Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel)

Type Article
Date 2020-10
Language English
Author(s) Bacouillard Lise1, Baux Noémie2, 3, 4, Dauvin Jean-Claude2, Desroy NicolasORCID5, Geiger Katja Juliana1, Gentil Franck1, Thiébaut Éric1
Affiliation(s) 1 : Sorbonne Université, CNRS, Station Biologique de Roscoff, UMR7144, Adaptation et Diversité en Milieu Marin, Place Georges Teissier, CS90074, 29688, Roscoff Cedex, France
2 : Normandie Univ., UNICAEN, Laboratoire Morphodynamique Continentale et Côtière M2C, UMR, CNRS, 6143 M2C, 24 rue des Tilleuls, F-14000, Caen, France
3 : Normandie Univ., UNICAEN, Laboratoire des Sciences Appliquées de Cherbourg, EA 4 253, 50100, Cherbourg, France
4 : Conservatoire National des Arts et Métiers, INTECHMER, 50100, Cherbourg, France
5 : IFREMER, Station de Dinard, LER Bretagne Nord, 38 rue du Port Blanc, 35800, Dinard, France
Source Marine Environmental Research (0141-1136) (Elsevier BV), 2020-10 , Vol. 161 , P. 105062 (14p.)
DOI 10.1016/j.marenvres.2020.105062
WOS© Times Cited 5
Keyword(s) Benthic ecology, Coastal zone, Temporal variability, Species composition, Macrofauna, alpha-diversity, beta-diversity, gamma-diversity

In the English Channel, the eastern Bay of Seine is exposed to numerous anthropogenic disturbances, in particular major changes in sediment dynamics, which are expected to greatly impact benthic communities. To assess the long-term effects of these stressors on the muddy fine sand benthic community, an original long-term monitoring program has been implemented since 1988. It is based on the sampling of a network of 60 stations during seven surveys over 28 years from 1988 to 2016. We investigate changes of species abundance, species composition and species diversity at different scales (α-diversity, β-diversity and γ-diversity). Contrary to results obtained in many coastal areas, our results showed a long-term persistence of the community in terms of species composition and structure although a general shift towards muddy sediment have resulted in increased colonisation by species associated with muddy habitats and a decrease in spatial beta diversity.

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Bacouillard Lise, Baux Noémie, Dauvin Jean-Claude, Desroy Nicolas, Geiger Katja Juliana, Gentil Franck, Thiébaut Éric (2020). Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel). Marine Environmental Research, 161, 105062 (14p.). Publisher's official version : https://doi.org/10.1016/j.marenvres.2020.105062 , Open Access version : https://archimer.ifremer.fr/doc/00640/75215/