Article (Scientific journals)
Bioaccumulation of polybrominated diphenyl ethers (PBDEs) in Gammarus pulex: Relative importance of different exposure routes and multipathway modeling
Lebrun, Jérémie; Leroy, Delphine; Giusti, Arnaud et al.
2014In Aquatic Toxicology, 154, p. 107-113
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Keywords :
Biomonitor; Biodynamic model; Toxicokinetics; Dietary exposure; Persistent organic pollutants; Freshwater invertebrate
Abstract :
[en] Characterizing the exposure routes of an organism and its ability to regulate accumulated contaminants is a crucial step toward developing a biomonitor. To date, very little data are available on the bioaccumulation kinetics of PBDEs in freshwater biota. This study aims at investigating the potential use of a litter-degrader widely distributed in European freshwaters, Gammarus pulex, as an indicator of exposure to PBDEs. In aquatic microcosms, gammarids were exposed to a mixture of brominated congeners (BDE-28, 47, 66, 85, 99, 100, 153, 154 and 183) to assess their ability to bioconcentrate PBDEs. Results show that all tested congeners are highly internalized by G. pulex and uptake rates of PBDEs are closely related to their partition coefficients (Kow). The determination of the elimination rate of BDE-47, the congener most readily accumulated by gammarids, indicated that metabolism and excretion of this congener are low in G. pulex, which argues in favor of its use as a quantitative biomonitor. Finally, bioaccumulation experiments were performed using contaminated leaves to determine the relative importance of dietary uptake in the contamination of gammarids. Even though water is the preeminent exposure route, a significant uptake of BDE-47 through food was observed (27%). We propose a biodynamic model that takes into account both exposure routes to describe BDE-47 bioaccumulation. This study supports the use of this ubiquitous amphipod as an early warning monitor of the bioavailable contamination of freshwaters by PBDEs.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Lebrun, Jérémie;  IRSTEA
Leroy, Delphine;  Institut scientifique du Service Publique
Giusti, Arnaud ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Département de Biologie, Ecologie et Evolution
Gourlay-Francé, Catherine;  ANSES
Thomé, Jean-Pierre ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecologie animale et écotoxicologie
Language :
English
Title :
Bioaccumulation of polybrominated diphenyl ethers (PBDEs) in Gammarus pulex: Relative importance of different exposure routes and multipathway modeling
Publication date :
September 2014
Journal title :
Aquatic Toxicology
ISSN :
0166-445X
eISSN :
1879-1514
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
154
Pages :
107-113
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 May 2014

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