State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.
Environ Toxicol Chem. 2013 Jul;32(7):1655-62. doi: 10.1002/etc.2227. Epub 2013 May 28.
The Dinghushan Biosphere Reserve is a nature reserve and a site for the study of tropical and subtropical forest ecosystems. Rapid industrialization and intensive electronic waste-recycling activities around the biosphere reserve have resulted in elevated levels of industrial organic contaminants in the local environment that may cause adverse effects on wildlife that inhabits this area. In the present study, polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and 2 alternative brominated flame retardants (BFRs)-decabromodiphenyl ethane (DBDPE) and 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE)-were investigated in the biosphere reserve and a reference site by using the kingfisher (Alcedo atthis) as a bioindicator. Residue concentrations in kingfishers from the Dinghushan Biosphere Reserve ranged from 490 ng/g to 3000 ng/g, 51 ng/g to 420 ng/g, 0.44 ng/g to 90 ng/g, and 0.04 ng/g to 0.87 ng/g lipid weight for ∑PCBs, ∑PBDEs, DBDPE, and BTBPE, respectively. With the exception of the BTBPE, these levels were 2 to 5 times higher than those detected in kingfishers from the reference site. The contaminant patterns from the biosphere reserve were also different, with larger PCB contributions in comparison with the reference site. The estimated predator-prey biomagnification factors (BMFs) showed that most of the PCB and PBDE congeners and BTBPE were biomagnified in kingfishers from the biosphere reserve. The calculated toxic equivalent quantity (TEQ) concentrations of major coplanar PCB congeners in kingfishers from the biosphere reserve ranged from 18 pg/g to 66 pg/g wet weight, with some of these TEQ concentrations reaching or exceeding the levels known to impair bird reproduction and survival.
鼎湖山生物圈保护区是一个自然保护区和一个研究热带和亚热带森林生态系统的场所。由于生物圈保护区周围的工业化和电子废物回收活动的密集化，当地环境中的工业有机污染物水平升高，可能对栖息在该地区的野生动物产生不利影响。在本研究中，使用翠鸟（Alcedo atthis）作为生物指示剂，研究了生物圈保护区和参考点的多氯联苯（PCBs）、多溴二苯醚（PBDEs）和 2 种替代溴化阻燃剂（DBDPE 和 BTBPE）。鼎湖山生物圈保护区翠鸟体内的残留浓度范围为 490ng/g 至 3000ng/g、51ng/g 至 420ng/g、0.44ng/g 至 90ng/g 和 0.04ng/g 至 0.87ng/g 脂肪重量，分别为∑PCBs、∑PBDEs、DBDPE 和 BTBPE。除 BTBPE 外，这些水平均比参考点检测到的水平高 2 至 5 倍。生物圈保护区的污染物模式也有所不同，与参考点相比，PCB 的贡献更大。估计的捕食者-猎物生物放大因子（BMF）表明，生物圈保护区的翠鸟体内大多数 PCB 和 PBDE 同系物和 BTBPE 都有生物放大作用。从生物圈保护区的翠鸟体内计算出的主要共平面 PCB 同系物的毒性当量浓度（TEQ）范围为 18pg/g 至 66pg/g 湿重，其中一些 TEQ 浓度达到或超过已知会损害鸟类繁殖和生存的水平。
