FN Archimer Export Format
PT J
TI Cadmium pathways in an exploited intertidal ecosystem with chronic cadmium inputs (Marennes-Oleron, Atlantic coast, France)
BT 
AF PIGEOT, J
   MIRAMAND, P
   GUYOT, T
   SAURIAU, Pierre-Guy
   FICHET, D
   LE MOINE, Olivier
   HUET, V
AS 1:1;2:1;3:1;4:2;5:1;6:3;7:1;
FF 1:;2:;3:;4:;5:;6:PDG-DOP-LER-LERPC;7:;
C1 Univ La Rochelle, Lab Biol & Environm Marins, CNRS, FRE 2727, F-17042 Nantes 01, France.
   IFREMER, CNRS, UMR10, CREMA, F-17137 Lhoumeau, France.
   IFREMER, LERPC, F-17390 La Tremblade, France.
C2 UNIV LA ROCHELLE, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI LA ROCHELLE
   LA TREMBLADE
SE PDG-DOP-DCN-AGSAE-CRELA
   PDG-DOP-LER-LERPC
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.286
TC 27
UR https://archimer.ifremer.fr/doc/2006/publication-3615.pdf
LA English
DT Article
DE ;Marennes Oleron Bay;Trophic food web;Bioaccumulation;Cadmium;Macrofauna;Microphytobenthos;Macrophytes
AB The Marennes-Oleron Bay is subject to chronic pollution by cadmium (Cd) from the Gironde watershed. An ecosystem approach was used to study the fate of cadmium in the different biological compartments. The median Cd concentration was 0.4 mu g g(-1) dry weight for the 63 benthic species measured. When combined with the respective biomasses for the different species studied, we estimated that 7 kg of Cd is partitioned into the soft tissues of the benthic species in the bay. The majority of this cadmium was distributed between primary producers, mainly microphytobenthos (40 %), and suspension-feeders, mainly oysters (40 %). All other benthic species measured were associated with negligible masses of Cd. Two trophic levels contained 98 % of the Cd: 3 kg was partitioned into primary producers (of which 77 % is associated with the microphytobenthos) and 3.2 kg of Cd was distributed among all suspension feeders. The carnivores, including scavengers, concentrated less than 0.2 kg of Cd, suggesting an absence of biomagnification of Cd in the trophic food web of the bay. The microphytobenthic compartment was estimated to control the largest quantity of Cd (ca. 188 kg yr(-1)), suggesting an important role for the microphytobenthos in the biogeochemical cycle of Cd in the bay. The quantities of Cd associated with annual biological production in other biological compartments were low: 2 kg yr(-1) for eelgrass which could represent a vector of Cd transfer to winter populations of Brent geese and 1.4 kg yr(-1) for all suspension feeders, principally the cultivated Pacific oysters (64 %) representing a vector of Cd transfer to humans. An ecosystem-wide budget for the quantities of Cd present in all the biological and physical compartments showed that the majority of Cd (1 t) is trapped in the upper 5 cm of the bay sediments, representing a potential risk for the oyster and shellfish cultivation in the bay.
PY 2006
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-Research
VL 307
UT 000235775700008
BP 101
EP 114
DI 10.3354/meps307101
ID 3615
ER

EF