FN Archimer Export Format
PT C
TI Dynamic of the benthic ecosystem of bedform areas assessed via structural diversity, functional diversity and isotopic diversity
BT 
AF ROBERT, Alexandre
   QUILLIEN, Nolwenn
   BACHA, Mahmoud
   CAULLE, Clémence
   NEXER, Maëlle
   PARENT, Briz
   GARLAN, Thierry
   FEUNTEUN, Eric
   CARPENTIER, Alexandre
   AMARA, Rachid
   DESROY, Nicolas
AS 1:1;2:2;3:3;4:4;5:2;6:4;7:5;8:6;9:7;10:3;11:1;
FF 1:PDG-ODE-LITTORAL-LERBN;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:PDG-ODE-LITTORAL-LERBN;
C1 IFREMER, Unité Littoral, Laboratoire Environnement et Ressources de Bretagne Nord, CRESCO, 38 rue du Port-Blanc, Dinard, 35800, France
   France Energies Marines – Environmental Integration R&D Program - 525 Avenue Alexis de Rochon, 29280 Plouzané, France
   Laboratoire d’Océanologie et de Géosciences, UMR 8187 CNRS, Université du Littoral Côte d’Opale, 32 Avenue Foch, 62930 Wimereux, France
   Ocean Zoom, 2 chemin de la Houssinière, 44300 Nantes, France
   Shom, 29200 Brest, France
   Muséum National d'Histoire Naturelle, Laboratoire Biologie des Organismes et Ecosystèmes Aquatiques, BOREA (MNHN, CNRS, Sorbonne Université, Université de Caen, IRD, Université de Guadeloupe Antilles), Station Marine de Dinard, CRESCO, 35800 Dinard, France
   Université de Rennes 1, BOREA (Muséum National d’Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, Université des Antilles), Campus de Beaulieu, 35000, Rennes, France
C2 IFREMER, FRANCE
   FRANCE ENERGIES MARINES, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   OCEAN ZOOM, FRANCE
   SHOM, FRANCE
   MNHN, FRANCE
   UNIV RENNES, FRANCE
SI DINARD
SE PDG-ODE-LITTORAL-LERBN
UR https://archimer.ifremer.fr/doc/00833/94502/101844.pdf
LA English
DT Proceedings paper
AB Thanks to the combination of various measures of diversity (structural diversity, functional diversity and isotopic diversity) the present study investigates the spatio-temporal dynamic of the benthic ecosystem of bedform areas. Results suggest that the macro-scale distribution of species is mainly driven by the migration rate of bedforms (sandbank, barchan dune and transversal dune) which changes the sediment grain size and reduces macrobenthic diversity. Conversely, the high frequency of migration events homogenizes macrobenthic communities between the troughs to the crest of bedforms. The benthic community structure also changes between seasons due to the massive recruitment of juveniles. However, if species identity and structural diversity change it have little consequences on the general ecosystem functioning. Especially, the benthic food web of bedforms areas appears very stable with limited variations, both in space and time. It displays very simplistic trophic pathways, and the present study confirms the major role of Phytoplankton blooms (and especially Phaeocystis) in sustaining the benthic food web. As bedform areas are targeted for the installation of offshore windfarms, this study will provide a sound scientific basis for future impact assessments. 
PY 2023
PD APR
CT Valance, A., Garlan, T., Crave A., and Gangloff, A. (Eds), 2023. MARID VII. Seventh International Conference on Marine and River Dune Dynamics. Rennes, France, 3-5 April 2023. University of Rennes 1 and Shom. pp.263-270
ID 94502
ER

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