FN Archimer Export Format
PT J
TI Small-scale spatial variability of food partitioning between cultivated oysters and associated suspension-feeding species, as revealed by stable isotopes
BT 
AF DUBOIS, Stanislas
   ORVAIN, Francis
   MARIN LEAL, Julio César
   ROPERT, Michel
   LEFEBVRE, Sébastien
AS 1:1;2:1,2;3:1;4:2;5:1;
FF 1:;2:;3:;4:PDG-DOP-LER-LERN;5:;
C1 Univ Caen, Lab Biol & Biotechnol Marine, F-14032 Caen, France.
   IFREMER, Lab Environnement Resource Normandie, F-14520 Port En Bessin, France.
C2 UNIV CAEN, FRANCE
   IFREMER, FRANCE
SI LA ROCHELLE
   PORT-EN-BESSIN
SE PDG-DOP-DCN-AGSAE-CREMA
   PDG-DOP-LER-LERN
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.546
TC 92
UR https://archimer.ifremer.fr/doc/2007/publication-2626.pdf
LA English
DT Article
DE ;Trophic plasticity;Spatial variability;Stable isotopes;Sessile epibionts;Oysters;Shellfish
AB Oyster culture structures support a host of epibionts belonging to the same suspension-feeding guild, which are considered to be potential competitors for food with cultivated oysters. In an intertidal shellfish ecosystem on the northern French coast, an approach based on stable isotopes (C-13 and N-15) was used to investigate intra- and interspecific food resource partitioning among cultivated oysters and the main associated wild sessile epibionts such as polychaetes, barnacles, mussels and ascidians. The main objective of the present study was to determine inter- and intraspecific food partitioning, along with small-scale spatial variability, within the guild of suspension feeders. We demonstrated that interspecific competition was limited among co-occurring suspension-feeders (ascidians, serpulid and terebellid polychaetes, bivalves and barnacles). None of the studied species had similar delta C-13 and delta N-15 signatures, indicating that relative contributions of organic matter sources may differ for each suspension-feeding species. Spatial variability was investigated both from the view of intra- and interspecific variability. Intraspecific variability was examined with regard to species' feeding biology and the trophic plasticity of co-occurring suspension-feeders. Mantel tests indicated that spatial heterogeneity resulted not only from environmental conditions, such as elevation above sea level (a.s.l.) and sediment features, but also from the inherent spatial structure of isotopic signatures. Our results show that isotopic approaches that are limited to sampling in one area and at one time are at risk of mistaking trophic interactions.
PY 2007
PD APR
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-Research
VL 336
UT 000246980400013
BP 151
EP 160
DI 10.3354/meps336151
ID 2626
ER

EF