@article {9466, title = {An ecosystem-wide approach for assessing the spatialized cumulative effects of local and global changes on coastal ecosystem functioningAbstract}, journal = {ICES Journal of Marine Science}, volume = {80}, year = {2023}, month = {May-03-2025}, pages = {1129 - 1142}, issn = {1054-3139}, doi = {10.1093/icesjms/fsad043}, url = {https://academic.oup.com/icesjms/article/80/4/1129/7092991}, author = {Nogues, Quentin and Bourdaud, Pierre and Araignous, Emma and Halouani, Ghassen and Ben~Rais~Lasram, Frida and Dauvin, Jean-Claude and Le~Loc{\textquoteright}h, Fran{\c c}ois and Nathalie Niquil}, editor = {Coll, Marta} } @article {9393, title = {Influence of nutrient enrichment on colonisation and photosynthetic parameters of hard substrate marine microphytobenthos}, journal = {Biofouling}, year = {2023}, month = {Feb-10-2023}, pages = {1 - 18}, abstract = {This study aimed to assess the influence of nutrient enrichment on the development of microalgal biofilm on concrete and PVC cubes. Three mesocosms were utilized to create a nutrient gradient over a period of 28 days. Various parameters including biomass, photosynthetic activity, microtopography, and extracellular polymeric substances (EPS) were measured. Imaging PAM techniques were employed to obtain surface-wide data. Results revealed that nutrient availability had no significant impact on Chl a biomass and the maximum quantum efficiency of PSII (Fv/Fm). The photosynthetic capacity and efficiency were minimally affected by nutrient availability. Interestingly, the relationship between microphytobenthic (MPB) biomass and photosynthesis and surface rugosity exhibited distinct patterns. Negative reliefs showed a strong correlation with Fv/Fm, while no clear pattern emerged for biomass on rough concrete structures. Overall, our findings demonstrate that under conditions of heightened eutrophication, biofilm photosynthesis thrives in the fissures and crevasses of colonized structures regardless of nutrient levels. This investigation provides valuable insights into the interplay between nutrient availability and surface rugosity.}, issn = {0892-7014}, doi = {10.1080/08927014.2023.2261852}, url = {https://www.tandfonline.com/doi/full/10.1080/08927014.2023.2261852}, author = {Vivier, Baptiste and Faucheux-Bourlot, Caroline and Orvain, Francis and Chasselin, L{\'e}o and Jolly, Orianne and Navon, Maxime and Boutouil, Mohamed and Goux, Didier and Dauvin, Jean-Claude and Pascal Claquin} } @article {9465, title = {The usefulness of food web models in the ecosystem services framework: Quantifying, mapping, and linking services supply}, journal = {Ecosystem Services}, volume = {63}, year = {2023}, month = {Jan-10-2023}, pages = {101550}, issn = {22120416}, doi = {10.1016/j.ecoser.2023.101550}, url = {https://linkinghub.elsevier.com/retrieve/pii/S2212041623000438}, author = {Nogues, Quentin and Baulaz, Yoann and Clavel, Joanne and Araignous, Emma and Bourdaud, Pierre and Ben Rais Lasram, Frida and Dauvin, Jean-Claude and Girardin, Valerie and Halouani, Ghassen and Le Loc{\textquoteright}h, Francois and Loew-Turbout, Fr{\'e}d{\'e}rique and Raoux, Aurore and Nathalie Niquil} } @article {8735, title = {Colonisation of artificial structures by primary producers: competition and photosynthetic behaviour}, journal = {Biofouling}, year = {2022}, month = {Apr-06-2023}, pages = {1 - 14}, issn = {0892-7014}, doi = {10.1080/08927014.2022.2088285}, url = {https://www.tandfonline.com/doi/full/10.1080/08927014.2022.2088285}, author = {Vivier, Baptiste and Navon, Maxime and Dauvin, Jean-Claude and Chasselin, L{\'e}o and Deloor, Ma{\"e}l and Orvain, Francis and Rusig, Anne-Marie and Mussio, Isabelle and Boutouil, Mohamed and Pascal Claquin} } @article {8540, title = {A review of methods and indicators used to evaluate the ecological modifications generated by artificial structures on marine ecosystems}, journal = {Journal of Environmental Management}, volume = {310}, year = {2022}, month = {Jan-05-2022}, pages = {114646}, issn = {03014797}, doi = {10.1016/j.jenvman.2022.114646}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0301479722002195}, author = {Taormina, Bastien and Pascal Claquin and Vivier, Baptiste and Navon, Maxine and Pezy, Jean-Philippe and Raoux, Aurore and Dauvin, Jean-Claude} } @article {8833, title = {Spatialized ecological network analysis for ecosystem-based management: effects of climate change, marine renewable energy, and fishing on ecosystem functioning in the Bay of SeineAbstract}, journal = {ICES Journal of Marine Science}, volume = {79}, year = {2022}, month = {Dec-02-2023}, pages = {1098 - 1112}, issn = {1054-3139}, doi = {10.1093/icesjms/fsac026}, url = {https://academic.oup.com/icesjms/article/79/4/1098/6535870}, author = {Nogues, Quentin and Araignous, Emma and Bourdaud, Pierre and Halouani, Ghassen and Raoux, Aurore and Foucher, Eric and Loc{\textquoteright}h, Fran{\c c}ois Le and Loew-Turbout, Fr{\'e}d{\'e}rique and Ben~Rais~Lasram, Frida and Dauvin, Jean-Claude and Nathalie Niquil} } @article {8143, title = {Cumulative effects of marine renewable energy and climate change on ecosystem properties: Sensitivity of ecological network analysis}, journal = {Ecological Indicators}, volume = {121}, year = {2021}, month = {Jan-02-2021}, pages = {107128}, issn = {1470160X}, doi = {10.1016/j.ecolind.2020.107128}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1470160X20310670}, author = {Nogues, Quentin and Raoux, Aurore and Araignous, Emma and Chaalali, Aur{\'e}lie and Hattab, Tarek and Leroy, Boris and Ben Rais Lasram, Frida and David, Val{\'e}rie and Le Loc{\textquoteright}h, Francois and Dauvin, Jean-Claude and Nathalie Niquil} } @article {8349, title = {Four-Year Temporal Study of an Intertidal Artificial Structure in the English Channel}, journal = {Journal of Marine Science and Engineering}, volume = {9}, year = {2021}, month = {Jan-11-2021}, pages = {1174}, doi = {10.3390/jmse9111174}, url = {https://www.mdpi.com/2077-1312/9/11/1174}, author = {Dauvin, Jean-Claude and Deloor, Ma{\"e}l and Pezy, Jean-Philippe and Raoux, Aurore and Pascal Claquin and Foveau, Aur{\'e}lie} } @article {8109, title = {Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology}, journal = {Biofouling}, year = {2021}, month = {Apr-08-2022}, pages = {1 - 17}, issn = {0892-7014}, doi = {10.1080/08927014.2021.1959918}, url = {https://www.tandfonline.com/doi/full/10.1080/08927014.2021.1959918}, author = {Vivier, Baptiste and Pascal Claquin and Lelong, Christophe and Lesage, Quentin and Peccate, Mathias and Hamel, Bastien and Georges, Marine and Bourguiba, Amel and Sebaibi, Nassim and Boutouil, Mohamed and Goux, Didier and Dauvin, Jean-Claude and Francis Orvain} } @article {7854, title = {Marine artificial reefs, a meta-analysis of their design, objectives and effectiveness}, journal = {Global Ecology and Conservation}, year = {2021}, month = {Jan-03-2021}, pages = {e01538}, issn = {23519894}, doi = {10.1016/j.gecco.2021.e01538}, url = {https://linkinghub.elsevier.com/retrieve/pii/S2351989421000883}, author = {Vivier, Baptiste and Dauvin, Jean-Claude and Navon, Maxime and Anne-Marie Rusig and Isabelle Mussio and Francis Orvain and Boutouil, Mohamed and Pascal Claquin} } @article {LeGuen2019, title = {Assessing the ecological status of an estuarine ecosystem: linking biodiversity and food-web indicators}, journal = {Estuarine, Coastal and Shelf Science}, volume = {228}, year = {2019}, note = {cited By 0}, publisher = {Academic Press}, abstract = {During the last decades, the highly-anthropized Seine estuary has been impacted by modification of its habitats (building of a major extension of Le Havre harbour, i.e. Port2000) and a significant natural decrease in freshwater discharge. A Before/After analysis, using a toolbox of indicators, was applied to characterize the effects of both events on the estuarine ecosystem status. We selected from existing tool boxes several indicators derived from food web modelling or community composition data, such as biodiversity indicators, a guild-based index (i.e. Estuarine and Lagoon Fish Index ELFI) and ecological network analysis (ENA) indices. ENA and biodiversity indicators were applied on six spatial boxes describing the Seine estuary and its outlet. Results showed an increase in taxonomic and functional richness over time, mainly due to marinisation, and significant changes in food-web properties in relation to Port2000. ENA indices appeared as a promising method in ecological status assessment, especially for estuaries considered as inherently disturbed. {\textcopyright} 2019 Elsevier Ltd}, keywords = {Biodiversity, bioindicator, community composition, ecological approach, ecological modeling, ecosystem function, ecosystem health, environmental assessment, estuarine ecosystem, food web, France, habitat management, health status, human activity, Le Havre, Normandie, Seine Estuary, Seine Maritime}, issn = {02727714}, doi = {10.1016/j.ecss.2019.106339}, url = {https://www.sciencedirect.com/science/article/abs/pii/S0272771419300484}, author = {Le Guen, Camille and Samuele Tecchio and Jean-Claude Dauvin and De Roton, G. and Lobry, Jeremy and Lepage, Mario and Morin, Jocelyne and G{\'e}raldine Lassalle and Raoux, Aurore and Nathalie Niquil} } @article {Raoux2019728, title = {Measuring sensitivity of two OSPAR indicators for a coastal food web model under offshore wind farm construction}, journal = {Ecological Indicators}, volume = {96}, year = {2019}, note = {cited By 2}, pages = {728-738}, publisher = {Elsevier B.V.}, abstract = {A combination of modelling tools was applied to simulate the impacts of the future Courseulles-sur-mer offshore wind farm (OWF) construction (Bay of Seine, English Channel) on the ecosystem structure and functioning. To do so, food-web models of the ecosystem under three scenarios were constructed to investigate the effect caused by the OWF of added substrate (reef effect), fishing restriction (reserve effect), and their combined effect. Further, Ecological Network Analysis indices and Mean Trophic Level were derived to investigate their suitability for detecting changes in the ecosystem state. Our analysis suggests changes in the ecosystem structure and functioning after the OWF construction, the ecosystem maturity was predicted to increase, but no alterations in its overall resilience capacity. {\textcopyright} 2018 Elsevier Ltd}, keywords = {Barium compounds, Bay of Seine, coastal zone, Ecological network analysis, Ecopath with Ecosim, ecosystem function, ecosystem structure, Ecosystems, Electric utilities, English Channel, food web, France, in situ measurement, Marine environment, Marine renewable energy, measurement method, model, Offshore wind farms, Reefs, Reserve effect, sensitivity analysis, trophic level, wind farm}, issn = {1470160X}, doi = {10.1016/j.ecolind.2018.07.014}, url = {https://www.sciencedirect.com/science/article/abs/pii/S1470160X1830534X}, author = {Raoux, Aurore and G{\'e}raldine Lassalle and Pezy, Jean-Philippe and Samuele Tecchio and Safi, Georges and Ernande, Bruno and Maz{\'e}, C. and Le Loc{\textquoteright}h, Francois and Lequesne, Justine and Girardin, Valerie and Jean-Claude Dauvin and Nathalie Niquil} } @article {Raoux201811, title = {Assessing cumulative socio-ecological impacts of offshore wind farm development in the Bay of Seine (English Channel)}, journal = {Marine Policy}, volume = {89}, year = {2018}, note = {cited By 2}, pages = {11-20}, publisher = {Elsevier Ltd}, abstract = {As part of the energy transition, the French government is planning the construction of Offshore Wind Farms (OWFs) in Normandy. These OWFs will be integrated into an ecosystem already facing multiple anthropogenic disturbances. A holistic view of cumulated impacts (OWF construction, global warming and fisheries) were developed on the Courseulles-sur-Mer{\textquoteright} ecosystem through the use of a qualitative mathematical modelling approach. This modelling approach provides the mean to consider alternative hypotheses about how the ecosystem structure and function affects its dynamics. Alternative models were constructed to address the different hypotheses regarding the behaviour of top predator (whether the top predators will be scared away by the OWF or attracted by the reef effect), impacts of global warming and changes in fisheries activities. Key findings from these analyses are that the OWF construction could lead to an increase in benthos species and fish benthos feeders whatever the perturbation scenario, while the predicted response of top predators was ambiguous across all perturbation scenario. Qualitative modelling results can play a vital role in decision making by improving long term planning for the marine environment but also as a tool for communication with the public and so contribute to a better acceptability of the Marine Renewable Energy (MRE) project. {\textcopyright} 2017 Elsevier Ltd}, keywords = {alternative energy, Bay of Seine, development project, ecological impact, ecosystem management, English Channel, environmental impact assessment, environmental planning, France, Marine environment, offshore structure, qualitative analysis, social impact, wind farm}, issn = {0308597X}, doi = {10.1016/j.marpol.2017.12.007}, url = {https://www.sciencedirect.com/science/article/pii/S0308597X1730444X}, author = {Raoux, Aurore and Dambacher, J.M. and Pezy, Jean-Philippe and Maz{\'e}, C. and Jean-Claude Dauvin and Nathalie Niquil} } @article {5036, title = {Before-After analysis of the trophic network of an experimental dumping site in the eastern part of the Bay of Seine (English Channel)}, journal = {Marine Pollution Bulletin}, volume = {118}, year = {2017}, month = {05/2017}, pages = {101-111}, abstract = {

An experimental study was conducted to assess the physical and biological impacts of muddy fine sand dredged material dumped on a medium sand site Machu offshore the Seine Estuary. Complementary trophic web modelling tools were applied to the Machu ecosystem to analyse the effects of dumping operations. Results show that, after the dumping operations, the biomass of fish increased while invertebrate biomass remained relatively stable through time. Nevertheless, the biomasses of benthic invertebrates, omnivores/scavengers and predators showed some increases, while non-selective deposit feeders and filter feeders decreased. At the ecosystem level, results show that the total ecosystem activity, the ascendency and the overall omnivorous character of the food-web structure increased after dumping operations, whereas recycling subsequently decreased. Finally, the fine and medium sand habitat offshore from the Seine estuary, which undergoes regular natural physical perturbations, shows a high resilience after a short dumping phase. (C) 2017 Elsevier Ltd. All rights reserved.

}, issn = {{0025-326X}}, doi = {{10.1016/j.marpolbul.2017.02.042}}, author = {Pezy, Jean-Philippe and Raoux, Aurore and Marmin, Stella and Balay, Pierre and Nathalie Niquil and Jean-Claude Dauvin} } @article {5037, title = {Benthic and fish aggregation inside an offshore wind farm: Which effects on the trophic web functioning?}, journal = {Ecological indicators}, volume = {72}, year = {2017}, month = {01/2017}, pages = {33-46}, abstract = {

As part of the energy transition, the French government is planning the construction of three offshore wind farms in Normandy (Bay of Seine and eastern part of the English Channel, north-western France) in the next years. These offshore wind farms will be integrated into an ecosystem already facing multiple anthropogenic disturbances such as maritime transport, fisheries, oyster and mussel farming, and sediment dredging. Currently no integrated, ecosystem-based study on the effects of the construction and exploitation of offshore wind farms exists, where biological approaches generally focused on the conservation of some valuable species or groups of species. Complementary trophic web modelling tools were applied to the Bay of Seine ecosystem (to the 50 km(2) area covered by the wind farm) to analyse the potential impacts of benthos and fish aggregation caused by the introduction of additional hard substrates from the piles and the turbine scour protections. An Ecopath ecosystem model composed of 37 compartments, from phytoplankton to seabirds, was built to describe the situation {\textquoteleft}{\textquoteleft}before{{\textquoteright}{\textquoteright}} the construction of the wind farm. Then, an Ecosim projection over 30 years was performed after increasing the biomass of targeted benthic and fish compartments. Ecological Network Analysis (ENA) indices were calculated for the two periods, {\textquoteleft}{\textquoteleft}before{{\textquoteright}{\textquoteright}} and {\textquoteleft}{\textquoteleft}after{{\textquoteright}{\textquoteright}}, to compare network functioning and the overall structural properties of the food web. Our main results showed (1) that the total ecosystem activity, the overall system omnivory (proportion of generalist feeders), and the recycling increased after the construction of the wind farm; (2) that higher trophic levels such as piscivorous fish species, marine mammals, and seabirds responded positively to the aggregation of biomass on piles and turbine scour protections; and (3) a change in keystone groups after the construction towards more structuring and dominant compartments. Nonetheless, these changes could be considered as limited impacts of the wind farm installation on this coastal trophic web structure and functioning. (C) 2016 Elsevier Ltd. All rights reserved.

}, issn = {{1470-160X}}, doi = {10.1016/j.ecolind.2016.07.037}, author = {Raoux, Aurore and Samuele Tecchio and Pezy, Jean-Philippe and G{\'e}raldine Lassalle and Degraer, Steven and Wilhelmsson, Dan and Cachera, Marie and Ernande, Bruno and Le Guen, Camille and Haraldsson, Matilda and Karine Granger{\'e} and Le Loc{\textquoteright}h, Francois and Dauvin, Jean-Claude and Nathalie Niquil} } @article {5366, title = {Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database}, journal = {Journal of Sea Research}, volume = {130}, year = {2017}, pages = {96 - 106}, abstract = {

This study aims to describe the patterns of soft bottom macrozoobenthic richness along French coasts. It is based on a collaborative database developed by the {\textquotedblleft}R{\'e}seau des Stations et Observatoires Marins{\textquotedblright} (RESOMAR). We investigated patterns of species richness in sublittoral soft bottom habitats (EUNIS level 3) at two different spatial scales: 1) seaboards: English Channel, Bay of Biscay and Mediterranean Sea and 2) 0.5{\textdegree} latitudinal and longitudinal grid. Total observed richness, rarefaction curves and three incidence-based richness estimators (Chao2, ICE and Jacknife1) were used to compare soft bottom habitats species richness in each seaboard. Overall, the Mediterranean Sea has the highest richness and despite higher sampling effort, the English Channel hosts the lowest number of species. The distribution of species occurrence within and between seaboards was assessed for each major phylum using constrained rarefaction curves. The Mediterranean Sea hosts the highest number of exclusive species. In pairwise comparisons, it also shares a lower proportion of taxa with the Bay of Biscay (34.1\%) or the English Channel (27.6\%) than that shared between these two seaboards (49.7\%). Latitudinal species richness patterns along the Atlantic and English Channel coasts were investigated for each major phylum using partial LOESS regression controlling for sampling effort. This showed the existence of a bell-shaped latitudinal pattern, highlighting Brittany as a hotspot for macrobenthic richness at the confluence of two biogeographic provinces.

}, keywords = {France, Latitudinal pattern, Regional pattern, Soft-bottom, Species richness, Zoobenthos}, issn = {1385-1101}, doi = {https://doi.org/10.1016/j.seares.2017.03.011}, url = {http://www.sciencedirect.com/science/article/pii/S1385110116302660}, author = {R{\'e}gis K. Gallon and Nicolas Lavesque and Jacques Grall and C{\'e}line Labrune and Antoine Gr{\'e}mare and Guy Bachelet and Hugues Blanchet and Paulo Bonif{\'a}cio and Vincent M.P. Bouchet and Jean-Claude Dauvin and Nicolas Desroy and Franck Gentil and Laurent Guerin and C{\'e}line Houbin and J{\'e}r{\^o}me Jourde and Sandrine Laurand and Michel Le Duff and Vincent Le Garrec and Xavier de Montaudouin and Fr{\'e}d{\'e}ric Olivier and Francis Orvain and Pierre-Guy Sauriau and Eric Thi{\'e}baut and Olivier Gauthier} } @article {4041, title = {The Channel ecosystem, a cross-roads of anthropogenic pressures and scientific studies: Lessons learned from the European \{INTERREG\} \{IV\} projects (2009{\textendash}2015)}, journal = {Marine Policy}, volume = {63}, year = {2016}, month = {11/2015}, pages = {158 - 165}, author = {L Evariste and Pascal Claquin and Jean-Paul Robin and Arnaud Auber and Abigail McQuatters-Gollop and Jean-Claude Dauvin} } @article {5039, title = {Evaluating ecosystem-level anthropogenic impacts in a stressed transitional environment: The case of the Seine estuary}, journal = {ECOLOGICAL INDICATORS}, volume = {61}, year = {2016}, month = {02/2016}, pages = {833-845}, abstract = {

During 2002-2005, a new container terminal in the commercial harbour of Le Havre, named "Port2000", was built on the northern flank of the Seine estuary, northern France. This extension is already known to have modified the estuary current and sediment dynamics, as well as reducing biomass of the suprabenthos assemblage, for the whole downstream part of the system. However, studies on other biotic communities were largely inconclusive, and an ecosystem-wide analysis was still lacking. Here, we performed a before/after study of ecosystem dynamics of the different habitats of the Seine estuary, using a Linear Inverse Modelling technique (LIM-MCMC) to estimate all flows occurring in the food web. Ecological Network Analysis indices were calculated, summarising ecosystem functioning traits and giving indications about the habitat health status. Results showed that the southern flank (FS, Fosse Sud) exhibits all characteristics to be considered as the least stressed habitat of the estuary: system activity and functional specialisation of flows were stable between periods, ecosystem recycling processes and detrital dynamics were also stable; an increase in trophic specialisation (decrease in system omnivory) was the only change confirming a general ecological succession. The northern flank (FN, Fosse Nord), where the actual terminal was built, showed a food web with increased importance of lower trophic levels (increased detritivory and carbon recycling), increased stability and flow efficiency, but possibly regressed to a previous step in ecological succession. In the central navigation channel (CH), patterns of network indices were overall inconclusive and the general image is one of a constantly shifting food web, a condition possibly caused by the year-round dredging activities. The functioning of the Seine estuary especially of FN and FS - seems to have been modified by the combination of harbour construction and the related mitigation measures. Network indices partially captured this combination of changes and, although not fully operational yet, they are promising tools to comply with the European Union mandate of defining ecosystem health status. (c) 2015 Elsevier Ltd. All rights reserved.

}, issn = {{1470-160X}}, doi = {{10.1016/j.ecolind.2015.10.036}}, author = {Samuele Tecchio and Chaalali, Aur{\'e}lie and Raoux, Aurore and Rius, Armonie Tous and Lequesne, Justine and Girardin, Valerie and G{\'e}raldine Lassalle and Cachera, Marie and Riou, P and Lobry, Jeremy and Dauvin, Jean-Claude and Nathalie Niquil} } @proceedings {3545, title = {Artificial reef: Multiscale monitoring of colonization and primary production - R{\'e}cif artificiel: mise en place d{\textquoteright}un suivi de la colonisation a plusieurs {\'e}chelles}, volume = {1}, year = {2015}, month = {01/2015}, pages = {103-110}, edition = {M. Boutouil \& S. Leboulanger}, address = {ESITC Caen}, isbn = {978-2-95517664-0-5}, author = {Pascal Claquin and Leroy, Fanny and Anne-Marie Rusig and Isabelle Mussio and Eric Feunteun and Foveau, Aur{\'e}lie and Jean-Claude Dauvin and R{\'e}gis Gallon and Lebrun, J-L and Lestarquit, Mabel and Francis Orvain and Anne-Sophie Martinez and Desoche, E and Napol{\'e}on, Camille and Roussel, D{\'e}borha and Boutoil, Mohamed} } @proceedings {3547, title = {Colonisation {\`a} court terme par le benthos sur un {\'e}co-r{\'e}cif artificiel}, volume = {1}, year = {2015}, month = {01/2015}, pages = {119-126}, edition = {M. Boutouil \& S. Leboulanger}, address = {ESITC Caen}, isbn = {978-2-95517664-0-5}, author = {Foveau, Aur{\'e}lie and Jean-Claude Dauvin and Anne-Marie Rusig and Isabelle Mussio and Pascal Claquin} } @article {5042, title = {The mosaic of habitats of the Seine estuary: Insights from food-web modelling and network analysis}, journal = {ECOLOGICAL MODELLING}, volume = {312}, year = {2015}, month = {09/2015}, pages = {91-101}, abstract = {

Ecological network analysis was applied in the Seine estuary ecosystem, northern France, integrating ecological data from the years 1996 to 2002. The Ecopath with Ecosim (EwE) approach was used to model the trophic flows in 6 spatial compartments leading to 6 distinct EwE models: the navigation channel and the two channel flanks in the estuary proper, and 3 marine habitats in the eastern Seine Bay. Each model included 12 consumer groups, 2 primary producers, and one detritus group. Ecological network analysis was performed, including a set of indices, keystoneness, and trophic spectrum analysis to describe the contribution of the 6 habitats to the Seine estuary ecosystem functioning. Results showed that the two habitats with a functioning most related to a stressed state were the northern and central navigation channels, where building works and constant maritime traffic are considered major anthropogenic stressors. The strong top-down control highlighted in the other 4 habitats was not present in the central channel, showing instead (i) a change in keystone roles in the ecosystem towards sediment-based, lower trophic levels, and (ii) a higher system omnivory. The southern channel evidenced the highest system activity (total system throughput), the higher trophic specialisation (low system omnivory), and the lowest indication of stress (low cycling and relative redundancy). Marine habitats showed higher fish biomass proportions and higher transfer efficiencies per trophic levels than the estuarine habitats, with a transition area between the two that presented intermediate ecosystem structure. The modelling of separate habitats permitted disclosing each one{\textquoteright}s response to the different pressures, based on their a priori knowledge. Network indices, although non-monotonously, responded to these differences and seem a promising operational tool to define the ecological status of transitional water ecosystems. (C) 2015 Elsevier B.V. All rights reserved.

}, issn = {{0304-3800}}, doi = {{10.1016/j.ecolmodel.2015.05.026}}, author = {Samuele Tecchio and Rius, Armonie Tous and Dauvin, Jean-Claude and Lobry, Jeremy and G{\'e}raldine Lassalle and Morin, Jocelyne and Bacq, Nicolas and Cachera, Marie and Chaalali, Aur{\'e}lie and Villanueva, Maria Ching and Nathalie Niquil} } @article {3769, title = {What did we learn from PEGASEAS forum "Science and Governance of the Channel Marine Ecosystem"?}, journal = {Mar Pollut Bull}, volume = {93}, year = {2015}, month = {2015 Apr 15}, pages = {1-4}, abstract = {

As one of the busiest marine ecosystems in the world, the English Channel is subjected to strong pressures due to the human activities occurring within it. Effective governance is required to improve the combined management of different activities and so secure the benefits provided by the Channel ecosystem. In July 2014, a Cross-Channel Forum, entitled "Science and Governance of the Channel Marine Ecosystem", was held in Caen (France) as part of the INTERREG project "Promoting Effective Governance of the Channel Ecosystem" (PEGASEAS). Here we use outputs from the Forum as a framework for providing Channel-specific advice and recommendations on marine governance themes, including the identification of knowledge gaps, which may form the foundation of future projects for the next INTERREG project call (2015-2020).

}, issn = {1879-3363}, doi = {10.1016/j.marpolbul.2015.02.021}, author = {L Evariste and Claquin, Pascal and Jean-Paul Robin and Arnaud Auber and Abigail McQuatters-Gollop and Fletcher, Stephen and Glegg, Gillian and Jean-Claude Dauvin} } @article {3487, title = {Multiscale patterns in the diversity and organization of benthic intertidal fauna among French Atlantic estuaries}, journal = {Journal of Sea Research}, volume = {90}, year = {2014}, month = {07/2014}, pages = {95 - 110}, abstract = {

Based on a parallel sampling conducted during autumn 2008, a comparative study of the intertidal benthic macrofauna among 10 estuarine systems located along the Channel and Atlantic coasts of France was performed in order to assess the level of fauna similarity among these sites and to identify possible environmental factors involved in the observed pattern at both large (among sites) and smaller (benthic assemblages) scales. More precisely this study focused on unraveling the observed pattern of intertidal benthic fauna composition and diversity observed at among-site scale by exploring both biotic and abiotic factors acting at the among- and within-site scales. Results showed a limited level of similarity at the among-site level in terms of intertidal benthic fauna composition and diversity. The observed pattern did not fit with existing transitional water classification methods based on fish or benthic assemblages developed in the frame of the European Water Framework Directive (WFD). More particularly, the coastal plain estuaries displayed higher among-site similarity compared to ria systems. These coastal plain estuaries were characterized by higher influence of river discharge, lower communication with the ocean and high suspended particulate matter levels. On the other hand, the ria-type systems were more dissimilar and different from the coastal plain estuaries. The level of similarity among estuaries was mainly linked to the relative extent of the intertidal {\textquotedblleft}Scrobicularia plana{\textendash}Cerastoderma edule{\textquotedblright} and {\textquotedblleft}Tellina tenuis{\textquotedblright} or {\textquotedblleft}Venus{\textquotedblright} communities as a possible consequence of salinity regime, suspended matter concentrations and fine particles supply with consequences on the trophic functioning, structure and organization of benthic fauna. Despite biogeographical patterns, the results also suggest that, in the context of the WFD, these estuaries should only be compared on the basis of the most common intertidal habitat occurring throughout all estuarine systems and that the \{EUNIS\} biotope classification might be used for this purpose. In addition, an original inverse relation between γ-diversity and area was shown; however, its relevance might be questioned.

}, keywords = {Diversity, Estuaries, Macrozoobenthos, Structuring Factors, WFD}, issn = {1385-1101}, doi = {http://dx.doi.org/10.1016/j.seares.2014.02.014}, url = {http://www.sciencedirect.com/science/article/pii/S1385110114000495}, author = {Hugues Blanchet and Beno{\^\i}t Gouillieux and Sandrine Alizier and Jean-Michel Amouroux and Guy Bachelet and Anne-Laure Barill{\'e} and Jean-Claude Dauvin and Xavier de Montaudouin and Val{\'e}rie Derolez and Nicolas Desroy and Jacques Grall and Antoine Gr{\'e}mare and Pascal Hacquebart and J{\'e}r{\^o}me Jourde and C{\'e}line Labrune and Nicolas Lavesque and Antoine Meirland and Thiebaut Nebout and Fr{\'e}d{\'e}ric Olivier and Corine Pelaprat and Thierry Ruellet and Pierre-Guy Sauriau and S{\'e}bastien Thorin} }