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Trophic diversity of idoteids (Crustacea, Isopoda) inhabiting the Posidonia oceanica litter Sturaro, N.; Caut, S.; Gobert, S.; Bouquegneau, J.-M.; Lepoint, G. (2010). Trophic diversity of idoteids (Crustacea, Isopoda) inhabiting the Posidonia oceanica litter. Mar. Biol. (Berl.) 157(2): 237-247. https://dx.doi.org/10.1007/s00227-009-1311-1 In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 334165 [ download pdf ]

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Trefwoorden

Diets Species diversity Cleantis prismatica (Risso, 1827) [WoRMS]; Crustacea [WoRMS]; Idotea baltica Pallas, 1772 [WoRMS]; Synischia hectica (Pallas, 1772) [WoRMS]; Idoteidae Samouelle, 1819 [WoRMS]; Isopoda [WoRMS]; Posidonia oceanica (Linnaeus) Delile, 1813 [WoRMS] MED, France, Corsica, Calvi Bay [Marine Regions] Marien/Kust

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Auteurs		Top
Sturaro, N. Caut, S. Gobert, S.	Bouquegneau, J.-M. Lepoint, G.

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Abstract

The coexistence of three idoteid species in Posidonia oceanica litter raises the question of trophic diversity and their role in the litter degradation process. Hence, diet composition of Idotea balthica, Idotea hectica and Cleantis prismatica was studied using a combination of gut contents and stable isotopes analysis. Gut content observations indicate that P. oceanica dead leaves are an important part of the ingested food for the three species, although their tissues are constituted of only a small to medium fraction of P. oceanica carbon. Our results also underlined the potential role of these species in the degradation of P. oceanica litter by mechanically fragmenting the litter and by assimilating a small to medium fraction of carbon. Moreover, we showed that there were considerable inter- and intra-specific differences in diet composition. Diet differed between juveniles and adults for I. balthica. Crustaceans are an important food source for adults of I. balthica, while I. hectica indicated a major contribution of algal material. C. prismatica showed an intermediate diet. This trophic diversity is probably one of the factors allowing these species to coexist in the same biotope.

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