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首页> 外文期刊>Environmental Science & Technology >Trophodynamics off Polybrominated Diphenyl Ethers in the Marine Food Web of Bohai Bay, North China
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Trophodynamics off Polybrominated Diphenyl Ethers in the Marine Food Web of Bohai Bay, North China

机译：华北渤海湾海洋食物网中多溴联苯醚的营养动力学

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Polybrominated diphenyl ethers (PBDEs) are of great environmental concern due to the exponential increase of the concentrations in the environment, especially in high trophic level organisms, and the trophodynamics of these chemicals in aquatic food webs is an important criterion for assessing their ecological risk. This study analyzed 13 PBDEs in the zooplankton, five invertebrate species, six fish species, and one marine bird species collected from Bohai Bay. PBDE concentrations in organisms from Bohai Bay (∑PBDEs: 0.15-32.8 ng/g lipid weight) were low compared with other marine organisms worldwide, and BDE-47wasthe predominant compound in most samples, followed by BDE-28,BDE-99/BDE-100, and BDE-119. Correlation between lipid-normalized concentrations of PBDEs, and trophic levels determined by stable nitrogen isotope technologies confirmed that PBDEs were biomagnified in the marine food web. Significantly positive relationships were found fortotal PBDEs and four PBDE compounds (BDE-28, BDE-47, BDE-100, and BDE-119), and their trophic magnification factors (TMFs) were 3.53, 3.57, 7.24, 3.23, and 2.60, respectively. The concentration ratios between congeners (BDE-99/BDE-100 and BDE-99/BDE-47) were found to decrease with increasing trophic levels, suggesting that trophic-level-dependent concentrations ratios between BDE-99 and BDE-100 would be contributed by trophic level-dependent biotransformation between BDE-99 and BDE-47, and therefore resulting in the dominance of BDE-100 compared with BDE-99 and the relatively high trophic magnification of BDE-47 in the marine food web.
机译：多溴联苯醚（PBDEs）由于环境中，尤其是高营养水平生物中的浓度呈指数增加而引起了极大的环境关注，这些化学物质在水生食物网中的营养动力学是评估其生态风险的重要标准。这项研究分析了从渤海湾采集的浮游动物中的13种多溴二苯醚，5种无脊椎动物，6种鱼类和1种海洋鸟类。与全球其他海洋生物相比，渤海湾地区生物中的PBDE浓度（∑PBDEs：0.15-32.8 ng / g脂质重量）低，并且BDE-47是大多数样品中的主要化合物，其次是BDE-28，BDE-99 / BDE -100和BDE-119。脂质标准化的多溴二苯醚浓度与通过稳定氮同位素技术确定的营养水平之间的相关性证实，多溴二苯醚在海洋食物网中被生物放大。 PBDEs和四种PBDEs化合物（BDE-28，BDE-47，BDE-100和BDE-119）之间存在显着正相关，其营养放大倍数（TMF）为3.53、3.57、7.24、3.23和2.60，分别。发现同族元素（BDE-99 / BDE-100和BDE-99 / BDE-47）之间的浓度比随营养水平的升高而降低，这表明BDE-99和BDE-100之间依赖营养水平的浓度比应为由BDE-99和BDE-47之间的营养水平依赖性生物转化引起，因此导致BDE-100与BDE-99相比占优势，并且在海洋食物网中BDE-47的营养放大倍数较高。

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