}
}
  • [DOI] A. Morell, Y. Shin, N. Barrier, M. {Travers-Trolet}, G. Halouani, and B. Ernande, Bioen-OSMOSE: A bioenergetic marine ecosystem model with physiological response to temperature and oxygenBiorxiv, 2023.
    [Bibtex] 
    @misc{morellBioenOSMOSEBioenergeticMarine2023,
title = {Bioen-{{OSMOSE}}: {{A}} Bioenergetic Marine Ecosystem Model with Physiological Response to Temperature and Oxygen},
shorttitle = {Bioen-{{OSMOSE}}},
author = {Morell, Alaia and Shin, Yunne-Jai and Barrier, Nicolas and {Travers-Trolet}, Morgane and Halouani, Ghassen and Ernande, Bruno},
year = 2023,
month = jan,
primaryclass = {New Results},
pages = {2023.01.13.523601},
publisher = {bioRxiv},
doi = {10.1101/2023.01.13.523601},
urldate = {2026-03-20},
abstract = {Marine ecosystem models have been used to project the impacts of climate-induced changes in temperature and oxygen on biodiversity mainly through changes in species spatial distributions and primary production. However, fish populations may also respond to climatic pressures via physiological changes, leading to modifications in their life history that could either mitigate or worsen the consequences of climate change.Building on the individual-based multispecies ecosystem model OSMOSE, Bioen-OSMOSE has been developed to account for high trophic levels' physiological responses to temperature and oxygen in future climate projections. This paper presents an overview of the Bioen-OSMOSE model, mainly detailing the new developments. These consist in the implementation of a bioenergetic sub-model that mechanistically describes somatic growth, sexual maturation and reproduction as they emerge from the energy fluxes sustained by food intake under the hypotheses of a biphasic growth model and plastic maturation age and size represented by a maturation reaction norm. These fluxes depend on temperature and oxygen concentration, thus allowing plastic physiological responses to climate change.To illustrate the capabilities of Bioen-OSMOSE to represent realistic ecosystem dynamics, the model is applied to the North Sea ecosystem. The model outputs are confronted with population biomass, catch, maturity ogive, mean size-at-age and diet data of each species of the fish community. A first exploration of current species spatial variability in response to temperature or oxygen is presented in this paper. The model succeeds in reproducing observations, with good performances for all indicators.This new model development opens the scope for new fields of research such as the exploration of seasonal or spatial variation in life history in response to biotic and abiotic factors at the individual, population and community levels. Understanding such variability is crucial to improve our knowledge on potential climate change impacts on marine ecosystems and to make more reliable projections under climate change scenarios.},
archiveprefix = {bioRxiv},
chapter = {New Results},
copyright = {\copyright{} 2023, Posted by Cold Spring Harbor Laboratory. This pre-print is available under a Creative Commons License (Attribution-NonCommercial-NoDerivs 4.0 International), CC BY-NC-ND 4.0, as described at http://creativecommons.org/licenses/by-nc-nd/4.0/},
langid = {english},
file = {/home/BARRIER/Zotero/storage/DHCVVVET/Morell et al. - 2023 - Bioen-OSMOSE A bioenergetic marine ecosystem model with physiological response to temperature and o.pdf}
}
  • [DOI] A. Morell, Y. Shin, N. Barrier, M. {Travers-Trolet}, and B. Ernande, Ev-OSMOSE: An eco-genetic marine ecosystem modelBiorxiv, 2023.
    [Bibtex] 
    @misc{morellEvOSMOSEEcogeneticMarine2023,
title = {Ev-{{OSMOSE}}: {{An}} Eco-Genetic Marine Ecosystem Model},
shorttitle = {Ev-{{OSMOSE}}},
author = {Morell, Alaia and Shin, Yunne-Jai and Barrier, Nicolas and {Travers-Trolet}, Morgane and Ernande, Bruno},
year = 2023,
month = feb,
primaryclass = {New Results},
pages = {2023.02.08.527669},
publisher = {bioRxiv},
doi = {10.1101/2023.02.08.527669},
urldate = {2026-03-20},
abstract = {In the last decade, marine ecosystem models have been increasingly used to project interspecific biodiversity under various global change and management scenarios, considering ecological dynamics only. However, fish populations may also adapt to climate and fishing pressures, via evolutionary changes, leading to modifications in their life-history that could either mitigate or worsen, or even make irreversible, the impacts of these pressures. Building on the multispecies individual-based model Bioen-OSMOSE, an eco-evolutionary fish community model, Ev-Osmose, has been developed to account for evolutionary dynamics together with physiological and ecological dynamics in fish diversity projections. A gametic inheritance module describing the individuals' genetic structure has been implemented. The genetic structure is defined by finite numbers of loci and alleles per locus that determine the genetic variability of growth, maturation and reproductive effort. Climate change and fishing activities will generate selection pressures on fish life-history traits that will respond through microevolution. This paper is an overview of the Ev-OSMOSE model. To illustrate the ability of the Ev-OSMOSE model to represent realistic fish community dynamics, genotypic and phenotypic traits' mean and variance and consistent evolutionary patterns, we applied the model to the North Sea ecosystem. The simulated outputs are confronted to observed data of commercial catch, maturity ogives and length at age and to estimates of biomass for each modeled species. In addition to the evaluation of their mean value, the emerging traits' variability is confronted to length-at-age and maturity data. To ensure the consistency of genetic inheritance and the resulting evolutionary patterns, we assessed the transmission of traits' genotypic value across cohorts. Overall, the state of the modelled ecosystem was convincing at all these different biological levels. These results open perspectives for using Ev-OSMOSE in different marine regions to project the eco-evolutionary impact of various global change and management scenarios on different biological levels.},
archiveprefix = {bioRxiv},
chapter = {New Results},
copyright = {\copyright{} 2023, Posted by Cold Spring Harbor Laboratory. This pre-print is available under a Creative Commons License (Attribution-NonCommercial-NoDerivs 4.0 International), CC BY-NC-ND 4.0, as described at http://creativecommons.org/licenses/by-nc-nd/4.0/},
langid = {english},
file = {/home/BARRIER/Zotero/storage/T5WC34FC/Morell et al. - 2023 - Ev-OSMOSE An eco-genetic marine ecosystem model.pdf}
}
  • [DOI] F. Moullec, N. Barrier, F. Guilhaumon, M. A. Peck, C. Ulses, and Y. Shin, "Rebuilding Mediterranean marine resources under climate change," Marine ecology progress series, vol. 708, p. 1–20, 2023.
    [Bibtex] 
    @article{moullecRebuildingMediterraneanMarine2023,
title = {Rebuilding {{Mediterranean}} Marine Resources under Climate Change},
author = {Moullec, Fabien and Barrier, Nicolas and Guilhaumon, Fran{\c c}ois and Peck, Myron A. and Ulses, Caroline and Shin, Yunne-Jai},
year = 2023,
month = mar,
journal = {Marine Ecology Progress Series},
volume = {708},
pages = {1--20},
issn = {1616-1599, 0171-8630},
doi = {10.3354/meps14269},
urldate = {2026-03-20},
abstract = {The Mediterranean Sea ranks among the most overexploited and fastest-warming ocean regions. This situation calls for urgent development of global change scenarios and models of marine...},
langid = {american},
keywords = {Biodiversity,Climate change,End-to-end model,Key words: Fishing scenarios,Mediterranean Sea,OSMOSE model},
file = {/home/BARRIER/Zotero/storage/L5IIYZCW/Moullec et al. - 2023 - Rebuilding Mediterranean marine resources under climate change.pdf}
}
  • [DOI] R. Sun, P. Sun, C. Fu, G. Liu, Z. Liang, Y. Shin, N. Barrier, and Y. Tian, "Exploring balanced harvest as a potential strategy for highly exploited multispecies fisheries," Ices journal of marine science, vol. 80, iss. 4, p. 897–910, 2023.
    [Bibtex] 
    @article{sunExploringBalancedHarvest2023,
title = {Exploring Balanced Harvest as a Potential Strategy for Highly Exploited Multispecies Fisheries},
author = {Sun, Runlong and Sun, Peng and Fu, Caihong and Liu, Guankui and Liang, Zhenlin and Shin, Yunne-Jai and Barrier, Nicolas and Tian, Yongjun},
year = 2023,
month = may,
journal = {ICES Journal of Marine Science},
volume = {80},
number = {4},
pages = {897--910},
issn = {1054-3139},
doi = {10.1093/icesjms/fsad023},
urldate = {2026-03-20},
abstract = {Balanced harvest (BH) proposes moderate fishing mortality rates across all species or sizes in proportion to productivity, serving as a possible strategy for ecosystem-based fisheries management. Fishing patterns in some developing countries (e.g. China, the largest producer of seafood) closely resemble BH, where catches have been highly diversified by unselective gears due to market demand for almost all species. In this study, we employed an OSMOSE ecosystem model developed for the Yellow Sea in China to investigate the potential occurrences and advantages of BH in this region with highly exploited multispecies fisheries. Simulations were carried out under four types of fishing scenarios, where various levels of fishing mortality rates for all species or specific functional groups were implemented. Results indicated that the occurrences of BH depended on fishing pressure and targeted functional groups, and that size-level BH was significantly correlated with biomass and yield for most species. In particular, varying fishing pressure for certain functional groups resulted in BH, which produced a high yield for specific species and ensured their biomass sustainability. We concluded that the benefits of BH could be potentially achieved by adjusting fishing pressure for certain functional groups based on the existing fishing pattern in over-exploited ecosystems.},
file = {/home/BARRIER/Zotero/storage/JSTUDXPI/Sun et al. - 2023 - Exploring balanced harvest as a potential strategy for highly exploited multispecies fisheries.pdf}
}
  • [DOI] A. Tagliabue, B. S. Twining, N. Barrier, O. Maury, M. Berger, and L. Bopp, "Ocean iron fertilization may amplify climate change pressures on marine animal biomass for limited climate benefit," Global change biology, vol. 29, iss. 18, p. 5250–5260, 2023.
    [Bibtex] 
    @article{tagliabueOceanIronFertilization2023,
title = {Ocean Iron Fertilization May Amplify Climate Change Pressures on Marine Animal Biomass for Limited Climate Benefit},
author = {Tagliabue, Alessandro and Twining, Benjamin S. and Barrier, Nicolas and Maury, Olivier and Berger, Manon and Bopp, Laurent},
year = 2023,
month = sep,
journal = {Global Change Biology},
volume = {29},
number = {18},
pages = {5250--5260},
issn = {1354-1013, 1365-2486},
doi = {10.1111/gcb.16854},
urldate = {2024-08-30},
abstract = {Abstract Climate change scenarios suggest that large-scale carbon dioxide removal (CDR) will be required to maintain global warming below 2{$^\circ$}C, leading to renewed attention on ocean iron fertilization (OIF). Previous OIF modelling has found that while carbon export increases, nutrient transport to lower latitude ecosystems declines, resulting in a modest impact on atmospheric CO 2 . However, the interaction of these CDR responses with ongoing climate change is unknown. Here, we combine global ocean biogeochemistry and ecosystem models to show that, while stimulating carbon sequestration, OIF may amplify climate-induced declines in tropical ocean productivity and ecosystem biomass under a high-emission scenario, with very limited potential atmospheric CO 2 drawdown. The `biogeochemical fingerprint' of climate change, that leads to depletion of upper ocean major nutrients due to upper ocean stratification, is reinforced by OIF due to greater major nutrient consumption. Our simulations show that reductions in upper trophic level animal biomass in tropical regions due to climate change would be exacerbated by OIF within \textasciitilde 20\,years, especially in coastal exclusive economic zones (EEZs), with potential implications for fisheries that underpin the livelihoods and economies of coastal communities. Any fertilization-based CDR should therefore consider its interaction with ongoing climate-driven changes and the ensuing ecosystem impacts in national EEZs.},
langid = {english},
keywords = {biogeochemical cycles,climate change,marine carbon dioxide removal,marine ecosystems,ocean iron fertilization,ocean net primary production},
file = {/home/BARRIER/Zotero/storage/UHZKGLGY/Tagliabue et al. - 2023 - Ocean iron fertilization may amplify climate change pressures on marine animal biomass for limited c.pdf}
}
  • [DOI] L. Xing, J. Tang, S. Tian, and N. Barrier, "Simulating impacts of fishing toothfish on the pelagic community in the Cooperation Sea, Southern Ocean," Regional studies in marine science, vol. 68, p. 103227, 2023.
    [Bibtex] 
    @article{xingSimulatingImpactsFishing2023,
title = {Simulating Impacts of Fishing Toothfish on the Pelagic Community in the {{Cooperation Sea}}, {{Southern Ocean}}},
author = {Xing, Lei and Tang, Jianye and Tian, Siquan and Barrier, Nicolas},
year = 2023,
month = dec,
journal = {Regional Studies in Marine Science},
volume = {68},
pages = {103227},
issn = {2352-4855},
doi = {10.1016/j.rsma.2023.103227},
urldate = {2026-03-20},
abstract = {There is increasing attention to the use of Antarctic toothfish (Dissostichus mawsoni) and Patagonian toothfish (Dissostichus eleginoides). Understanding the responses of toothfish and other species to fishing activities favors the sustainable use of natural resources. We developed an end-to-end model OSMOSE-CooperationSea to simulate the food web dynamics in the Cooperation Sea and evaluate the impact of toothfish fishery. Fishes and cephalopods played important roles in the energy pathways from krill species and other zooplankton species to toothfish and Weddell seal (Leptonychotes weddellii) whose trophic levels were higher than 5.0. Ad\'elie penguin (Pygoscelis ad\'eliae), Crabeater seal (Lobodon carcinophaga), and Baleen whales were strongly krill-reliant. The spawning stock of toothfish decreased more quickly than the recruitments with increasing fishing pressure. Fishing impacts on the recruitments of toothfish were hysteretic due to the fishing selectivity. The model considered an ontogenetic diet shift of toothfish that mesopelagic fish was influential to toothfish juveniles. The overexploitation of toothfish stock might result in a trophic cascade that mesopelagic fish biomass increased and krill biomass declined. Ad\'elie penguin, Crabeater seal, and Baleen whales preyed on more small fishes in response to the decline of krill biomass. Considering the impacts of changes in Antarctic krill availability, the biomass of Ad\'elie penguin, Crabeater seal, and Baleen whales declined with a heavy toothfish fishery. The study highlights the importance of precautionary and ecosystem-based management to toothfish fishery.},
keywords = {Cooperation Sea,Ecosystem impacts,OSMOSE-CooperationSea model,Toothfish fishery},
file = {/home/BARRIER/Zotero/storage/BXRG6DZI/Xing et al. - 2023 - Simulating impacts of fishing toothfish on the pelagic community in the Cooperation Sea, Southern Oc.pdf;/home/BARRIER/Zotero/storage/C7R5NB6D/S2352485523004176.html}
}

2022

  • J. Guiet, D. Bianchi, O. Maury, N. Barrier, and F. Kessouri, "Movement Shapes the Structure of Fish Communities Along a Cross-Shore Section in the California Current," Frontiers in marine science, vol. 9, 2022.
    [Bibtex] 
    @article{guietMovementShapesStructure2022,
title = {Movement {{Shapes}} the {{Structure}} of {{Fish Communities Along}} a {{Cross-Shore Section}} in the {{California Current}}},
author = {Guiet, J{\'e}r{\^o}me and Bianchi, Daniele and Maury, Olivier and Barrier, Nicolas and Kessouri, Fay{\c c}al},
year = 2022,
journal = {Frontiers in Marine Science},
volume = {9},
issn = {2296-7745},
urldate = {2023-02-17},
abstract = {Pelagic fish communities are shaped by bottom-up and top-down processes, transport by currents, and active swimming. However, the interaction of these processes remains poorly understood. Here, we use a regional implementation of the APex ECOSystem Model (APECOSM), a mechanistic model of the pelagic food web, to investigate these processes in the California Current, a highly productive upwelling system characterized by vigorous mesoscale circulation. The model is coupled with an eddy-resolving representation of ocean currents and lower trophic levels, and is tuned to reproduce observed fish biomass from fisheries independent trawls. Several emergent properties of the model compare realistically with observations. First, the epipelagic community accounts for one order of magnitude less biomass than the vertically migratory community, and is composed by smaller species. Second, the abundance of small fish decreases from the coast to the open ocean, while the abundance of large fish remains relatively uniform. This in turn leads to flattening of biomass size-spectra away from the coast for both communities. Third, the model reproduces a cross-shore succession of small to large sizes moving offshore, consistent with observations of species occurrence. These cross-shore variations emerge in the model from a combination of: (1) passive offshore advection by the mean current, (2) active swimming toward coastal productive regions to counterbalance this transport, and (3) mesoscale heterogeneity that reduces the ability of organisms to return to coastal waters. Our results highlight the importance of passive and active movement in structuring the pelagic food web, and suggest that a representation of these processes can help to improve the realism in simulations with marine ecosystem models.},
keywords = {California Current,community composition,marine ecosystem model,pelagic fish,Size spectrum,Swimming},
file = {/home/BARRIER/Zotero/storage/QU5L9Y79/Guiet et al. - 2022 - Movement Shapes the Structure of Fish Communities .pdf}
}
  • [DOI] J. McDowell, M. Andrello, L. Velez, N. Barrier, S. Manel, L. J. Pollock, and D. Mouillot, Global connectivity and networks of marine reservesBiorxiv, 2022.
    [Bibtex] 
    @misc{mcdowellGlobalConnectivityNetworks2022,
title = {Global Connectivity and Networks of Marine Reserves},
author = {McDowell, Julia and Andrello, Marco and Velez, Laure and Barrier, Nicolas and Manel, Stephanie and Pollock, Laura J. and Mouillot, David},
year = 2022,
month = nov,
primaryclass = {New Results},
pages = {2022.11.20.515214},
publisher = {bioRxiv},
doi = {10.1101/2022.11.20.515214},
urldate = {2026-03-20},
abstract = {Cooperation between countries in managing and protecting shared marine resources is beneficial both ecologically and economically, but how best to establish the cooperation needed at a global scale is largely unknown. Here, we used hydrodynamic modelling to identify ecologically connected networks of marine reserves (MRs) and evaluated these networks with socio-economic indicators. Most of the networks are homogenous with similar levels of development, shared languages, and other cultural values. However, we found that 17\% (11/66) of the largest networks ({$>$}20 MRs) span multiple countries. These heterogenous networks are composed of countries with different economic, political, and cultural views. Countries that control more, larger marine reserves also have a more even ratio of source reserves to sinks. We discuss that, while such economic and cultural homogeneity might lead to more efficient ecological management in the short term, heterogeneous networks may prove to be more resilient in the longer term, when climate change will modify marine connectivity.},
archiveprefix = {bioRxiv},
chapter = {New Results},
copyright = {\copyright{} 2022, Posted by Cold Spring Harbor Laboratory. This pre-print is available under a Creative Commons License (Attribution-NonCommercial-NoDerivs 4.0 International), CC BY-NC-ND 4.0, as described at http://creativecommons.org/licenses/by-nc-nd/4.0/},
langid = {english},
file = {/home/BARRIER/Zotero/storage/ISDMJNI7/McDowell et al. - 2022 - Global connectivity and networks of marine reserves.pdf}
}
  • [DOI] E. Meerhoff, V. Combes, R. Matano, N. Barrier, B. Franco, A. Piola, F. {Hernández-Vaca}, and O. Defeo, "Large-scale connectivity of the sandy beach clam \emphMesodesma\emph Mactroides along the Atlantic coast of South America, and climate change implications," Marine environmental research, vol. 176, p. 105591, 2022.
    [Bibtex] 
    @article{meerhoffLargescaleConnectivitySandy2022,
title = {Large-Scale Connectivity of the Sandy Beach Clam {{{\emph{Mesodesma}}}}{\emph{ Mactroides}} along the {{Atlantic}} Coast of {{South America}}, and Climate Change Implications},
author = {Meerhoff, Erika and Combes, Vincent and Matano, Ricardo and Barrier, Nicolas and Franco, Barbara and Piola, Alberto and {Hern{\'a}ndez-Vaca}, Freddy and Defeo, Omar},
year = 2022,
month = apr,
journal = {Marine Environmental Research},
volume = {176},
pages = {105591},
issn = {0141-1136},
doi = {10.1016/j.marenvres.2022.105591},
urldate = {2026-03-20},
abstract = {The yellow clam Mesodesma mactroides is a cool-water species that typifies sandy beaches of the Southwestern Atlantic Ocean (SAO), which embraces one of the strongest ocean warming hotspots. The region is influenced by the Rio de la Plata (RdlP), which represents a zoogeographic barrier that restricts its larval exchange. We investigated yellow clam larval connectivity patterns using an individual based model (IBM). The IBM combined outputs from a 3D hydrodynamic model with a clam submodel that considered salinity- and temperature-dependent mortality for the planktonic larvae. Connectivity across the RdlP estuary occurred only for larvae released in spring during a strong La Ni\~na event. Mortality due to freshwater precluded larval transport across the RdlP, whereas larval mortality induced by warmer waters reduced connectivity, leading to self-recruitment in most areas. Warming acceleration in this hotspot could further restrict larval connectivity between populations in the SAO, with conservation implications for this threatened species.},
keywords = {Individual-based model,Larval connectivity,Salinity-dependent larval mortality,Temperature-dependent larval mortality,Warming hotspot,Yellow clam},
file = {/home/BARRIER/Zotero/storage/ZGG75XWW/Meerhoff et al. - 2022 - Large-scale connectivity of the sandy beach clam Mesodesma mactroides along the Atlantic coas.pdf;/home/BARRIER/Zotero/storage/P33ZDCY7/S0141113622000368.html}
}
  • [DOI] F. Moullec, N. Barrier, S. Drira, F. Guilhaumon, T. Hattab, M. A. Peck, and Y. Shin, "Using species distribution models only may underestimate climate change impacts on future marine biodiversity," Ecological modelling, vol. 464, p. 109826, 2022.
    [Bibtex] 
    @article{moullecUsingSpeciesDistribution2022,
title = {Using Species Distribution Models Only May Underestimate Climate Change Impacts on Future Marine Biodiversity},
author = {Moullec, Fabien and Barrier, Nicolas and Drira, Sabrine and Guilhaumon, Fran{\c c}ois and Hattab, Tarek and Peck, Myron A. and Shin, Yunne-Jai},
year = 2022,
month = feb,
journal = {Ecological Modelling},
volume = {464},
pages = {109826},
issn = {0304-3800},
doi = {10.1016/j.ecolmodel.2021.109826},
urldate = {2026-03-20},
abstract = {In face of global changes, projecting and mapping biodiversity changes are of critical importance to support management and conservation measures of marine ecosystems. Despite the development of a wide variety of ecosystem models capable of integrating an increasing number of ecological processes, most projections of climate-induced changes in marine biodiversity are based on species distribution models (SDMs). These correlative models present a significant advantage when the lack of knowledge on the species physiology is counterbalanced by the availability of relevant environmental variables over the species geographical range. However, correlative SDMs neglect intra- and inter-specific interactions and thereby can lead to biased projections of changes in biodiversity distribution. To evaluate the influence of trophic interactions on projections of species richness and assemblage composition under climate change scenarios, we compared biodiversity projections derived from an ensemble of different SDMs to projections derived from a hybrid model coupling SDMs and a multispecies trophic model in the Mediterranean Sea. Our results show that accounting for trophic interactions modifies projections of future biodiversity in the Mediterranean Sea. Under the RCP8.5 scenario, SDMs tended to overestimate the gains and underestimate the losses of species richness by the end of the 21st century, with marked local differences in projections, both in terms of magnitude and trend, in some biodiversity hotspots. In both SDMs and hybrid approaches, nestedness with gains in species richness was the main pattern driving dissimilarity between present and future fish and macro-invertebrate species assemblages at the Mediterranean basin scale. However, at local scale, we highlighted some differences in the relative contribution of nestedness vs replacement in driving dissimilarity. Our results call for the development of integrated modelling tools that can mechanistically consider multiple biotic and abiotic drivers to improve projections of future marine biodiversity.},
keywords = {Beta diversity,Climate change,End-to-end model,Mediterranean sea,Osmose model,Species distribution model},
file = {/home/BARRIER/Zotero/storage/YT2ULTPV/Moullec et al. - 2022 - Using species distribution models only may underestimate climate change impacts on future marine bio.pdf;/home/BARRIER/Zotero/storage/CVTJD7YY/S0304380021003690.html}
}
  • [DOI] L. Xing, Y. Chen, K. R. Tanaka, N. Barrier, and Y. Ren, "Evaluating the Hatchery Program of a Highly Exploited Shrimp Stock (Fenneropenaeus chinensis) in a Temperate Marine Ecosystem," Frontiers in marine science, vol. 9, 2022.
    [Bibtex] 
    @article{xingEvaluatingHatcheryProgram2022,
title = {Evaluating the {{Hatchery Program}} of a {{Highly Exploited Shrimp Stock}} ({{Fenneropenaeus}} Chinensis) in a {{Temperate Marine Ecosystem}}},
author = {Xing, Lei and Chen, Yong and Tanaka, Kisei R. and Barrier, Nicolas and Ren, Yiping},
year = 2022,
month = mar,
journal = {Frontiers in Marine Science},
volume = {9},
publisher = {Frontiers},
issn = {2296-7745},
doi = {10.3389/fmars.2022.789805},
urldate = {2026-03-20},
abstract = {Hatchery programs are commonly used to enhance fishery stocks, while the efforts to minimize potential negative ecological impacts have grown in recent years. In China, Fenneropenaeus chinensis is a fast-growing, short-lived shrimp species with a high commercial value. F. chinensis fishery is heavily dependent on the hatchery program. We evaluated the trade-off between economic profits and ecological impacts of F. chinensis hatchery program in the Jiaozhou Bay of China. The total length of released individuals was 1.4 cm. The results showed that artificially released F. chinensis individuals experienced high predation pressure during the first two weeks. The economic profit peaked when 198 million individuals were released. The modeled hatchery program yielded a lower proportion of individuals with the increasing amount of F. chinensis release. The temporally uniform hatchery release was more efficient than other hatchery release scenarios (e.g., increasing the released amount year by year) in a long-term hatchery program. F. chinensis had the negative impacts on two large predatory fishes. Large fishes recovered at a slower rate than small fishes after the F. chinensis release stopped. Reducing fishing pressure could offset negative impacts of F. chinensis release on large fishes. The study indicates that the effectiveness of F. chinensis release cannot be enhanced by simply increasing the released amount. A long-term F. chinensis hatchery program with a large released amount may present additional challenges for managing natural resources in an ecosystem context.},
langid = {english},
keywords = {Ecological impacts,Economic profits,Fenneropenaeus chinensis release,Jiaozhou Bay,OSMOSE-JZB model},
file = {/home/BARRIER/Zotero/storage/UPMR6KU8/Xing et al. - 2022 - Evaluating the Hatchery Program of a Highly Exploited Shrimp Stock (Fenneropenaeus chinensis) in a T.pdf}
}

2021

  • [DOI] A. Dupaix, M. Capello, C. Lett, M. Andrello, N. Barrier, G. Viennois, and L. Dagorn, "Surface habitat modification through industrial tuna fishery practices," Ices journal of marine science, vol. 78, iss. 9, p. 3075–3088, 2021.
    [Bibtex] 
    @article{dupaixSurfaceHabitatModification2021,
title = {Surface Habitat Modification through Industrial Tuna Fishery Practices},
author = {Dupaix, Ama{\"e}l and Capello, Manuela and Lett, Christophe and Andrello, Marco and Barrier, Nicolas and Viennois, Ga{\"e}lle and Dagorn, Laurent},
year = 2021,
month = nov,
journal = {ICES Journal of Marine Science},
volume = {78},
number = {9},
pages = {3075--3088},
issn = {1054-3139},
doi = {10.1093/icesjms/fsab175},
urldate = {2026-03-20},
abstract = {Natural floating objects (FOBs) have always been a major component of the habitat of pelagic species. Since the 1990s,~the number of FOBs in the open ocean has increased greatly as a result of the introduction of fish aggregating devices (FADs) by the industrial tropical tuna purse seine vessels. These changes, and their potential impacts on the species that associate with FOBs, remain poorly understood. Using fisheries observer data, data from satellite-linked tracking buoys attached to FOBs and Lagrangian simulations, this study quantifies the temporal changes in the density and spatial distribution of FOBs due to the use of FADs in the Indian Ocean (IO) between 2006 and 2018. From 2012 to 2018, the entire western IO is impacted, with FADs representing more than 85\% of the overall FOBs, natural FOBs less than 10\%, and objects originating from pollution 5\%. Results also suggest that both FADs and natural FOBs densities are lower in the eastern IO, but this initial investigation highlights the need for further studies. Our study confirms that FADs have greatly modified the density and spatial distribution of FOBs, which highlights the need to investigate potential consequences on the ecology of associated species.},
file = {/home/BARRIER/Zotero/storage/I3JIEB5K/Dupaix et al. - 2021 - Surface habitat modification through industrial tuna fishery practices.pdf}
}
  • [DOI] R. F. Heneghan, E. Galbraith, J. L. Blanchard, C. Harrison, N. Barrier, C. Bulman, W. Cheung, M. Coll, T. D. Eddy, M. {Erauskin-Extramiana}, J. D. Everett, J. A. {Fernandes-Salvador}, D. Gascuel, J. Guiet, O. Maury, J. {Palacios-Abrantes}, C. M. Petrik, H. {du Pontavice}, A. J. Richardson, J. Steenbeek, T. C. Tai, J. Volkholz, P. A. {Woodworth-Jefcoats}, and D. P. Tittensor, "Disentangling diverse responses to climate change among global marine ecosystem models," Progress in oceanography, vol. 198, p. 102659, 2021.
    [Bibtex] 
    @article{heneghanDisentanglingDiverseResponses2021,
title = {Disentangling Diverse Responses to Climate Change among Global Marine Ecosystem Models},
author = {Heneghan, Ryan F. and Galbraith, Eric and Blanchard, Julia L. and Harrison, Cheryl and Barrier, Nicolas and Bulman, Catherine and Cheung, William and Coll, Marta and Eddy, Tyler D. and {Erauskin-Extramiana}, Maite and Everett, Jason D. and {Fernandes-Salvador}, Jose A. and Gascuel, Didier and Guiet, Jerome and Maury, Olivier and {Palacios-Abrantes}, Juliano and Petrik, Colleen M. and {du Pontavice}, Hubert and Richardson, Anthony J. and Steenbeek, Jeroen and Tai, Travis C. and Volkholz, Jan and {Woodworth-Jefcoats}, Phoebe A. and Tittensor, Derek P.},
year = 2021,
month = nov,
journal = {Progress in Oceanography},
volume = {198},
pages = {102659},
issn = {0079-6611},
doi = {10.1016/j.pocean.2021.102659},
urldate = {2022-05-24},
abstract = {Climate change is warming the ocean and impacting lower trophic level (LTL) organisms. Marine ecosystem models can provide estimates of how these changes will propagate to larger animals and impact societal services such as fisheries, but at present these estimates vary widely. A better understanding of what drives this inter-model variation will improve our ability to project fisheries and other ecosystem services into the future, while also helping to identify uncertainties in process understanding. Here, we explore the mechanisms that underlie the diversity of responses to changes in temperature and LTLs in eight global marine ecosystem models from the Fisheries and Marine Ecosystem Model Intercomparison Project (FishMIP). Temperature and LTL impacts on total consumer biomass and ecosystem structure (defined as the relative change of small and large organism biomass) were isolated using a comparative experimental protocol. Total model biomass varied between -35\% to +3\% in response to warming, and -17\% to +15\% in response to LTL changes. There was little consensus about the spatial redistribution of biomass or changes in the balance between small and large organisms (ecosystem structure) in response to warming, an LTL impacts on total consumer biomass varied depending on the choice of LTL forcing terms. Overall, climate change impacts on consumer biomass and ecosystem structure are well approximated by the sum of temperature and LTL impacts, indicating an absence of nonlinear interaction between the models' drivers. Our results highlight a lack of theoretical clarity about how to represent fundamental ecological mechanisms, most importantly how temperature impacts scale from individual to ecosystem level, and the need to better understand the two-way coupling between LTL organisms and consumers. We finish by identifying future research needs to strengthen global marine ecosystem modelling and improve projections of climate change impacts.},
langid = {english},
keywords = {Climatic change,Fishery oceanography,FishMIP,Marine ecology,Modelling,Structural uncertainty},
file = {/home/BARRIER/Zotero/storage/SRIF56WM/Heneghan et al. - 2021 - Disentangling diverse responses to climate change .pdf;/home/BARRIER/Zotero/storage/MQX288HL/S0079661121001440.html}
}
  • [DOI] C. Poppeschi, G. Charria, E. Goberville, P. {Rimmelin-Maury}, N. Barrier, S. Petton, M. Unterberger, E. Grossteffan, M. Repecaud, L. Quéméner, S. Theetten, J. Le Roux, and P. Tréguer, "Unraveling Salinity Extreme Events in Coastal Environments: A Winter Focus on the Bay of Brest," Frontiers in marine science, vol. 8, 2021.
    [Bibtex] 
    @article{poppeschiUnravelingSalinityExtreme2021,
title = {Unraveling {{Salinity Extreme Events}} in {{Coastal Environments}}: {{A Winter Focus}} on the {{Bay}} of {{Brest}}},
shorttitle = {Unraveling {{Salinity Extreme Events}} in {{Coastal Environments}}},
author = {Poppeschi, Coline and Charria, Guillaume and Goberville, Eric and {Rimmelin-Maury}, Peggy and Barrier, Nicolas and Petton, S{\'e}bastien and Unterberger, Maximilian and Grossteffan, Emilie and Repecaud, Michel and Qu{\'e}m{\'e}ner, Lo{\"i}c and Theetten, S{\'e}bastien and Le Roux, Jean-Fran{\c c}ois and Tr{\'e}guer, Paul},
year = 2021,
month = jul,
journal = {Frontiers in Marine Science},
volume = {8},
publisher = {Frontiers},
issn = {2296-7745},
doi = {10.3389/fmars.2021.705403},
urldate = {2026-03-20},
abstract = {Extreme weather events affect coastal marine ecosystems. The increase in intensity and occurrence of such events drive modifications in coastal hydrology and hydrodynamics. Here, focusing on the winter period (from December to March), we investigated long-term (2000-2018) changes in the hydrological properties of the Bay of Brest (French Atlantic coast) as an example of the response of a semi-enclosed bay to extreme weather episodes and large-scale atmospheric circulation patterns. The relationships between extreme weather events and severe low salinity conditions (as a proxy for changes in water density) were investigated using high-frequency in situ observations and high-resolution numerical simulations. The identification of intense episodes was based on the timing, duration and annual occurrence of extreme events. By examining the interannual variability of extreme low salinity events, we detect a patent influence of local and regional weather conditions on atmospheric and oceanic circulation patterns, precipitation and river runoff. We revealed that low salinity events in Brittany were controlled by large-scale forcings: they prevailed during the positive phase of the North Atlantic Oscillation and periods of low occurrences of the Atlantic Ridge weather regime. The increase in severe storms observed in western France since 2010 has led to a doubling of the occurrence and duration of extreme low salinity events in Brittany.},
langid = {english},
keywords = {Atmospheric weather regimes,Bay of Brest,extreme events,river plume,Salinity},
file = {/home/BARRIER/Zotero/storage/TN5SHC2L/Poppeschi et al. - 2021 - Unraveling Salinity Extreme Events in Coastal Environments A Winter Focus on the Bay of Brest.pdf}
}
  • [DOI] D. P. Tittensor, C. Novaglio, C. S. Harrison, R. F. Heneghan, N. Barrier, D. Bianchi, L. Bopp, A. {Bryndum-Buchholz}, G. L. Britten, M. Büchner, W. W. L. Cheung, V. Christensen, M. Coll, J. P. Dunne, T. D. Eddy, J. D. Everett, J. A. {Fernandes-Salvador}, E. A. Fulton, E. D. Galbraith, D. Gascuel, J. Guiet, J. G. John, J. S. Link, H. K. Lotze, O. Maury, K. {Ortega-Cisneros}, J. {Palacios-Abrantes}, C. M. Petrik, H. {du Pontavice}, J. Rault, A. J. Richardson, L. Shannon, Y. Shin, J. Steenbeek, C. A. Stock, and J. L. Blanchard, "Next-generation ensemble projections reveal higher climate risks for marine ecosystems," Nature climate change, vol. 11, iss. 11, p. 973–981, 2021.
    [Bibtex] 
    @article{tittensorNextgenerationEnsembleProjections2021,
title = {Next-Generation Ensemble Projections Reveal Higher Climate Risks for Marine Ecosystems},
author = {Tittensor, Derek P. and Novaglio, Camilla and Harrison, Cheryl S. and Heneghan, Ryan F. and Barrier, Nicolas and Bianchi, Daniele and Bopp, Laurent and {Bryndum-Buchholz}, Andrea and Britten, Gregory L. and B{\"u}chner, Matthias and Cheung, William W. L. and Christensen, Villy and Coll, Marta and Dunne, John P. and Eddy, Tyler D. and Everett, Jason D. and {Fernandes-Salvador}, Jose A. and Fulton, Elizabeth A. and Galbraith, Eric D. and Gascuel, Didier and Guiet, Jerome and John, Jasmin G. and Link, Jason S. and Lotze, Heike K. and Maury, Olivier and {Ortega-Cisneros}, Kelly and {Palacios-Abrantes}, Juliano and Petrik, Colleen M. and {du Pontavice}, Hubert and Rault, Jonathan and Richardson, Anthony J. and Shannon, Lynne and Shin, Yunne-Jai and Steenbeek, Jeroen and Stock, Charles A. and Blanchard, Julia L.},
year = 2021,
month = nov,
journal = {Nature Climate Change},
volume = {11},
number = {11},
pages = {973--981},
publisher = {Nature Publishing Group},
issn = {1758-6798},
doi = {10.1038/s41558-021-01173-9},
urldate = {2022-05-23},
abstract = {Projections of climate change impacts on marine ecosystems have revealed long-term declines in global marine animal biomass and unevenly distributed impacts on fisheries. Here we apply an enhanced suite of global marine ecosystem models from the Fisheries and Marine Ecosystem Model Intercomparison Project (Fish-MIP), forced by new-generation Earth system model outputs from Phase 6 of the Coupled Model Intercomparison Project (CMIP6), to provide insights into how projected climate change will affect future ocean ecosystems. Compared with the previous generation CMIP5-forced Fish-MIP ensemble, the new ensemble ecosystem simulations show a greater decline in mean global ocean animal biomass under both strong-mitigation and high-emissions scenarios due to elevated warming, despite greater uncertainty in net primary production in the high-emissions scenario. Regional shifts in the direction of biomass changes highlight the continued and urgent need to reduce uncertainty in the projected responses of marine ecosystems to climate change to help support adaptation planning.},
copyright = {2021 The Author(s)},
langid = {english},
keywords = {Climate-change ecology,Ecological modelling,Marine biology},
file = {/home/BARRIER/Zotero/storage/6KG6LYSV/Tittensor et al. - 2021 - Next-generation ensemble projections reveal higher.pdf;/home/BARRIER/Zotero/storage/3J3QFKE8/s41558-021-01173-9.html}
}
  • [DOI] L. Xing, Y. Chen, R. Boenish, K. R. Tanaka, N. Barrier, and Y. Ren, "Evaluating the impacts of fishing and migratory species in a temperate bay of China using the ecosystem model OSMOSE-JZB," Fisheries research, vol. 243, p. 106051, 2021.
    [Bibtex] 
    @article{xingEvaluatingImpactsFishing2021,
title = {Evaluating the Impacts of Fishing and Migratory Species in a Temperate Bay of {{China}} Using the Ecosystem Model {{OSMOSE-JZB}}},
author = {Xing, Lei and Chen, Yong and Boenish, Robert and Tanaka, Kisei R. and Barrier, Nicolas and Ren, Yiping},
year = 2021,
month = nov,
journal = {Fisheries Research},
volume = {243},
pages = {106051},
issn = {0165-7836},
doi = {10.1016/j.fishres.2021.106051},
urldate = {2026-03-20},
abstract = {Small-scale fisheries (SSFs) play a vital role in the sustainability of local economies. Migratory species moving into and out of an ecosystem may influence the dynamics of local fish communities and SSFs. We used the end-to-end model, OSMOSE-JZB (Object-oriented Simulator of Marine ecOSystEms), to evaluate the impacts of fishing and a migratory shrimp (Trachypenaeus curvirostris) on the ecosystem of Jiaozhou Bay, China. Increased fishing intensity (i.e., annual fishing effort) resulted in the decline of four ecological indicators, including the total biomass of the community, mean trophic level of the community, inverse fishing pressure, and large fish index. Compared to managing fish stocks under uniform fishing mortality over the fishing season, landings and community biomass were higher when a ``race to fish'' (i.e., large catches in a short period) occurred. The results suggested that managing fishing seasonality (i.e., temporal allocation of fishing effort) could mitigate the negative impact of fishing intensity. Two resident high-trophic-level fishes were sensitive to changes in fishing intensity and fishing seasonality. The changes in trophic interactions had larger impacts on species at low trophic levels than fishing. Pearson's correlation analysis showed that T. curvirostris biomass was negatively correlated with the biomass of resident species and positively correlated with the biomass of other migratory species. We also found that fishing changed the impact of varying T. curvirostris migratory biomass on other species. Resident species were more sensitive to changes in fishing and T. curvirostris migratory biomass than other migratory species. We argue that SSFs management can benefit from the development of temporal fishing strategies and consideration of trophic interactions stemming from migratory species dynamics.},
keywords = {Jiaozhou Bay,OSMOSE,Race to fish,Small-scale fisheries,Trophic interactions},
file = {/home/BARRIER/Zotero/storage/TDGR2ZWT/Xing et al. - 2021 - Evaluating the impacts of fishing and migratory species in a temperate bay of China using the ecosys.pdf}
}

2020

  • [DOI] G. Charria, P. {Rimmelin-Maury}, E. Goberville, S. L'Helguen, N. Barrier, C. {David-Beausire}, T. Cariou, E. Grossteffan, M. Repecaud, L. Quémener, S. Theetten, and P. Tréguer, "Temperature and Salinity Changes in Coastal Waters of Western Europe: Variability, Trends and Extreme Events," in Evolution of Marine Coastal Ecosystems under the Pressure of Global Changes, Cham, 2020, p. 207–226.
    [Bibtex] 
    @inproceedings{charriaTemperatureSalinityChanges2020,
title = {Temperature and {{Salinity Changes}} in {{Coastal Waters}} of {{Western Europe}}: {{Variability}}, {{Trends}} and {{Extreme Events}}},
shorttitle = {Temperature and {{Salinity Changes}} in {{Coastal Waters}} of {{Western Europe}}},
booktitle = {Evolution of {{Marine Coastal Ecosystems}} under the {{Pressure}} of {{Global Changes}}},
author = {Charria, Guillaume and {Rimmelin-Maury}, Peggy and Goberville, Eric and L'Helguen, St{\'e}phane and Barrier, Nicolas and {David-Beausire}, Christine and Cariou, Thierry and Grossteffan, Emilie and Repecaud, Michel and Qu{\'e}mener, Lo{\"i}c and Theetten, S{\'e}bastien and Tr{\'e}guer, Paul},
editor = {Ceccaldi, Hubert-Jean and H{\'e}nocque, Yves and Komatsu, Teruhisa and Prouzet, Patrick and Sautour, Benoit and Yoshida, Jiro},
year = 2020,
pages = {207--226},
publisher = {Springer International Publishing},
address = {Cham},
doi = {10.1007/978-3-030-43484-7_15},
abstract = {Coastal marine ecosystems worldwide are not only highly affected by the effects of human activities, but also by the influence of natural climate variability and global climate change. However, it is still a challenge to assess the spatial and temporal scales at which forcings operate and their persistence over time, to determine the vulnerability of coastal ecosystems to climate changes and climate extreme events, and therefore to anticipate the ecological and biological responses of these areas. By investigating these knowledge gaps, our recent studies have shown that the combination of large- and local-scale hydro-climatic influences have induced obvious changes in the physical and chemical characteristics of coastal waters in Western Europe. Because of the complex and non-linear climate-coastal ecosystem relationships, a thorough understanding of the underlying processes is still needed, while extending the spatial and temporal scales of inference. Here, using both high- and low-frequency observations collected from 1998 onwards at the outlet of the Bay of Brest and off Roscoff, we described and documented monthly changes in (1) sea surface temperature, (2) sea surface salinity, (3) river discharges and (4) precipitation patterns. By focusing on the winter period (from December to February), our study revealed that coastal waters of Western Europe are not only significantly connected to large-scale atmospheric conditions and patterns, but also to local-scale drivers such as river discharges. Current strong impacts of regional climate extreme events worldwide led us to devote more attention on understanding the possible impacts of such episodes on the long-term variability and trends of these ecosystems in coastal waters of Western Europe. The signature of extreme events in the Bay of Brest is described and the numerical simulations allowed us to highlight the link between local rivers and changes in salinity.},
copyright = {All rights reserved},
isbn = {978-3-030-43484-7},
langid = {english},
keywords = {Climate variability,Coastal ecosystems,Extreme events,High- and low-frequency in situ sampling,Large and local forcings},
file = {/home/BARRIER/Zotero/storage/ZCRHJZXJ/Charria et al. - 2020 - Temperature and Salinity Changes in Coastal Waters.pdf}
}
  • [DOI] E. Crochelet, N. Barrier, M. Andrello, F. Marsac, A. Spadone, and C. Lett, "Connectivity between seamounts and coastal ecosystems in the Southwestern Indian Ocean," Deep sea research part ii: topical studies in oceanography, vol. 176, p. 104774, 2020.
    [Bibtex] 
    @article{crocheletConnectivitySeamountsCoastal2020,
title = {Connectivity between Seamounts and Coastal Ecosystems in the {{Southwestern Indian Ocean}}},
author = {Crochelet, Estelle and Barrier, Nicolas and Andrello, Marco and Marsac, Francis and Spadone, Aur{\'e}lie and Lett, Christophe},
year = 2020,
month = jun,
journal = {Deep Sea Research Part II: Topical Studies in Oceanography},
series = {Bio-{{Physical}} Coupling around Three Shallow Seamounts in the {{South Western Indian Ocean}}, with Regional Comparisons Based on Modelling, Remote Sensing and Observational Studies},
volume = {176},
pages = {104774},
issn = {0967-0645},
doi = {10.1016/j.dsr2.2020.104774},
urldate = {2021-03-25},
abstract = {Understanding larval connectivity patterns is critical for marine spatial planning, particularly for designing marine protected areas and managing fisheries. Patterns of larval dispersal and connectivity can be inferred from numerical transport models at large spatial and temporal scales. We assess model-based connectivity patterns between seamounts of the Southwestern Indian Ocean (SWIO) and the coastal ecosystems of Mauritius, La R\'eunion, Madagascar, Mozambique and South Africa, with emphasis on three shallow seamounts (La P\'erouse [LP], MAD-Ridge [MR] and Walters Shoal [WS]). Using drifter trajectory and a Lagrangian model of ichthyoplankton dispersal, we show that larvae can undertake very long dispersion, with larval distances increasing with pelagic larval duration (PLD). There are three groups of greater connectivity: the region between the eastern coast of Madagascar, Mauritius and La R\'eunion islands; the seamounts of the South West Indian Ridge; and the pair formed by WS and a nearby un-named seamount. Connectivity between these three groups is evident only for the longest PLD examined (360~d). Connectivity from seamounts to coastal ecosystems is weak, with a maximum of 2\% of larvae originating from seamounts reaching coastal ecosystems. Local retention at the three focal seamounts (LP, MR and WS) peaks at about 11\% for the shortest PLD considered (15~d) at the most retentive seamount (WS) and decreases sharply with increasing PLD. Information on PLD and age of larvae collected at MR and LP are used to assess their putative origin. These larvae are likely self-recruits but it is also plausible that they immigrate from nearby coastal sites, i.e. the southern coast of Madagascar for MR and the islands of La R\'eunion and Mauritius for LP.},
langid = {english},
keywords = {Biophysical model,Connectivity,Ichthyop,Lagrangian modelling,Larval drift,Larval duration,Seamounts,Southwestern indian ocean,Surface drifters},
file = {/home/BARRIER/Zotero/storage/LUDV2U37/Crochelet et al. - 2020 - Connectivity between seamounts and coastal ecosyst.pdf;/home/BARRIER/Zotero/storage/L2QE3H8T/S0967064519301080.html}
}
  • [DOI] C. Fu, Y. Xu, C. Guo, N. Olsen, A. Grüss, H. Liu, N. Barrier, P. Verley, and Y. Shin, "The Cumulative Effects of Fishing, Plankton Productivity, and Marine Mammal Consumption in a Marine Ecosystem," Frontiers in marine science, vol. 7, 2020.
    [Bibtex] 
    @article{fuCumulativeEffectsFishing2020,
title = {The {{Cumulative Effects}} of {{Fishing}}, {{Plankton Productivity}}, and {{Marine Mammal Consumption}} in a {{Marine Ecosystem}}},
author = {Fu, Caihong and Xu, Yi and Guo, Chuanbo and Olsen, Norm and Gr{\"u}ss, Arnaud and Liu, Huizhu and Barrier, Nicolas and Verley, Philippe and Shin, Yunne-Jai},
year = 2020,
journal = {Frontiers in Marine Science},
volume = {7},
publisher = {Frontiers},
issn = {2296-7745},
doi = {10.3389/fmars.2020.565699},
urldate = {2021-01-05},
abstract = {The marine ecosystem off British Columbia (BC), Canada, has experienced various changes in the last two decades. Understanding how stressors interactively and cumulatively affect commercially important fish species is key to moving towards ecosystem-based fisheries management. Because it is challenging to assess the cumulative effects of multiple stressors by using empirical data alone, a dynamic, individual-based spatially-explicit ecosystem modeling platform such as OSMOSE represents a valuable tool to simulate ecological processes and comprehensively evaluate how stressors cumulatively impact modelled species. In this study, we employed OSMOSE to investigate the cumulative effects of fishing, plankton biomass change, and marine mammal consumption on the dynamics of some fish species and the BC marine ecosystem as a whole. We specifically simulated ecosystem dynamics during the last 20 years under two sets of scenarios: (1) unfavorable conditions from the perspective of commercial fish species (i.e., doubling fishing rates, halving plankton biomass, and doubling marine mammal biomass, acting individually or collectively); and (2) favorable conditions with the three factors having opposite changes (i.e., halving fishing rates, doubling plankton biomass, and halving marine mammal biomass, acting individually or collectively). Our results indicate that, under unfavorable conditions, the degree to which species biomass was reduced varied among species, and that negative synergistic and negative dampened effects were dominant under historical and doubled fishing mortality rates, respectively. Under favorable conditions, species biomasses did not increase as much as expected due to the existence of complex predator-prey interactions among fish species, and positive synergistic and positive dampened effects were prevailing under historical and halved fishing mortality rates, respectively. The ecosystem total biomass and the biomass to fisheries yield ratio were found to be good ecological indicators to represent ecosystem changes and track the impacts from the multiple drivers of change. Our research provides insights on how fisheries management should adapt to prepare for potential future impacts of climate change.},
langid = {english},
keywords = {Cumulative effect,Ecological indicator,Ecosystem Modeling,Ecosystem-based fisheries management,Synergism},
file = {/home/BARRIER/Zotero/storage/83TXU3HR/Fu et al. - 2020 - The Cumulative Effects of Fishing, Plankton Produc.pdf;/home/BARRIER/Zotero/storage/CNHWWC73/Fu et al. - 2020 - The Cumulative Effects of Fishing, Plankton Produc.pdf;/home/BARRIER/Zotero/storage/V53YGE2H/Fu et al. - 2020 - The Cumulative Effects of Fishing, Plankton Produc.pdf}
}
  • [DOI] C. Lett, N. Barrier, and M. Bahlali, "Converging approaches for modeling the dispersal of propagules in air and sea," Ecological modelling, vol. 415, p. 108858, 2020.
    [Bibtex] 
    @article{lettConvergingApproachesModeling2020,
title = {Converging Approaches for Modeling the Dispersal of Propagules in Air and Sea},
author = {Lett, Christophe and Barrier, Nicolas and Bahlali, Meissam},
year = 2020,
month = jan,
journal = {Ecological Modelling},
volume = {415},
pages = {108858},
issn = {0304-3800},
doi = {10.1016/j.ecolmodel.2019.108858},
urldate = {2021-01-05},
abstract = {Terrestrial plants seeds, spores and pollen are often dispersed by wind. Likewise, most eggs and larvae of marine organisms are dispersed by oceanic currents. It was historically believed that the spatial scale at which dispersal occurs was orders of magnitude smaller for plants than for fish. However, recent empirical estimates of seed and larval dispersal suggest that these dispersal scales are more alike than previously thought. The modeling approaches used to simulate aerial and aquatic dispersal are also converging. Similar biophysical models are developed, in which outputs of Eulerian models simulating the main physical forcing mechanism (wind or currents) are used as inputs to Lagrangian models that include biological components (such as seed terminal velocity or larval vertical migration). These biophysical models are then used to simulate trajectories of the biological entities (seeds, larvae) in three dimensions. We reflect on these converging trends by first putting them into an historical perspective, and then by comparing the physical and biological processes represented in marine larva vs. terrestrial seed dispersal models, the data used for the models output corroboration, and the tools available to perform simulations. We conclude that this convergence offers the opportunity to bridge the gap between two scientific communities which are currently largely disconnected. More broadly, we also see our comparison across systems as a useful way to strengthen the links between aquatic and terrestrial ecology by sharing knowledge, methods, tools, and concepts.},
langid = {english},
keywords = {Aerial dispersal,Aquatic dispersal,Atmospheric dispersal,Biophysical model,Eulerian model,Lagrangian model,Marine dispersal,Oceanic dispersal,Propagule dispersal,Wind dispersal},
file = {/home/BARRIER/Zotero/storage/F3CNLN8H/Lett et al. - 2020 - Converging approaches for modeling the dispersal o.pdf;/home/BARRIER/Zotero/storage/NB4E9P32/Lett et al. - 2020 - Converging approaches for modeling the dispersal o.pdf}
}
  • [DOI] R. Pagès, M. Baklouti, N. Barrier, M. Ayache, F. Sevault, S. Somot, and T. Moutin, "Projected Effects of Climate-Induced Changes in Hydrodynamics on the Biogeochemistry of the Mediterranean Sea Under the RCP 8.5 Regional Climate Scenario," Frontiers in marine science, vol. 7, 2020.
    [Bibtex] 
    @article{pagesProjectedEffectsClimateInduced2020,
title = {Projected {{Effects}} of {{Climate-Induced Changes}} in {{Hydrodynamics}} on the {{Biogeochemistry}} of the {{Mediterranean Sea Under}} the {{RCP}} 8.5 {{Regional Climate Scenario}}},
author = {Pag{\`e}s, R{\'e}mi and Baklouti, Melika and Barrier, Nicolas and Ayache, Mohamed and Sevault, Florence and Somot, Samuel and Moutin, Thierry},
year = 2020,
journal = {Frontiers in Marine Science},
volume = {7},
publisher = {Frontiers},
issn = {2296-7745},
doi = {10.3389/fmars.2020.563615},
urldate = {2021-01-05},
abstract = {The Mediterranean region has been shown to be particularly exposed to climate change, with observed trends that are more pronounced than the global tendency. In forecast studies based on a RCP 8.5 scenario, there seems to be a consensus that, along with an increase in temperature and salinity over the next century, a reduction in the intensity of deep-water formation and a shallowing of the mixed layer (especially in the North-Western Mediterranean Sea (MS)) are expected. By contrast, only a few studies have investigated the effects of climate change on the biogeochemistry of the MS using a 3D physical/biogeochemical model. In this study, our aim was to explore the impact of the variations in hydrodynamic forcing induced by climate change on the biogeochemistry of the MS over the next century. For this purpose, high-resolution simulations under the RCP 8.5 emission scenario have been run using the regional climate system model CNRM-RCSM4 including the NEMO-MED8 marine component, coupled (off-line) with the biogeochemical model Eco3M-Med. The results of this scenario first highlight that most of the changes in the biogeochemistry of the MS will occur (under the RCP 8.5 scenario) after 2050. They suggest that the MS will become increasingly oligotrophic, and therefore less and less productive (14 \% decrease in integrated primary production in the Western Basin and in the Eastern Basin). Significant changes would also occur in the planktonic food web, with a reduction (22 \% in the Western Basin and 38 \% in the Eastern Basin) of large phytoplankton species abundance in favour of small organisms. Organisms will also be more and more N-limited in the future since NO3 concentrations are expected to decline more than those of PO4 in the surface layer. All these changes would mainly concern the Western Basin, while the Eastern Basin would be less impacted.},
langid = {english},
keywords = {biogeochemistry,Climate Change,Coupled hydrodynamic-biogeochemical model,Mediterranean Sea,RCP scenario},
file = {/home/BARRIER/Zotero/storage/2SRCF4XE/Pagès et al. - 2020 - Projected Effects of Climate-Induced Changes in Hy.pdf;/home/BARRIER/Zotero/storage/V3Y2Q3YC/Pagès et al. - 2020 - Projected Effects of Climate-Induced Changes in Hy.pdf;/home/BARRIER/Zotero/storage/XLCHCELW/Pagès et al. - 2020 - Projected Effects of Climate-Induced Changes in Hy.pdf}
}
  • [DOI] A. Tagliabue, N. Barrier, H. D. Pontavice, L. Kwiatkowski, O. Aumont, L. Bopp, W. W. L. Cheung, D. Gascuel, and O. Maury, "An iron cycle cascade governs the response of equatorial Pacific ecosystems to climate change," Global change biology, vol. 26, iss. 11, p. 6168–6179, 2020.
    [Bibtex] 
    @article{tagliabueIronCycleCascade2020,
title = {An Iron Cycle Cascade Governs the Response of Equatorial {{Pacific}} Ecosystems to Climate Change},
author = {Tagliabue, Alessandro and Barrier, Nicolas and Pontavice, Hubert Du and Kwiatkowski, Lester and Aumont, Olivier and Bopp, Laurent and Cheung, William W. L. and Gascuel, Didier and Maury, Olivier},
year = 2020,
journal = {Global Change Biology},
volume = {26},
number = {11},
pages = {6168--6179},
issn = {1365-2486},
doi = {10.1111/gcb.15316},
urldate = {2021-01-05},
abstract = {Earth System Models project that global climate change will reduce ocean net primary production (NPP), upper trophic level biota biomass and potential fisheries catches in the future, especially in the eastern equatorial Pacific. However, projections from Earth System Models are undermined by poorly constrained assumptions regarding the biological cycling of iron, which is the main limiting resource for NPP over large parts of the ocean. In this study, we show that the climate change trends in NPP and the biomass of upper trophic levels are strongly affected by modifying assumptions associated with phytoplankton iron uptake. Using a suite of model experiments, we find 21st century climate change impacts on regional NPP range from -12.3\% to +2.4\% under a high emissions climate change scenario. This wide range arises from variations in the efficiency of iron retention in the upper ocean in the eastern equatorial Pacific across different scenarios of biological iron uptake, which affect the strength of regional iron limitation. Those scenarios where nitrogen limitation replaced iron limitation showed the largest projected NPP declines, while those where iron limitation was more resilient displayed little future change. All model scenarios have similar skill in reproducing past inter-annual variations in regional ocean NPP, largely due to limited change in the historical period. Ultimately, projections of end of century upper trophic level biomass change are altered by 50\%--80\% across all plausible scenarios. Overall, we find that uncertainties in the biological iron cycle cascade through open ocean pelagic ecosystems, from plankton to fish, affecting their evolution under climate change. This highlights additional challenges to developing effective conservation and fisheries management policies under climate change.},
copyright = {\copyright{} 2020 The Authors. Global Change Biology published by John Wiley \& Sons Ltd},
langid = {english},
keywords = {climate change,iron,marine ecosystems,net primary production,ocean},
file = {/home/BARRIER/Zotero/storage/5JDRZ9ZT/Tagliabue et al. - 2020 - An iron cycle cascade governs the response of equa.pdf;/home/BARRIER/Zotero/storage/Q4ZG6BKW/Tagliabue et al. - 2020 - An iron cycle cascade governs the response of equatorial Pacific ecosystems to climate change.pdf;/home/BARRIER/Zotero/storage/U56TMSAK/Tagliabue et al. - 2020 - An iron cycle cascade governs the response of equa.pdf}
}

2019

  • [DOI] F. Briton, L. Shannon, N. Barrier, P. Verley, and Y. Shin, "Reference levels of ecosystem indicators at multispecies maximum sustainable yield," Ices journal of marine science, vol. 76, iss. 7, p. 2070–2081, 2019.
    [Bibtex] 
    @article{britonReferenceLevelsEcosystem2019,
title = {Reference Levels of Ecosystem Indicators at Multispecies Maximum Sustainable Yield},
author = {Briton, Florence and Shannon, Lynne and Barrier, Nicolas and Verley, Philippe and Shin, Yunne-Jai},
year = 2019,
month = dec,
journal = {ICES Journal of Marine Science},
volume = {76},
number = {7},
pages = {2070--2081},
issn = {1054-3139},
doi = {10.1093/icesjms/fsz104},
urldate = {2021-03-25},
abstract = {We investigate reference points for ecosystem indicators in support of an Ecosystem Approach to Fishery. In particular, we assess indicator capacity to detect when the Multispecies Maximum Sustainable Yield (MMSY) is reached, under a wide range of multispecies fishing strategies. The analysis was carried out using a simulation approach based on the ecosystem model OSMOSE in the southern Benguela. We show that the 13 ecosystem indicators have reference points at MMSY that are highly variable across fishing strategies. The state of the ecosystem at MMSY is so variable across fishing strategies that it is not possible to set reference points without considering the fishing strategy. However, strategy-specific reference points were found to constitute robust proxies for MMSY in more than 90\% of the simulated fishing strategies. For instance, under the current fishing strategy in the southern Benguela, robust reference points at MMSY could be identified for the following indicators: mean length of fish, mean lifespan, biomass over catch ratio, trophic level of the surveys, mean trophic index, proportion of predatory fish, intrinsic vulnerability index, and mean maximum length.},
file = {/home/BARRIER/Zotero/storage/K59E97H7/Briton et al. - 2019 - Reference levels of ecosystem indicators at multispecies maximum sustainable yield.pdf;/home/BARRIER/Zotero/storage/KSGLMB9L/Briton et al. - 2019 - Reference levels of ecosystem indicators at multis.pdf}
}
  • [DOI] A. Grüss, M. L. D. Palomares, J. H. Poelen, J. R. Barile, C. D. Aldemita, S. R. Ortiz, N. Barrier, Y. Shin, J. Simons, and D. Pauly, "Building bridges between global information systems on marine organisms and ecosystem models," Ecological modelling, vol. 398, p. 1–19, 2019.
    [Bibtex] 
    @article{grussBuildingBridgesGlobal2019,
title = {Building Bridges between Global Information Systems on Marine Organisms and Ecosystem Models},
author = {Gr{\"u}ss, Arnaud and Palomares, Maria L. D. and Poelen, Jorrit H. and Barile, Josephine R. and Aldemita, Casey D. and Ortiz, Shelumiel R. and Barrier, Nicolas and Shin, Yunne-Jai and Simons, James and Pauly, Daniel},
year = 2019,
month = apr,
journal = {Ecological Modelling},
volume = {398},
pages = {1--19},
issn = {0304-3800},
doi = {10.1016/j.ecolmodel.2019.01.023},
urldate = {2020-01-03},
abstract = {To facilitate the wider implementation of ecosystem modeling platforms and, thereby, to help advance ecosystem-based fisheries management (EBFM) worldwide, tools delivering a large quantity of inputs to ecosystem models are needed. We developed a web application providing OSMOSE ecosystem models with values for trophic, growth and reproduction parameters derived from data from two global information systems (FishBase and SeaLifeBase). Our web application guides the user through simple queries to extract information from FishBase and SeaLifeBase data archives, and it delivers all the configuration files necessary for running an OSMOSE model. Here, we present our web application and demonstrate it for the West Florida Shelf ecosystem. Our software architecture can serve as a basis for designing other advanced web applications using FishBase and SeaLifeBase data in support of EBFM.},
langid = {english},
keywords = {Ecosystem model,FishBase,OSMOSE,SeaLifeBase,Web application,Web application programming interface},
file = {/home/BARRIER/Zotero/storage/4S29TARN/Grüss et al. - 2019 - Building bridges between global information system.pdf;/home/BARRIER/Zotero/storage/745KAZ5P/Grüss et al. - 2019 - Building bridges between global information system.pdf;/home/BARRIER/Zotero/storage/247ZD76G/S0304380019300432.html;/home/BARRIER/Zotero/storage/7V7TQJ8J/S0304380019300432.html;/home/BARRIER/Zotero/storage/YQAU5PM3/S0304380019300432.html}
}
  • [DOI] C. Lett, N. Barrier, Y. Ourmières, C. Petit, M. Labonne, J. Bourjea, and A. M. Darnaude, "Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean Sea," Marine environmental research, vol. 152, p. 104781, 2019.
    [Bibtex] 
    @article{lettModelingLarvalDispersal2019,
title = {Modeling Larval Dispersal for the Gilthead Seabream in the Northwestern {{Mediterranean Sea}}},
author = {Lett, Christophe and Barrier, Nicolas and Ourmi{\`e}res, Yann and Petit, C{\'e}cile and Labonne, Maylis and Bourjea, J{\'e}r{\^o}me and Darnaude, Audrey M.},
year = 2019,
month = dec,
journal = {Marine Environmental Research},
volume = {152},
pages = {104781},
issn = {0141-1136},
doi = {10.1016/j.marenvres.2019.104781},
urldate = {2021-03-25},
abstract = {To investigate dispersal and connectivity between spawning and lagoon nursery habitats of the gilthead seabream, Sparus aurata, in the Gulf of Lions (northwestern Mediterranean Sea), we modeled the potential transport of the species' larvae between its supposed main spawning site in the region (the Planier Island) and two of its main local nursery areas (the coastal lagoons of Thau and Salses-Leucate). Passive larval drift simulations using a dispersal biophysical model showed a large variability in the possible trajectories from spawning to nursery areas and in the predicted ages for larvae arrival on the two nursery sites. The most common ages at arrival obtained in the simulations (20--60 days) are broadly consistent with previous modeling studies but contrast with the actual ages of the S. aurata post-larvae collected in 2016 and 2017\,at time of the lagoon entrances (60--90 days, from otolith readings). The period between 25 and 70 days being critical for gilthead seabream larvae to acquire sufficient swimming, osmoregulatory, and olfactory abilities to enter coastal lagoons, we argue that ontogenic development plays a crucial role in the transport and local retention of S. aurata larvae in the studied region, explaining the discrepancy between simulation results and observed data.},
langid = {english},
keywords = {Biophysical model,Connectivity,Fish,Gulf of Lions,Larvae,Models-hydrodynamic,Otolith},
file = {/home/BARRIER/Zotero/storage/72SS87RI/Lett et al. - 2019 - Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean Sea.pdf;/home/BARRIER/Zotero/storage/KMPV7644/Lett et al. - 2019 - Modeling larval dispersal for the gilthead seabrea.pdf}
}
  • [DOI] H. K. Lotze, D. P. Tittensor, A. {Bryndum-Buchholz}, T. D. Eddy, W. W. L. Cheung, E. D. Galbraith, M. Barange, N. Barrier, D. Bianchi, J. L. Blanchard, L. Bopp, M. Büchner, C. M. Bulman, D. A. Carozza, V. Christensen, M. Coll, J. P. Dunne, E. A. Fulton, S. Jennings, M. C. Jones, S. Mackinson, O. Maury, S. Niiranen, R. {Oliveros-Ramos}, T. Roy, J. A. Fernandes, J. Schewe, Y. Shin, T. A. M. Silva, J. Steenbeek, C. A. Stock, P. Verley, J. Volkholz, N. D. Walker, and B. Worm, "Global ensemble projections reveal trophic amplification of ocean biomass declines with climate change," Proceedings of the national academy of sciences, vol. 116, iss. 26, p. 12907–12912, 2019.
    [Bibtex] 
    @article{lotzeGlobalEnsembleProjections2019,
title = {Global Ensemble Projections Reveal Trophic Amplification of Ocean Biomass Declines with Climate Change},
author = {Lotze, Heike K. and Tittensor, Derek P. and {Bryndum-Buchholz}, Andrea and Eddy, Tyler D. and Cheung, William W. L. and Galbraith, Eric D. and Barange, Manuel and Barrier, Nicolas and Bianchi, Daniele and Blanchard, Julia L. and Bopp, Laurent and B{\"u}chner, Matthias and Bulman, Catherine M. and Carozza, David A. and Christensen, Villy and Coll, Marta and Dunne, John P. and Fulton, Elizabeth A. and Jennings, Simon and Jones, Miranda C. and Mackinson, Steve and Maury, Olivier and Niiranen, Susa and {Oliveros-Ramos}, Ricardo and Roy, Tilla and Fernandes, Jos{\'e} A. and Schewe, Jacob and Shin, Yunne-Jai and Silva, Tiago A. M. and Steenbeek, Jeroen and Stock, Charles A. and Verley, Philippe and Volkholz, Jan and Walker, Nicola D. and Worm, Boris},
year = 2019,
month = jun,
journal = {Proceedings of the National Academy of Sciences},
volume = {116},
number = {26},
pages = {12907--12912},
publisher = {National Academy of Sciences},
issn = {0027-8424, 1091-6490},
doi = {10.1073/pnas.1900194116},
urldate = {2021-01-27},
abstract = {While the physical dimensions of climate change are now routinely assessed through multimodel intercomparisons, projected impacts on the global ocean ecosystem generally rely on individual models with a specific set of assumptions. To address these single-model limitations, we present standardized ensemble projections from six global marine ecosystem models forced with two Earth system models and four emission scenarios with and without fishing. We derive average biomass trends and associated uncertainties across the marine food web. Without fishing, mean global animal biomass decreased by 5\% (\textpm 4\% SD) under low emissions and 17\% (\textpm 11\% SD) under high emissions by 2100, with an average 5\% decline for every 1 {$^\circ$}C of warming. Projected biomass declines were primarily driven by increasing temperature and decreasing primary production, and were more pronounced at higher trophic levels, a process known as trophic amplification. Fishing did not substantially alter the effects of climate change. Considerable regional variation featured strong biomass increases at high latitudes and decreases at middle to low latitudes, with good model agreement on the direction of change but variable magnitude. Uncertainties due to variations in marine ecosystem and Earth system models were similar. Ensemble projections performed well compared with empirical data, emphasizing the benefits of multimodel inference to project future outcomes. Our results indicate that global ocean animal biomass consistently declines with climate change, and that these impacts are amplified at higher trophic levels. Next steps for model development include dynamic scenarios of fishing, cumulative human impacts, and the effects of management measures on future ocean biomass trends.},
chapter = {Biological Sciences},
copyright = {Copyright \copyright{} 2019 the Author(s). Published by PNAS.. https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).},
langid = {english},
pmid = {31186360},
keywords = {climate change impacts,global ecosystem modeling,marine food webs,model intercomparison,uncertainty},
file = {/home/BARRIER/Zotero/storage/CXFP2H9K/Lotze et al. - 2019 - Global ensemble projections reveal trophic amplifi.pdf;/home/BARRIER/Zotero/storage/XDZI2SJ7/Lotze et al. - 2019 - Global ensemble projections reveal trophic amplifi.pdf;/home/BARRIER/Zotero/storage/DM4GHTMN/12907.html;/home/BARRIER/Zotero/storage/RF83Z6NN/12907.html}
}
  • [DOI] F. Moullec, L. Velez, P. Verley, N. Barrier, C. Ulses, P. Carbonara, A. Esteban, C. Follesa, M. Gristina, A. Jadaud, A. Ligas, E. L. Díaz, P. Maiorano, P. Peristeraki, M. T. Spedicato, I. Thasitis, M. Valls, F. Guilhaumon, and Y. Shin, "Capturing the big picture of Mediterranean marine biodiversity with an end-to-end model of climate and fishing impacts," Progress in oceanography, vol. 178, p. 102179, 2019.
    [Bibtex] 
    @article{moullecCapturingBigPicture2019,
title = {Capturing the Big Picture of {{Mediterranean}} Marine Biodiversity with an End-to-End Model of Climate and Fishing Impacts},
author = {Moullec, Fabien and Velez, Laure and Verley, Philippe and Barrier, Nicolas and Ulses, Caroline and Carbonara, Pierluigi and Esteban, Antonio and Follesa, Cristina and Gristina, Michele and Jadaud, Ang{\'e}lique and Ligas, Alessandro and D{\'i}az, Eduardo L{\'o}pez and Maiorano, Porzia and Peristeraki, Panagiota and Spedicato, Maria Teresa and Thasitis, Ioannis and Valls, Maria and Guilhaumon, Fran{\c c}ois and Shin, Yunne-Jai},
year = 2019,
month = nov,
journal = {Progress in Oceanography},
volume = {178},
pages = {102179},
issn = {0079-6611},
doi = {10.1016/j.pocean.2019.102179},
urldate = {2020-01-03},
abstract = {The Mediterranean Sea is one of the main hotspots of marine biodiversity in the world. The combined pressures of fishing activity and climate change have also made it a hotspot of global change amidst increasing concern about the worsening status of exploited marine species. To anticipate the impacts of global changes in the Mediterranean Sea, more integrated modelling approaches are needed, which can then help policymakers prioritize management actions and formulate strategies to mitigate impacts and adapt to changes. The aim of this study was to develop a holistic model of marine biodiversity in the Mediterranean Sea with an explicit representation of the spatial, multispecies dynamics of exploited resources subject to the combined influence of climate variability and fishing pressure. To this end, we used the individual-based OSMOSE model (Object-oriented Simulator of Marine ecOSystEms), including 100 marine species (fish, cephalopods and crustaceans) representing about 95\% of the total declared catch, at a high spatial resolution (400\,km2) and a large spatial scale (the entire Mediterranean basin) -- the first time such a resolution and scale have been modelled. We then combined OSMOSE with the NEMOMED 12 physical model and the Eco3M-S biogeochemical low trophic level model to build the end-to-end model, OSMOSE-MED. We fitted OSMOSE-MED model with observed or estimated biomass and commercial catch data using a likelihood approach and an evolutionary optimization algorithm. The outputs of OSMOSE-MED were then verified against observed biomass and catch data, and compared with independent datasets (MEDITS data, diet composition and trophic levels). The model results -- at different hierarchical levels, from individuals to the scale of the ecosystem -- were consistent with current knowledge of the structure, functioning and dynamics of the ecosystems in the Mediterranean Sea. While the model could be further improved in future iterations, all the modelling steps -- the comprehensive representation of key ecological processes and feedback, the selective parameterization of the model, and the comparison with observed data in the validation process -- strengthened the predictive performance of OSMOSE-MED and thus its relevance as an impact model to explore the future of marine biodiversity under scenarios of global change. It is a promising tool to support ecosystem-based fishery management in the Mediterranean Sea.},
langid = {english},
keywords = {Eco3M-S model,Ecosystem Approach to Fisheries Management,Ecosystem model,Global change,NEMOMED model,OSMOSE model},
file = {/home/BARRIER/Zotero/storage/H8ZNTSVD/Moullec et al. - 2019 - Capturing the big picture of Mediterranean marine .pdf;/home/BARRIER/Zotero/storage/JP7ZDB6G/S0079661118303537.html}
}
  • [DOI] F. Moullec, N. Barrier, S. Drira, F. Guilhaumon, P. Marsaleix, S. Somot, C. Ulses, L. Velez, and Y. Shin, "An End-to-End Model Reveals Losers and Winners in a Warming Mediterranean Sea," Frontiers in marine science, vol. 6, 2019.
    [Bibtex] 
    @article{moullecEndtoEndModelReveals2019,
title = {An {{End-to-End Model Reveals Losers}} and {{Winners}} in a {{Warming Mediterranean Sea}}},
author = {Moullec, Fabien and Barrier, Nicolas and Drira, Sabrine and Guilhaumon, Fran{\c c}ois and Marsaleix, Patrick and Somot, Samuel and Ulses, Caroline and Velez, Laure and Shin, Yunne-Jai},
year = 2019,
journal = {Frontiers in Marine Science},
volume = {6},
issn = {2296-7745},
doi = {10.3389/fmars.2019.00345},
urldate = {2020-01-03},
abstract = {The Mediterranean Sea is now recognized as a hotspot of global change, ranking among the fastest warming ocean regions. In order to project future plausible scenarios of marine biodiversity at the scale of the whole Mediterranean basin, the current challenge is to develop an explicit representation of the multispecies spatial dynamics under the combined influence of fishing pressure and climate change. Notwithstanding the advanced state-of-the-art modelling of food webs in the region, no previous studies have projected the consequences of climate change on marine ecosystems in an integrated way, considering changes in ocean dynamics, in phyto- and zoo-plankton productions, shifts in Mediterranean species distributions and their trophic interactions at the whole basin scale. We used an integrated modelling chain including a high-resolution regional climate model, a regional biogeochemistry model and a food web model OSMOSE to project the potential effects of climate change on biomass and catches for a wide array of species in the Mediterranean Sea. We showed that projected climate change would have large consequences for marine biodiversity by the end of the 21st century under a business-as-usual scenario (RCP8.5 with current fishing mortality). The total biomass of high trophic level species (fish and macroinvertebrates) is projected to increase by 5\% and 22\% while total catch is projected to increase by 0.3\% and 7\% by 2021-2050 and 2071-2100, respectively. However, these global increases masked strong spatial and inter-species contrasts. The bulk of increase in catch and biomass would be located in the southeastern part of the basin while total catch could decrease by up to 23\% in the western part. Winner species would mainly belong to the pelagic group, are thermophilic and/or exotic, of smaller size and of low trophic level while loser species are generally large-sized, some of them of great commercial interest, and could suffer from a spatial mismatch with potential prey subsequent to a contraction or shift of their geographic range. Given the already poor conditions of exploited resources, our results suggest the need for fisheries management to adapt to future changes and to incorporate climate change impacts in future management strategy evaluation.},
langid = {english},
keywords = {Biodiversity scenario,Climate Change,Ecosytem model,End-to-end model,Fishing,Mediterraenan sea,Osmose},
file = {/home/BARRIER/Zotero/storage/SQQ8RNQ2/Moullec et al. - 2019 - An End-to-End Model Reveals Losers and Winners in .pdf;/home/BARRIER/Zotero/storage/W4A2P56W/Moullec et al. - 2019 - An End-to-End Model Reveals Losers and Winners in .pdf}
}

2016

  • [DOI] N. Barrier, A. A. Petrenko, and Y. Ourmières, "Strong intrusions of the Northern Mediterranean Current on the eastern Gulf of Lion: insights from in-situ observations and high resolution numerical modelling," Ocean dynamics, vol. 66, iss. 3, p. 313–327, 2016.
    [Bibtex] 
    @article{barrierStrongIntrusionsNorthern2016,
title = {Strong Intrusions of the {{Northern Mediterranean Current}} on the Eastern {{Gulf}} of {{Lion}}: Insights from in-Situ Observations and High Resolution Numerical Modelling},
shorttitle = {Strong Intrusions of the {{Northern Mediterranean Current}} on the Eastern {{Gulf}} of {{Lion}}},
author = {Barrier, Nicolas and Petrenko, Anne A. and Ourmi{\`e}res, Yann},
year = 2016,
month = mar,
journal = {Ocean Dynamics},
volume = {66},
number = {3},
pages = {313--327},
issn = {1616-7341, 1616-7228},
doi = {10.1007/s10236-016-0921-7},
urldate = {2017-11-15},
abstract = {The Northern Mediterranean Current is the return branch of the cyclonic circulation of the northwestern Mediterranean Sea. Because of geostrophic constraints, this warm and oligotrophic current is forced to flow westward along the continental slope of the Gulf of Lion. But, occasionally, it penetrates on the shelf and strongly impacts the local biogeochemistry and in turn the primary production. By combining in situ observations and high-resolution modelling, it is shown that intrusions on the eastern part of the gulf are mainly forced by easterly or northwesterly wind events, through physical mechanisms that are very different in nature. Easterlies induce a piling of water along the Gulf of Lion coast that drives, through geostrophy, an alongshore shelf-intruding current. This intrusive current occurs independently of the stratification and is concomitant with the wind forcing. On the other hand, intrusions due to northwesterlies only occur during stratified conditions and are related to the development of upwellings along the Gulf of Lion coasts. When the upwelling develops, a northwestward alongshore pressure force balances the Coriolis force associated with the onshore flow at depth. When the winds drop, the upwelling relaxes and the onshore flow weakens. Consequently, the Coriolis force no longer counterbalances the pressure force that ultimately dominates the momentum balance, causing the displacement of the Northern Current on the Gulf of Lion shelf approximately 1 day after the wind relaxation. This time lag between the northwesterlies decrease and the intrusions permits to anticipate possible changes in the biogeochemistry of the Gulf of Lion.},
langid = {english},
keywords = {Cross-shelf exchanges,Easterlies,Gulf of Lion,Intrusions,Julio,Mistral,Northern Current,Northwesterlies,Tramontane,Upwelling,Wind-setup},
file = {/home/BARRIER/Zotero/storage/ZF5TZC7D/Barrier et al. - 2016 - Strong intrusions of the Northern Mediterranean Cu.pdf;/home/BARRIER/Zotero/storage/BXQJJ5KA/s10236-016-0921-7.html}
}

2015

  • [DOI] N. Barrier, J. Deshayes, A. Treguier, and C. Cassou, "Heat budget in the North Atlantic subpolar gyre: Impacts of atmospheric weather regimes on the 1995 warming event," Progress in oceanography, vol. 130, iss. Supplement C, p. 75–90, 2015.
    [Bibtex] 
    @article{barrierHeatBudgetNorth2015,
title = {Heat Budget in the {{North Atlantic}} Subpolar Gyre: {{Impacts}} of Atmospheric Weather Regimes on the 1995 Warming Event},
shorttitle = {Heat Budget in the {{North Atlantic}} Subpolar Gyre},
author = {Barrier, Nicolas and Deshayes, Julie and Treguier, Anne-Marie and Cassou, Christophe},
year = 2015,
month = jan,
journal = {Progress in Oceanography},
volume = {130},
number = {Supplement C},
pages = {75--90},
issn = {0079-6611},
doi = {10.1016/j.pocean.2014.10.001},
urldate = {2017-11-15},
abstract = {In the mid 1990s, the North Atlantic subpolar gyre has shown a dramatic warming event that has been thoroughly investigated from observations and numerical simulations. Some studies suggest that it was due to an interannual, wind-driven weakening and shrinking of the gyre that facilitated the penetration of warm Atlantic Water, the weakening of the gyre being attributed to changes in the North Atlantic Oscillation (NAO) and in the East Atlantic Pattern, which are the two dominant modes of atmospheric variability in the North Atlantic. However, other studies suggest that the warming event was due to a decadal, buoyancy-driven strengthening of the meridional overturning circulation and subsequent intensification of the poleward heat transport, in response to the positive NAO conditions of 1988--1995. To reconcile this discrepancy, the heat budget in the North Atlantic subpolar gyre is reconstructed from four ocean hindcast simulations sharing the same modelling platform but using different settings. The novelty of this work is the decomposition of the subpolar gyre into a western and an eastern subregion, which is motivated by water mass distribution around Reykjanes Ridge and by the fact that deep convection only occurs in the western subpolar gyre. In the western subpolar gyre, the 1995 warming event is the decadal, baroclinic ocean response to positive NAO conditions from 1988 to 1995. The latter induced increased surface heat loss in the Labrador Sea that intensified deep convection hence strengthened the meridional overturning circulation and the associated poleward heat transport. In the eastern subregion, a concomittant warming is induced by an interannual, barotropic adjustment of the gyre circulation to an abrupt switch from positive NAO conditions in winter 1995 to negative NAO conditions in winter 1996. Indeed, the gyre response to negative NAO conditions is a cyclonic intergyre-gyre that increases northward volume and heat transports at the southeastern limit of the subpolar gyre. Therefore, the discrepancies found in the literature about the 1995 warming event of the North Atlantic subpolar gyre are reconciled in the present work, which suggests that the atmospheric drivers, the mechanisms at stake and the associated timescales are different to the east and to the west of Reykjanes Ridge.},
file = {/home/BARRIER/Zotero/storage/U9J5NHEW/Barrier et al. - 2015 - Heat budget in the North Atlantic subpolar gyre Impacts of atmospheric weather regimes on the 1995.pdf;/home/BARRIER/Zotero/storage/XER43M9I/Barrier et al. - 2015 - Heat budget in the North Atlantic subpolar gyre I.pdf;/home/BARRIER/Zotero/storage/JJKSTUZS/S0079661114001645.html}
}

2014

  • [DOI] P. Tréguer, E. Goberville, N. Barrier, S. L'Helguen, P. Morin, Y. Bozec, P. {Rimmelin-Maury}, M. Czamanski, E. Grossteffan, T. Cariou, M. Répécaud, and L. Quéméner, "Large and local-scale influences on physical and chemical characteristics of coastal waters of Western Europe during winter," Journal of marine systems, vol. 139, p. 79–90, 2014.
    [Bibtex] 
    @article{treguerLargeLocalscaleInfluences2014,
title = {Large and Local-Scale Influences on Physical and Chemical Characteristics of Coastal Waters of {{Western Europe}} during Winter},
author = {Tr{\'e}guer, Paul and Goberville, Eric and Barrier, Nicolas and L'Helguen, St{\'e}phane and Morin, Pascal and Bozec, Yann and {Rimmelin-Maury}, Peggy and Czamanski, Marie and Grossteffan, Emilie and Cariou, Thierry and R{\'e}p{\'e}caud, Michel and Qu{\'e}m{\'e}ner, Loic},
year = 2014,
month = nov,
journal = {Journal of Marine Systems},
volume = {139},
pages = {79--90},
issn = {0924-7963},
doi = {10.1016/j.jmarsys.2014.05.019},
urldate = {2017-11-15},
abstract = {There is now a strong scientific consensus that coastal marine systems of Western Europe are highly sensitive to the combined effects of natural climate variability and anthropogenic climate change. However, it still remains challenging to assess the spatial and temporal scales at which climate influence operates. While large-scale hydro-climatic indices, such as the North Atlantic Oscillation (NAO) or the East Atlantic Pattern (EAP) and the weather regimes such as the Atlantic Ridge (AR), are known to be relevant predictors of physical processes, changes in coastal waters can also be related to local hydro-meteorological and geochemical forcing. Here, we study the temporal variability of physical and chemical characteristics of coastal waters located at about 48{$^\circ$}N over the period 1998--2013 using (1) sea surface temperature, (2) sea surface salinity and (3) nutrient concentration observations for two coastal sites located at the outlet of the Bay of Brest and off Roscoff, (4) river discharges of the major tributaries close to these two sites and (5) regional and local precipitation data over the region of interest. Focusing on the winter months, we characterize the physical and chemical variability of these coastal waters and document changes in both precipitation and river runoffs. Our study reveals that variability in coastal waters is connected to the large-scale North Atlantic atmospheric circulation but is also partly explained by local river influences. Indeed, while the NAO is strongly related to changes in sea surface temperature at the Brest and Roscoff sites, the EAP and the AR have a major influence on precipitations, which in turn modulate river discharges that impact sea surface salinity at the scale of the two coastal stations.},
keywords = {Climate variability,Coastal systems,Large-scale hydro-climatic indices,River inputs,Time-series,Weather regimes},
file = {/home/BARRIER/Zotero/storage/2WIM9GVV/Tréguer et al. - 2014 - Large and local-scale influences on physical and chemical characteristics of coastal waters of Weste.pdf;/home/BARRIER/Zotero/storage/5ARWVGIR/Tréguer et al. - 2014 - Large and local-scale influences on physical and c.pdf;/home/BARRIER/Zotero/storage/75X6ED92/S0924796314001481.html}
}

2013

  • [DOI] N. Barrier, A. Treguier, C. Cassou, and J. Deshayes, "Impact of the winter North-Atlantic weather regimes on subtropical sea-surface height variability," Climate dynamics, vol. 41, iss. 5-6, p. 1159–1171, 2013.
    [Bibtex] 
    @article{barrierImpactWinterNorthAtlantic2013,
title = {Impact of the Winter {{North-Atlantic}} Weather Regimes on Subtropical Sea-Surface Height Variability},
author = {Barrier, Nicolas and Treguier, Anne-Marie and Cassou, Christophe and Deshayes, Julie},
year = 2013,
month = sep,
journal = {Climate Dynamics},
volume = {41},
number = {5-6},
pages = {1159--1171},
issn = {0930-7575, 1432-0894},
doi = {10.1007/s00382-012-1578-7},
urldate = {2017-11-15},
abstract = {Interannual variability of subtropical sea-surface-height (SSH) anomalies, estimated by satellite and tide-gauge data, is investigated in relation to wintertime daily North-Atlantic weather regimes. Sea-level anomalies can be viewed as proxies for the subtropical gyre intensity because of the intrinsic baroclinic structure of the circulation. Our results show that the strongest correlation between SSH and weather regimes is found with the so-called Atlantic-Ridge (AR) while no significant values are obtained for the other regimes, including those related to the North Atlantic Oscillation (NAO), known as the primary actor of the Atlantic dynamics. Wintertime AR events are characterized by anticyclonic wind anomalies off Europe leading to a northward shift of the climatological wind-stress curl. The latter affects subtropical SSH annual variability by altered Sverdrup balance and ocean Rossby wave dynamics propagating westward from the African coast towards the Caribbean. The use of a simple linear planetary geostrophic model allows to quantify those effects and confirms the primary importance of the winter season to explain the largest part of SSH interannual variability in the Atlantic subtropical gyre. Our results open new perspectives in the comprehension of North-Atlantic Ocean variability emphasizing the role of AR as a driver of interannual variability at least of comparable importance to NAO.},
langid = {english},
keywords = {Atlantic Meridional Overturning Circulation,Baroclinic Mode,North Atlantic Oscillation,Subtropical Gyre,Weather Regime},
file = {/home/BARRIER/Zotero/storage/YX3AYMTM/Barrier et al. - 2013 - Impact of the winter North-Atlantic weather regime.pdf;/home/BARRIER/Zotero/storage/NDQL4L3Q/s00382-012-1578-7.html}
}
  • [DOI] N. Barrier, C. Cassou, J. Deshayes, and A. Treguier, "Response of North Atlantic Ocean Circulation to Atmospheric Weather Regimes," Journal of physical oceanography, vol. 44, iss. 1, p. 179–201, 2013.
    [Bibtex] 
    @article{barrierResponseNorthAtlantic2013,
title = {Response of {{North Atlantic Ocean Circulation}} to {{Atmospheric Weather Regimes}}},
author = {Barrier, Nicolas and Cassou, Christophe and Deshayes, Julie and Treguier, Anne-Marie},
year = 2013,
month = sep,
journal = {Journal of Physical Oceanography},
volume = {44},
number = {1},
pages = {179--201},
issn = {0022-3670},
doi = {10.1175/JPO-D-12-0217.1},
urldate = {2017-11-15},
abstract = {A new framework is proposed for investigating the atmospheric forcing of North Atlantic Ocean circulation. Instead of using classical modes of variability, such as the North Atlantic Oscillation (NAO) or the east Atlantic pattern, the weather regimes paradigm was used. Using this framework helped avoid problems associated with the assumptions of orthogonality and symmetry that are particular to modal analysis and known to be unsuitable for the NAO. Using ocean-only historical and sensitivity experiments, the impacts of the four winter weather regimes on horizontal and overturning circulations were investigated. The results suggest that the Atlantic Ridge (AR), negative NAO (NAO-), and positive NAO (NAO+) regimes induce a fast (monthly-to-interannual time scales) adjustment of the gyres via topographic Sverdrup dynamics and of the meridional overturning circulation via anomalous Ekman transport. The wind anomalies associated with the Scandinavian blocking regime (SBL) are ineffective in driving a fast wind-driven oceanic adjustment. The response of both gyre and overturning circulations to persistent regime conditions was also estimated. AR causes a strong, wind-driven reduction in the strengths of the subtropical and subpolar gyres, while NAO+ causes a strengthening of the subtropical gyre via wind stress curl anomalies and of the subpolar gyre via heat flux anomalies. NAO- induces a southward shift of the gyres through the southward displacement of the wind stress curl. The SBL is found to impact the subpolar gyre only via anomalous heat fluxes. The overturning circulation is shown to spin up following persistent SBL and NAO+ and to spin down following persistent AR and NAO- conditions. These responses are driven by changes in deep water formation in the Labrador Sea.},
keywords = {Atm/Ocean Structure/ Phenomena,Circulation/ Dynamics,Climate classification/regimes,Gyres,Meridional overturning circulation,Models and modeling,North Atlantic Oscillation,Ocean models,Physical Meteorology and Climatology,Wind},
file = {/home/BARRIER/Zotero/storage/R9IMHD78/Barrier et al. - 2013 - Response of North Atlantic Ocean Circulation to At.pdf;/home/BARRIER/Zotero/storage/YT4ES49G/Barrier et al. - 2014 - Response of North Atlantic Ocean Circulation to Atmospheric Weather Regimes.pdf;/home/BARRIER/Zotero/storage/59H3YVFZ/JPO-D-12-0217.html}
}

2012

  • [DOI] C. Hill, D. Ferreira, J. Campin, J. Marshall, R. Abernathey, and N. Barrier, "Controlling spurious diapycnal mixing in eddy-resolving height-coordinate ocean models – Insights from virtual deliberate tracer release experiments," Ocean modelling, vol. 45–46, iss. Supplement C, p. 14–26, 2012.
    [Bibtex] 
    @article{hillControllingSpuriousDiapycnal2012,
title = {Controlling Spurious Diapycnal Mixing in Eddy-Resolving Height-Coordinate Ocean Models -- {{Insights}} from Virtual Deliberate Tracer Release Experiments},
author = {Hill, Chris and Ferreira, David and Campin, Jean-Michel and Marshall, John and Abernathey, Ryan and Barrier, Nicolas},
year = 2012,
month = jan,
journal = {Ocean Modelling},
volume = {45--46},
number = {Supplement C},
pages = {14--26},
issn = {1463-5003},
doi = {10.1016/j.ocemod.2011.12.001},
urldate = {2017-11-15},
abstract = {A perceived limitation of z-coordinate models associated with spurious diapycnal mixing in eddying, frontal flow, can be readily addressed through appropriate attention to the tracer advection schemes employed. It is demonstrated that tracer advection schemes developed by Prather and collaborators for application in the stratosphere, greatly improve the fidelity of eddying flows, reducing levels of spurious diapycnal mixing to below those directly measured in field experiments, {$\sim$}1\texttimes 10-5m2s-1. This approach yields a model in which geostrophic eddies are quasi-adiabatic in the ocean interior, so that the residual-mean overturning circulation aligns almost perfectly with density contours. A reentrant channel configuration of the MIT General Circulation Model, that approximates the Antarctic Circumpolar Current, is used to examine these issues. Virtual analogs of ocean deliberate tracer release field experiments reinforce our conclusion, producing passive tracer solutions that parallel field experiments remarkably well.},
keywords = {Adiabatic,Advection,Diapyncnal mixing,Numerical mixing,Ocean modeling,Southern ocean},
file = {/home/BARRIER/Zotero/storage/HQGTDV2N/Hill et al. - 2012 - Controlling spurious diapycnal mixing in eddy-reso.pdf;/home/BARRIER/Zotero/storage/TGVRXMJD/Hill et al. - 2012 - Controlling spurious diapycnal mixing in eddy-resolving height-coordinate ocean models – Insights fr.pdf;/home/BARRIER/Zotero/storage/QTHP289V/S1463500311001880.html}
}
  • [DOI] N. Barrier, A. Treguier, C. Cassou, and J. Deshayes, "Influence des régimes de temps atmosphériques sur la circulation océanique de l'Atlantique Nord," La météorologie, vol. 2014, iss. 87, p. 38–44.
    [Bibtex] 
    @article{barrierInfluenceRegimesTemps,
title = {{Influence des r\'egimes de temps atmosph\'eriques sur la circulation oc\'eanique de l'Atlantique Nord}},
author = {Barrier, Nicolas and Treguier, Anne-Marie and Cassou, Christophe and Deshayes, Julie},
journal = {La M\'et\'eorologie},
volume = {2014},
number = {87},
pages = {38--44},
issn = {2107-0830},
doi = {10.4267/2042/54335},
urldate = {2026-03-20},
abstract = {Les r\'egimes de temps atmosph\'eriques constituent une alternative int\'eressante aux modes de variabilit\'e traditionnellement utilis\'es pour analyser l'influence de la variabilit\'e atmosph\'erique sur la circulation oc\'eanique en Atlantique Nord. Ils permettent en effet de prendre en consid\'eration l'asym\'etrie spatiale du mode de variabilit\'e dominant : l'oscillation nord-atlantique. \`A partir de simulations num\'eriques et d'observations mar\'egraphiques de hauteur de mer dynamique, l'influence des quatre r\'egimes de temps hivernaux sur les circulations oc\'eaniques horizontale et m\'eridienne est analys\'ee.},
langid = {french},
file = {/home/BARRIER/Zotero/storage/UDB3EBHQ/Barrier et al. - Influence des régimes de temps atmosphériques sur la circulation océanique de l'Atlantique Nord.pdf}
}