title: Diastereomer-specific bioaccumulation of hexabromocyclododecane (HBCD) in a coastal food web, Western Norway.
abstract: The present study reports diastereomer-specific accumulation of HBCD from a point source in five marine species representing a typical food web in a Norwegian coastal area. Samples of mussels, polychaetes, crabs and seabird eggs were analyzed for the diastereomers α-, β- and γ-HBCD, as well as lipid content and stable isotopes of nitrogen ((15)N/(14)N) to estimate trophic level. Accumulated HBCD did not correlate well with lipid content for most of the species, thus wet-weight based concentrations were included in an assessment of biomagnification. In contrast to β- and γ-HBCD, the α-diastereomer increased significantly with trophic level, resulting in magnification factors >1 in this coastal marine ecosystem. Data for poikilotherms did not show the same positive correlation between the α-diastereomer and trophic position as homeotherms. The apparent biomagnification of the α-HBCD could be due to bioisomerization or diastereomer-specific elimination that differed between poikilotherms and homeotherms.
authors.affiliation: Norwegian Institute for Air Research, NO-2027 Kjeller, Norway. mha@fkd.dep.no
authors.forename: Marianne
authors.initials: M
authors.lastname: Haukås
authors.forename: Ketil
authors.initials: K
authors.lastname: Hylland
authors.forename: Torgeir
authors.initials: T
authors.lastname: Nygård
authors.forename: John Arthur
authors.initials: JA
authors.lastname: Berge
authors.forename: Espen
authors.initials: E
authors.lastname: Mariussen
mesh_terms: D000818:Animals; D046090:Anseriformes / Q000378:metabolism; D001267:Atlantic Ocean; D003386:Brachyura / Q000378:metabolism; D046091:Charadriiformes / Q000378:metabolism; D004784:Environmental Monitoring; D020387:Food Chain; D006842:Hydrocarbons, Brominated / Q000737:chemistry / Q000378:metabolism*; D049880:Mytilus edulis / Q000378:metabolism; D009664:Norway; D011077:Polychaeta / Q000378:metabolism; D013237:Stereoisomerism; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*
chemical_list: D006842:Hydrocarbons, Brominated; D014874:Water Pollutants, Chemical; C089796:hexabromocyclododecane