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

Régis K. Gallon 1, 2, 3 Nicolas Lavesque 4 Jacques Grall 3, 5 Céline Labrune 6 Antoine Grémare 4 Guy Bachelet 4 Hugues Blanchet 4 Vincent M. P. Bouchet 7 Jean-Claude Dauvin 8 Nicolas Desroy 9, 10 Franck Gentil 11, 12 Laurent Guérin 13 Céline Houbin 11, 12 Jérôme Jourde 14 Sandrine Laurand 5 Michel Le Duff 5 Vincent Le Garrec 5 Xavier Montaudouin 15 Frédéric Olivier 16, 17 Francis Orvain 18, 16 Pierre-Guy Sauriau 14 Eric Thiébaut 11, 12 Olivier Gauthier 3
1 INTECHMER - Institut national des sciences et techniques de la mer
2 LUSAC - Laboratoire Universitaire des Sciences Appliquées de Cherbourg
3 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)
4 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux
5 IUEM - Institut Universitaire Européen de la Mer
6 LECOB - Laboratoire d'Ecogéochimie des environnements benthiques
7 LOG - Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187
8 M2C - Morphodynamique Continentale et Côtière
9 LERBN - Laboratoire Environnement Ressource Bretagne Nord
10 IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer
11 AD2M - Adaptation et diversité en milieu marin
12 SBR - Station biologique de Roscoff
13 Station marine Dinard
14 LIENSs - LIttoral ENvironnement et Sociétés - UMRi 7266
15 EPOC - Environnements et Paléoenvironnements OCéaniques
16 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques
17 Station de Biologie Marine de Concarneau
DGD.REVE - Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation
18 UNICAEN - Université de Caen Normandie
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 : zoobenthos Latitudinal pattern France ACL Soft-bottom Regional pattern species richness
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UNIV-BREST | UMS-2348 | UNIV-ROCHELLE | RMES | CMM | M2C | UNIROUEN | UNICAEN | SU-SCIENCES | FR2424 | COMUE-NORMANDIE | LECOB | BOREA | INSU | MNHN | EPHE | UNIV-AG | CNRS | CNAM | IUEM | LEMAR | ADMM | IRD | UNIV-LILLE | UNIV-HESAM | SORBONNE-UNIVERSITE | PSL | POLITIQUES-PUBLIQUES | SU-TI

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Régis K. Gallon, Nicolas Lavesque, Jacques Grall, Céline Labrune, Antoine Grémare, et al.. Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database. Journal of Sea Research, Elsevier, 2017, 130, pp.96-106. ⟨10.1016/j.seares.2017.03.011⟩. ⟨hal-01510350⟩

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