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Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database
Gallon, R.K.; Lavesque, N.; Grall, J.; Labrune, C.; Grémare, A.; Bachelet, G.; Blanchet, H.; Bonifacio, P.; Bouchet, V.M.P.; Dauvin, J.C.; Desroy, N.; Gentil, F.; Guérin, L.; Houbin, C.; Jourde, J.; Laurand, S.; Le Duff, M.; Le Garrec, V.; de Montaudouin, X.; Gauthier, O.; Orvain, F.; Sauriau, P.-G.; Thiebaut, E. (2017). Regional and latitudinal patterns of soft-bottom macrobenthic invertebrates along French coasts: Results from the RESOMAR database. J. Sea Res. 130: 96-106. https://dx.doi.org/10.1016/j.seares.2017.03.011
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer
|  |
| Trefwoorden |
Aquatic communities > Benthos > Zoobenthos
France
France [Marine Regions]
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| Author keywords |
Species richness; Regional pattern; Latitudinal pattern; Soft bottom |
| Auteurs | | Top |
- Gallon, R.K.
- Lavesque, N.
- Grall, J.
- Labrune, C.
- Grémare, A.
- Bachelet, G.
- Blanchet, H.
- Bonifacio, P.
|
- Bouchet, V.M.P.
- Dauvin, J.C.
- Desroy, N.
- Gentil, F.
- Guérin, L.
- Houbin, C.
- Jourde, J.
- Laurand, S.
|
- Le Duff, M.
- Le Garrec, V.
- de Montaudouin, X.
- Gauthier, O.
- Orvain, F.
- Sauriau, P.-G.
- Thiebaut, E.
|
| 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. |
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