Trophic significance of kelps in kelp communities in Brittany (France) inferred from isotopic comparisons

Jean-Charles Leclerc 1, * Pascal Riera 1 Cédric Leroux 1 Laurent Lévêque 1 M. Laurent 2 G. Schaal 3 Dominique Davoult 1
* Auteur correspondant
1 ADMM - Adaptation et diversité en milieu marin
2 STH - Laboratoire de Biologie Halieutique
3 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)
Abstract : The relative contribution of kelps and other food sources to the diet of consumers in shallow coastal communities has been hotly debated in recent years. It has been suggested that considering proxies instead of phytoplankton isotopic signatures can lead to an overestimation of kelp contribution through isotopic mixing models. We analysed spatial patterns in carbon isotopic ratios of the dominant primary sources and consumers at two subtidal sites in Brittany (France) prior to the anticipated 2011 phytoplankton bloom to determine which of kelp and phytoplankton is the dominant food source in Laminaria hyperborea forests. We found simultaneous spatial variations for consumers, kelps and deposited particulate organic matter, suggesting that kelp-derived organic matter is a key component of associated food webs for at least part of the year.
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Article dans une revue
Marine Biology, Springer Verlag, 2013, 160 (12), pp.3249-3258. 〈10.1007/s00227-013-2306-5〉
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Soumis le : mardi 20 août 2013 - 14:20:08
Dernière modification le : mercredi 21 mars 2018 - 18:57:21

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Jean-Charles Leclerc, Pascal Riera, Cédric Leroux, Laurent Lévêque, M. Laurent, et al.. Trophic significance of kelps in kelp communities in Brittany (France) inferred from isotopic comparisons. Marine Biology, Springer Verlag, 2013, 160 (12), pp.3249-3258. 〈10.1007/s00227-013-2306-5〉. 〈hal-00852265〉

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