Long-term (1998 vs. 2010) large-scale comparison of soft-bottom benthic macrofauna composition in the Gulf of Lions, NW Mediterranean Sea
|Author(s)||Bonifacio Paulo1, 2, Gremare Antoine1, Gauthier Olivier3, Romero-Ramirez Alicia1, Bichon Sabrina1, Amouroux Jean-Michel2, Labrune Celine2|
|Affiliation(s)||1 : Univ Bordeaux, CNRS, UMR 5805, EPOC, F-33400 Talence, France.
2 : UPMC Univ Paris 06, Sorbonne Univ, CNRS, UMR 8222,LECOB,Observ Oceanol, F-66650 Banyuls Sur Mer, France.
3 : Univ Bretagne Occidentale, Inst Univ Europeen Mer, CNRS, UMR 6539,Lab Sci Environm Marin LEMAR, Rue Dumont Urville, F-29280 Plouzane, France.
|Source||Journal Of Sea Research (1385-1101) (Elsevier Science Bv), 2018-01 , Vol. 131 , P. 32-45|
|WOS© Times Cited||12|
|Keyword(s)||Zoobenthos, Macrofauna, Temporal variations, Species diversity, Mediterranean Sea, Gulf of Lions|
We achieved a long term (i.e.,1998 vs. 2010) large scale (i.e., whole Gulf of Lions) study of benthic macrofauna composition in the Gulf of Lions based on the resampling of 91 stations located along 21 inshore-offshore transects. Results show that the 3 main benthic communities identified in 1998 were still present in 2010 although their composition changed. Using only year and station of sampling we found a significant space-time interaction explaining changes in macrofaunal community composition, and, in this study, stations differ primarily in terms of depth and distance to the Rhone river mouth. Temporal changes in benthic macrofauna composition were clearly most important at shallow stations (i.e., in the Littoral Fine Sand community) than at deep ones (i.e., Terrigenous Coastal Mud community). These results are in good agreement with the current paradigm according to which climatic oscillations such as NAO (North Atlantic Oscillation) and WeMO (Western Mediterranean Oscillation) are indirectly (i.e., through changes in the frequency of occurrence and the intensity of storms) controlling benthic macrofauna composition in the Gulf of Lions. This hypothesis is further supported by a meta-analysis of changes in the average and maximal yearly abundances of the polychaete Ditrupa arietina. At last, the spatial modelling of 1998 and 2010 benthic macrofauna compositions both suggested a significant effect of Rhone River inputs on the spatial distribution of benthic macrofauna in the Gulf of Lions.