Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database

Régis K. Gallon; Nicolas Lavesque; Jacques Grall; Céline Labrune; Antoine Grémare; Guy Bachelet; Hugues Blanchet; Vincent M. P. Bouchet; Jean-Claude Dauvin; Nicolas Desroy; Franck Gentil; Laurent Guérin; Céline Houbin; Jérôme Jourde; Sandrine Laurand; Michel Le Duff; Vincent Le Garrec; Xavier Montaudouin; Frédéric Olivier; Francis Orvain; Pierre-Guy Sauriau; Eric Thiébaut; Olivier Gauthier

Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database

Régis K. Gallon ^{1, 2} Nicolas Lavesque ³ Jacques Grall ² Céline Labrune ⁴ Antoine Grémare ³ Guy Bachelet ³ Hugues Blanchet ³ Vincent M. P. Bouchet ⁵ Jean-Claude Dauvin ⁶ Nicolas Desroy ⁷ Franck Gentil ⁸ Laurent Guérin ⁹ Céline Houbin ⁸ Jérôme Jourde ¹⁰ Sandrine Laurand ² Michel Le Duff ¹¹ Vincent Le Garrec ¹² Xavier Montaudouin ¹³ Frédéric Olivier ¹⁴ Francis Orvain ¹⁵ Pierre-Guy Sauriau ¹⁰ Eric Thiébaut ¹⁶ Olivier Gauthier ^{17, 18}

1 INTECHMER - Institut national des sciences et techniques de la mer

2 UBO - Université de Brest

3 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux

4 LECOB - Laboratoire d'Ecogéochimie des environnements benthiques

5 ULCO - Université du Littoral Côte d'Opale

6 M2C - Morphodynamique Continentale et Côtière

7 CRESCO, Station IFREMER,

8 SBR - Station biologique de Roscoff [Roscoff]

9 IPR - Institut de Physique de Rennes

10 LIENSs - LIttoral ENvironnement et Sociétés - UMR 7266

11 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)

12 IUEM - Institut Universitaire Européen de la Mer

13 EPOC - Environnements et Paléoenvironnements OCéaniques

14 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques

15 UNICAEN - Université de Caen Normandie

16 SU - Sorbonne Université

17 ONIRIS - Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique

18 LIOAD - Laboratoire d'ingénierie osteo-articulaire et dentaire

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 “Réseau des Stations et Observatoires Marins” (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° 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 : species richness Regional pattern Soft-bottom ACL DISCOVERY France Latitudinal pattern zoobenthos

Document type :

Journal articles

Domain :

Environmental Sciences / Biodiversity and Ecology

Physics [physics]

Complete list of metadatas

https://hal.univ-brest.fr/hal-01510350
Contributor : Luis Tito de Morais <>
Submitted on : Wednesday, April 19, 2017 - 1:55:01 PM
Last modification on : Wednesday, June 12, 2019 - 4:12:05 PM

Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database

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Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database

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