FN Archimer Export Format
PT J
TI Essential metal contents in indigenous gammarids related to exposure levels at the river basin scale: Metal-dependent models of bioaccumulation and geochemical correlations
BT 
AF LEBRUN, Jeremie D.
   UHER, Emmanuelle
   TUSSEAU-VUILLEMIN, Marie-Helene
   GOURLAY-FRANCE, Catherine
AS 1:1;2:1;3:2;4:1;
FF 1:;2:;3:PDG-DS;4:;
C1 Irstea, HBAN Ecotoxicol, F-92761 Antony, France.
   IFREMER, F-92138 Issy Les Moulineaux, France.
C2 IRSTEA, FRANCE
   IFREMER, FRANCE
SI SIEGE
SE PDG-DS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
IF 4.099
TC 23
UR https://archimer.ifremer.fr/doc/00180/29154/28656.pdf
LA English
DT Article
DE ;Biomonitor;Metal bioavailability;Gammarus pulex;Copper;Zinc;Manganese
AB Biomonitoring, assumed to be an integrative measurement of the chemical exposure of aquatic organisms, is not straightforward for essential metals because they can be actively regulated by animals. Although increasing bioaccumulation with exposure levels is a crucial endpoint for the development of biomonitors, it is rarely verified in real environments, where the metal concentrations are rather low and vary little. This study was designed at the scale of a river basin to assess the ability of Gammarus pulex indigenous populations to accumulate Cu, Zn and Mn in realistic exposure conditions. During two annual campaigns, water and gammarids were collected at various sites contrasted in terms of physicochemistry and contamination. The results show significant relationships between metal concentrations in animals and in freshwaters established by conceptual models of bioaccumulation, but with patterns specific to each metal (base level, internal regulation and maximal accumulation). In particular, a saturation process of Cu accumulation occurs at environmental exposure levels, unlike Mn and Zn. Statistical analyses performed from field data show that Cu and Zn bioaccumulations may be influenced by a complex combination of geochemical variables, unlike Mn. We conclude that G. pulex is a useful candidate to monitor metal bioavailability in freshwaters due to its responsiveness to low exposures of surrounding environments. Nevertheless, a reliable quantification of bioavailability of essential metals requires characterizing some geochemical effects on metal bioaccumulation.
PY 2014
PD JAN
SO Science Of The Total Environment
SN 0048-9697
PU Elsevier Science Bv
VL 466
UT 000330491600013
BP 100
EP 108
DI 10.1016/j.scitotenv.2013.07.003
ID 29154
ER

EF