title: Biomagnification of polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls in a highly contaminated freshwater food web from South China.
abstract: To evaluate the biomagnification extent of polybrominated diphenyls ethers (PBDEs) and polychlorinated biphenyls (PCBs) in a highly contaminated freshwater food web from South China, trophic magnification factors (TMFs) for 18 PBDE congeners and 53 PCB congeners were calculated. The TMF values ranged 0.26-4.47 for PBDEs and 0.75-5.10 for PCBs. Forty-five of 53 PCBs and BDEs 47, 100 and 154 had TMFs greater than one, suggesting their biomagnification in the present food web. The TMFs for PBDEs were generally smaller than those for PCBs with the same degree of halogenation, indicating a lower biomagnification potential for PBDEs compared to PCBs. For PCBs, it followed a parabolic relationship between TMFs and logK(OW) (octanol-water partition coefficient). However, this relationship was not significant for PBDEs, possibly due to the more complex behaviors of PBDEs in the food web (e.g., metabolism), compared to that of PCBs.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Jiang-Ping
authors.initials: JP
authors.lastname: Wu
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Luo
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Mei
authors.initials: M
authors.lastname: Yu
authors.forename: She-Jun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
authors.forename: Zhong-Yi
authors.initials: ZY
authors.lastname: Yang
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis; D002681:China; D003445:Crustacea / Q000378:metabolism; D054750:Ecotoxicology / Q000379:methods; D005399:Fishes / Q000378:metabolism*; D020387:Food Chain; D005618:Fresh Water; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000633:toxicity*; D009587:Nitrogen Isotopes / Q000032:analysis; D011075:Polybrominated Biphenyls / Q000032:analysis / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000633:toxicity*; D012908:Snails / Q000378:metabolism; D012911:Snakes / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D015415:Biomarkers; D055768:Halogenated Diphenyl Ethers; D009587:Nitrogen Isotopes; D011075:Polybrominated Biphenyls; D014874:Water Pollutants, Chemical; C517827:pentabrominated diphenyl ether 100; C511295:2,2',4,4'-tetrabromodiphenyl ether; D011078:Polychlorinated Biphenyls; C533761:hexabromodiphenyl ether 154