Stable isotope analysis position of intertidal of food source and trophic nematodes and copepods

Type Article
Date 2008-04
Language English
Author(s) Rzeznik Orignac J1, 2, Boucher G1, Fichet Denis3, Richard P3, 4
Affiliation(s) 1 : MNHN, Dept Milieux & Peuplements Aquat, UMR CNRS Biol Organ Marins & Ecosyst 5178, F-75231 Paris 05, France.
2 : Univ Gdansk, Inst Oceanog, Dept Marine Ecosyst Functioning, Lab Estuarine Ecol, PL-81378 Gdynia, Poland.
3 : Univ La Rochelle, IFREMER, CNRS, CRELA UMR 6217, F-17000 La Rochelle 1, France.
Source Marine Ecology Progress Series (0171-8630) (Inter-Research), 2008-04 , Vol. 359 , P. 145-150
DOI 10.3354/meps07328
WOS© Times Cited 25
Keyword(s) Stable isotopes, Marennes Oleron, Mudflat, Food web, Benthic diatoms, Microphytobenthos, Meiofauna, Copepods, Nematodes
Abstract Four dominant nematode species and various copepods from an intertidal mudflat in Marennes-Oleron Bay were analyzed for delta C-13 and delta N-15 ratios together with their potential food source, the microphytobenthos. It was shown that microphytobenthic C is passed to nematodes either by grazing or predation on herbivorous meiofauna by other nematodes. Diatoms of different sizes exhibited different C-13 content, which can be reflected in herbivorous meiofauna, such as the nematodes Daptonema oxycerca and Metachromadora remanei and the bulk of copepods, indicating they can select different sizes of diatoms. Results confirm the need to analyze meiofauna feeding habits at the species or genera level since the delta N-15 and delta C-13 signatures differed substantially among meiofaunal species.
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