publication . Article . Other literature type . 2009

Trophic relationships in a tropical stream food web assessed by stable isotope analysis

Sophie Coat; Dominique Monti; Claude Bouchon; Gilles Lepoint;
Open Access English
  • Published: 01 May 2009
  • Country: Belgium
Abstract
1. Stable isotope analysis, coupled with dietary data from the literature, was used to investigate trophic patterns of freshwater fauna in a tropical stream food web (Guadeloupe, French West Indies). 2. Primary producers (biofilm, algae and plant detritus of terrestrial origin) showed distinct delta C-13 signatures, which allowed for a powerful discrimination of carbon sources. Both autochthonous (C-13-enriched signatures) and allochthonous (C-13-depleted signatures) resources enter the food web. The migrating behaviour of fishes and shrimps between marine and freshwater during their life cycles can be followed by carbon isotopes. Here, shrimp delta C-13 signatu...
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Medical Subject Headings: fungi
free text keywords: diadromous species, food web, freshwater fauna, stable isotopes, tropical stream, : Aquatic sciences & oceanology [Life sciences], : Sciences aquatiques & océanologie [Sciences du vivant], Aquatic Science, Habitat, Biology, Trophic level, Detritivore, Omnivore, Biota, Isotope analysis, Detritus, Ecology
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