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首页> 外文期刊>Environmental Science & Technology >What is Causing Biomagnification of Persistent Hydrophobic Organic Chemicals in the Aquatic Environment?
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What is Causing Biomagnification of Persistent Hydrophobic Organic Chemicals in the Aquatic Environment?

机译:在水生环境中引起持久性疏水有机化学物质生物放大的原因是什么?

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摘要

Due to their hydrophobic character, many hydrophobic organic chemicals (HOCs), such as potychlorinated biphe-nyis (PCBs) accumulate in organisms. The most common ways of expressing the degree to which chemicals accumulate in individual species is by means of the bioconcentration factor (BCF) or the bioaccumulation factor (BAF).~1 In addition to accumulation in individual species, PCBs and other persistent HOCs tend to "accumulate in food chains", that is, concentrations in organisms often increase with trophic level.~1 In order to quantify this behavior, the biomagnification factor (BMF) has been denned, which is given by the ratio of the chemical's concentration in an organism and that in its food. Also, so-called trophic magnification factors f TMFs) or food web magnification factors (FWMFs) have been introduced, which widen the scope to the level of a food web by not just looking at one but at several predator-prey combinations. TMFs and FWMFs therefore can be considered as the averaged BMF over different trophic levels.
机译:由于它们的疏水性,许多疏水性有机化学物质(HOC),例如多氯联苯丙氨酸(PCBs)都在生物体内积累。表达单个物种中化学物质积累程度的最常见方法是通过生物富集因子(BCF)或生物积累因子(BAF)。〜1除了单个物种中的积累之外,PCB和其他持久性HOC往往会“在食物链中积累”,也就是说,生物体中的浓度通常随营养水平而增加。〜1为了量化这种行为,已经确定了生物放大因子(BMF),它由化学物质在生物体内的浓度比来确定。生物及其食物中的生物。而且,已经引入了所谓的营养放大倍数(TMF)或食物网放大倍数(FWMF),它们不仅通过观察一个捕食者—猎物的组合,还将范围扩大到食物网的水平。因此,可以将TMF和FWMF视为不同营养水平下的平均BMF。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第1期|p.110-111|共2页
  • 作者

    Michiel T. O.Jonker;

  • 作者单位

    Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80177, 3508 TD, Utrecht, The Netherlands;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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