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2008
Enantioselective Bioaccumulation of Hexabromocyclododecane and Congener-Specific Accumulation of Brominated Diphenyl Ethers in an Eastern Canadian Arctic Marine Food Web
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- The extent of trophic transfer of the three diastereoisomers of hexabromocyclododecane and seven brominated diphenyl ether congeners was examined in components of an Arctic marine food web from eastern Canada. α and γ-HBCD diastereoisomers were detected in all species and total HBCD concentrations ranged from 0.6 ± 0.2 pg/g in arctic cod to 3.9 ± 0.9 ng/g in narwhal. β-HBCD was below method detection limits in all the samples
- The relative trophic status of biota was determined by nitrogen stable isotopes, and results indicated clear differences in HBCD isomer and BDE congener profiles with trophic level
- Trophic magnification was observed for the α-diastereoisomer and BDE-47 as concentrations increased with increasing TL in the food web, whereas there was trophic dilution of γ-HBCD and BDE-209 through the food web
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