FN Archimer Export Format
PT J
TI Spatial distribution and nutritional requirements of the endosymbiont-bearing bivalve Loripes lacteus (sensu Poli, 1791) in a Mediterranean Nanozostera noltii (Hornemann) meadow
BT 
AF ROSSI, Francesca
   COLAO, Elodie
   JOSE MARTINEZ, Maria
   KLEIN, Judith C.
   CARCAILLET, Frederique
   CALLIER, Myriam
   DE WIT, Rutger
   CARO, Audrey
AS 1:1;2:1;3:3;4:1,4;5:1;6:1,2;7:1;8:1;
FF 1:;2:;3:;4:;5:;6:PDG-RBE-BOME-LALR;7:;8:;
C1 Univ Montpellier I, Univ Montpellier 2, IFREMER, IRD,CNRS,UMR 5119, F-34095 Montpellier, France.
   IFREMER, Dept Ressources Biol & Environm, UMR 5119, Stn Palavas, F-34250 Palavas Les Flots, France.
   Univ Pablo de Olavide, Zool Lab, Seville 41013, Spain.
   Leibniz Ctr Trop Marine Ecol, D-28359 Bremen, Germany.
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   UNIV PABLO DE OLAVIDE, SPAIN
   ZMT, GERMANY
SI PALAVAS
SE PDG-RBE-BOME-LALR
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.475
TC 15
UR https://archimer.ifremer.fr/doc/00138/24911/26373.pdf
LA English
DT Article
DE ;Bivalve;Food web;Mediterranean;Seagrass;Stable isotopes;Symbiosis
AB Sulphur-oxidising endosymbiont-bearing bivalves often inhabit seagrass meadows, where they can control sulphide levels and variably contribute to carbon cycling, by feeding on endosymbiotic bacteria and/or on particulate organic matter from the water column. The patterns of variability in their feeding mode and their spatial distribution within the seagrass meadows are however poorly studied. Seagrass beds form naturally patchy habitats with seagrass-sand edges that may have variable effects on different organisms. The present study aims at understanding differences in feeding mode and abundance of the endosymbiont-bearing bivalve Loripes lacteus (sensu Poli, 1791) as well as the physiological conditions of its endosymbiotic populations between edge and inner portion of meadows of the eelgrass Nanozostera noltii (Hornemann). In July 2010, Loripes specimens were sampled in 4 eelgrass patches at 2 different locations in the Thau lagoon, South of France. There was a clear negative edge effect on the abundance of small individuals of Loripes, while large individuals were homogeneously distributed between edge and inner part of the meadow. Although Loripes isotopic signatures (δ13C and δ15N) were always closer to those of its symbiotic bacteria than to those of suspension-feeding bivalves, eelgrass edge enhanced mixotrophic behaviour of small animals, which assimilated less bacterial carbon and nitrogen at the edge than in the inner part of the eelgrass meadow. No differences related to eelgrass edges were instead found for the bacterial populations harboured by Loripes. Rather, flow cytometry revealed large variability at small spatial scales. Although bacteria were always important for the nutrition of Loripes, these findings showed that seagrass edges may contribute to regulate feeding mode and population structure of Loripes, which may have implications for seagrass functioning.
PY 2013
PD FEB
SO Journal Of Experimental Marine Biology And Ecology
SN 0022-0981
PU Elsevier Science Bv
VL 440
UT 000316092500016
BP 108
EP 115
DI 10.1016/j.jembe.2012.12.010
ID 24911
ER

EF