title: Bioaccumulation of polybrominated diphenyl ethers by the freshwater benthic amphipod Gammarus pulex.
abstract: This study reports on the relationship between polybrominated diphenyl ether (PBDE) levels in water, sediment, and the benthic macroinvertebrate Gammarus pulex, which plays a major ecological role in freshwater ecosystems. Samples were taken in a periurban watershed (near Paris, France), and PBDEs were systematically detected in sediment (≤727 ng g(-1) OC) and G. pulex (≤264 ng g(-1) lipids). PBDEs were also occasionally detected in the water column at low levels (∑ PBDEs < 1.5 ng L(-1)). The log values of bioaccumulation factors were in the range 7.8 ± 0.1-8.3 ± 0.4 L kg(-1) for tetra- and penta-BDEs, which were the only ones quantified in the dissolved phase of river water. Meanwhile, levels of individual tri- to hepta-PBDE congeners in G. pulex generally positively correlated with sediment levels, suggesting an equilibrium situation. Biota-to-sediment accumulation factors (BSAFs) of tri-hepta BDEs were congener specific and were in the range 0.5 ± 0.3-2.6 ± 1.2. For several PBDEs, BSAF values deviated from the expected range, likely because of in vivo metabolism.
authors.affiliation: UMR Sisyphe, CNRS/UPMC, Université Pierre et Marie Curie, Paris, France. khaoula.tlili@upmc.fr
authors.forename: Khawla
authors.initials: K
authors.lastname: Tlili
authors.forename: Pierre
authors.initials: P
authors.lastname: Labadie
authors.forename: Catherine
authors.initials: C
authors.lastname: Bourges
authors.forename: Annie
authors.initials: A
authors.lastname: Desportes
authors.forename: Marc
authors.initials: M
authors.lastname: Chevreuil
mesh_terms: D033304:Amphipoda / Q000378:metabolism*; D000818:Animals; D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry; D055768:Halogenated Diphenyl Ethers / Q000032:analysis* / Q000493:pharmacokinetics*; D010297:Paris; D011786:Quality Control; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical