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Relative impact of a seagrass bed and its adjacent epilithic algal community in consumer diets
Lepoint, G.; Nyssen, F.; Gobert, S.; Dauby, P.; Bouquegneau, J.-M. (2000). Relative impact of a seagrass bed and its adjacent epilithic algal community in consumer diets. Mar. Biol. (Berl.) 136(3): 513-518. dx.doi.org/10.1007/s002270050711
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, meer
Peer reviewed article  

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  • Lepoint, G.
  • Nyssen, F.
  • Gobert, S.
  • Dauby, P.
  • Bouquegneau, J.-M.

Abstract
    The aim of this work was to identify and compare, using nitrogen and carbon stable isotope data, the food sources supporting consumer communities in a Mediterranean seagrass bed (Gulf of Calvi, Corsica) with those in an adjacent epilithic alga-dominated community. Isotopic data for consumers are not significantly different in the two communities. Particulate matter and algal material (seagrass epiflora and dominant epilithic macroalgae) appear to be the main food sources in both communities. Generally, the d13C of animals suggests that the seagrass Posidoniaoceanica (L.) Delile represents only a minor component of their diet or of the diet of their prey, but the occurrence of a mixed diet is not excluded. P.?oceanica dominates the diet of only of few species, among which holothurians appear as key components in the cycling of seagrass material.

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