Bioaccumulation behavior of polybrominated diphenyl ethers (PBDEs) in the freshwater food chain of Baiyangdian lake, north China.
Polybrominated diphenyl ethers (PBDEs) are of great environmental concern due to bioaccumulation in different food chains. Trophodynamics of PBDEs in freshwater food chain is an important criterion for assessing their ecological risk. In the study, PBDEs were analyzed in sixteen aquatic species collected from Baiyangdian Lake, North China. The concentrations of nine PBDE congeners (BDE-28, -47, -66, -99, -100, -85, -153, -154, and -183) in aquatic organisms ranged from 3.4 to 160.2ng/g lipid weight. BDE-47 was the predominant PBDE congener in most samples except for river snails and swan mussels. BDE-209 was detected in 50% of biota samples, which indicated the bioavailability of BDE209. Correlation between lipid-normalized concentrations of PBDEs and trophic levels determined by stable isotope nitrogen technologies confirmed that PBDEs were biomagnified in the freshwater food chain. The trophic magnification factors (TMFs) ranged from 1.3 to 2.1 for PBDE congeners, greater than one, indicating the biomagnification potential for the PBDE congeners in the freshwater food chain. The relationship between TMFs and Log K(ow) (octanol-water partition coefficient) indicated that the phenomenon of trophic magnification for lowly brominated congeners was obvious in the freshwater food chain.
Hu
Guo-Cheng
GC
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China; Metropolitan Environment Center, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, PR China.
Dai
Jia-Yin
JY
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.
Xu
Zhen-Cheng
ZC
Metropolitan Environment Center, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, PR China.
Luo
Xiao-Jun
XJ
State Key Laboratory of Organic Chemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China.
Cao
Hong
H
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.
Wang
Jian-She
JS
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China.
Mai
Bi-Xian
BX
State Key Laboratory of Organic Chemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China. Electronic address: nancymai@gig.ac.cn.
Xu
Mu-Qi
MQ
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China. Electronic address: xumq@ioz.ac.cn.
D000818:Animals; D000835:Animals, Wild; D002681:China; D004781:Environmental Exposure; D020387:Food Chain; D005618:Fresh Water; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D008386:Marine Biology; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical