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MEPS 240:291-295 (2002)
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Abstract
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d13C versus d15N of co-occurring molluscs within a community dominated by Crassostrea gigas and Crepidula fornicata (Oosterschelde, The Netherlands)
P. Riera1,2,*, L. J. Stal2, J. Nieuwenhuize2
1Station Biologique de Roscoff, Université Pierre & Marie Curie Paris VI - CNRS, Place Georges-Teissier, BP 74, 29682 Roscoff cedex, France
2Centre for Estuarine and Coastal Ecology, Netherlands Institute of Ecology (NIOO-CEMO), Postbus 140, 4400 AC Yerseke, The Netherlands
*E-mail: riera@sb-roscoff.fr
ABSTRACT: The aim of this study was to investigate, by use of d13C and d15N, the diet of co-occurring intertidal molluscs species within a community dominated by the oyster
Crassostrea gigas and its epibiont, the common Atlantic slipper limpet Crepidula fornicata. The results showed that the d13C versus d15N values of C. gigas
differed from those of the deposit feeders considered but also from the other suspension-feeding molluscs (i.e. Mytilus edulis, Cerastoderma edule and C. fornicata), being more depleted in 13C and in 15N. The
results suggest more similarities in the assimilated food sources of C. fornicata, C. edule and M. edulis. In particular, the d13C and d15N differences
between C. gigas and C. fornicata suggest that these associated suspension feeders in many shellfish culture areas may not necessarily be competitors for food sources when food is not limited.
KEY WORDS: Benthic food web · d13C · d15N · Molluscs · Crassostrea gigas · Crepidula fornicata · Oosterschelde
Full text in pdf format
Published in MEPS Vol.
240
(2002) on September 12
Print ISSN: 0171-8630; Online ISSN: 1616-1599.
Copyright © Inter-Research, Oldendorf/Luhe, 2002
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