Diastereomer-specific bioaccumulation of hexabromocyclododecane (HBCD) in a coastal food web, Western Norway.
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.
Haukås
Marianne
M
Norwegian Institute for Air Research, NO-2027 Kjeller, Norway. mha@fkd.dep.no
Hylland
Ketil
K
Nygård
Torgeir
T
Berge
John Arthur
JA
Mariussen
Espen
E
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*
D006842:Hydrocarbons, Brominated; D014874:Water Pollutants, Chemical; C089796:hexabromocyclododecane