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A Global, Cross-System Meta-Analysis of Polychlorinated Biphenyl Biomagnification

机译：多氯联苯生物磁化的全球性，跨系统荟萃分析

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摘要

Studies evaluating the mechanisms underpinning the biomagnification of polychlorinated biphenyls (PCBs), a globally prevalent group of regulated persistent organic pollutants, commonly couple chemical and stable isotope analyses to identify bioaccumulation pathways. Due to analytical costs constraining the scope, sample size, and range of congeners analyzed, and variation in methodologies preventing cross-study syntheses, how PCBs biomagnify at food web, regional, and global scales remains uncertain. To overcome these constraints, we compiled diet (stable isotopes) data and lipid-normalized concentrations of sum total PCB (PCB_(sr)), seven indicator PCB congeners, and their sum (PCB_(Σ7)). Our analyses revealed that the number of congeners analyzed, region, and class most strongly predicted PCB_(ST), while similarly, region, class, and feeding location best predicted PCB_(Σ7) and all seven congeners. We also discovered that PCB_(ST), PCB_(Σ7), and the seven indicator congeners all occur in higher concentrations in freshwater than marine ecosystems but are more likely to biomagnify in the latter. Moreover, although the seven congeners vary in their propensity to biomagnify, their trophic magnification factors are all generally greater in the Atlantic than the Pacific. Thus, novel insights regarding PCB biomagnification across taxonomic, food webs, regional, and global scales can be gleaned by leveraging existing data to overcome analytical constraints.
机译：评估基于多氯联苯（PCB）的生物镀锌的机制，全球普遍的持续有机污染物，通常夫妇化学和稳定同位素分析，以鉴定生物累积途径。由于分析成本限制分析的范围，样本大小和分析的同型同源物的范围，以及预防跨研究合成的方法的变化，PCB在食品网，区域和全球尺度上如何生物染色仍然不确定。为了克服这些限制，我们编译饮食（稳定同位素）数据和血脂归一化浓度总PCB（PCB_（SR）），七个指示器PCB同一器，及其总和（PCB_（Σ7））。我们的分析表明，分析的同源者数量，区域和类最强烈地预测的PCB_（ST），而同样，区域，类和喂养位置最佳预测PCB_（Σ7）和所有七个同一器。我们还发现PCB_（ST），PCB_（σ7）和七个指示剂同一剂在淡水中的较高浓度上比海洋生态系统更容易生物染色。此外，尽管七个同一器的倾向于生物镀锌的倾向，但它们的繁殖倍率因素在大西洋中普遍大于太平洋。因此，可以通过利用现有数据来克服分析限制来引入关于跨分类学，食品网，区域和全球尺度的PCB生物磁化的新颖见解。

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  • 来源
    《Environmental Science & Technology》 |2020年第18期|10989-11001|共13页
  • 作者

    Kimberly D. Prince; Shawn D. Taylor; Christine Angelini;

  • 作者单位

    Department of Environmental Engineering Sciences Engineering School for Sustainable Infrastructure and the Environment University of Florida Gainesville Florida 32611 United States;

    School of Natural Resources and Environment University of Florida Gainesville Florida 32611 United States U.S. Department of Agriculture Agricultural Research Service Jornada Experimental Range New Mexico State University Las Cruces New Mexico 88003 United States;

    Department of Environmental Engineering Sciences Engineering School for Sustainable Infrastructure and the Environment University of Florida Gainesville Florida 32611 United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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