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首页> 外文期刊>Environmental Science & Technology >Calibration of the Gastrointestinal Magnification Model to Predict Maximum Biomagnification Potentials of Polychlorinated Biphenyls in a Bird and Fish
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Calibration of the Gastrointestinal Magnification Model to Predict Maximum Biomagnification Potentials of Polychlorinated Biphenyls in a Bird and Fish

机译：胃肠道放大率模型的校准，以预测鸟类和鱼类中多氯联苯的最大生物放大率

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摘要

The gastrointestinal magnification (Gl-magnification) model was calibrated in ring doves and Japanese koi using matched data on dietary assimilation and fecal depuration of polychlorinated biphenyls (PCBs). Mass transport parameters describing PCB flux from gut contents to organism (D'_(go); mol d~(-1) Pa~(-1)) and organism to gut contents (D_(og); mol d~(-1) Pa~(-1)) were quantified to test the hypothesis that the ratio of these two terms approached unity. For birds, D'(go)/D_(og) ranged from 2.9 to 6.3 and for fish the ratios ranged from 0.7 to 3.1. In both species, the ratio commonly exceeded 1. The GI-magnification model was used to predict maximum PCB biomagnification factors (BMF_(max)) for each species which ranged from 18.5 to 33.8 for ring doves and 7.9 to 14.8 for Japanese koi. Chemical losses via respiration reduced steady state biomagnification factor (BMF.J estimates by a negligible amount in birds, whereas for fish, predicted BMF_(ss) decreased to values from 0.5 to 7.2. This study demonstrated that chemical transfer efficiency during assimilation exceeds organism/feces transfer which contributes to elevated PCB biomagnification potentials in birds and fish. Combined with reduced losses of chemical across respiratory surfaces, higher D'_(go)/D_(og) ratios of birds contribute to elevated biomagnification in birds over fish.
机译：使用多氯联苯（PCB）的膳食同化和粪便净化的匹配数据，在环斑鸠和日本锦鲤中对胃肠道放大率（G1放大）模型进行了校准。传质参数描述了从肠道内容物到生物体（D'_（go）; mol d〜（-1）Pa〜（-1））和从生物体到肠道内容物（D_（og）; mol d〜（-1）的PCB通量）Pa〜（-1））被量化以检验这两个项之比接近统一的假设。对于鸟类，D'（go）/ D_（og）的范围为2.9至6.3，对于鱼类，D'（go）/ D_（og）的范围为0.7至3.1。在这两个物种中，该比率通常超过1。GI放大模型用于预测每种物种的最大PCB生物放大系数（BMF_（max）），环斑鸠的范围为18.5至33.8，日本锦鲤的范围为7.9至14.8。呼吸作用造成的化学损失降低了稳态生物放大系数（BMF.J在鸟类中的估量可忽略不计，而对于鱼类，预测的BMF_（ss）从0.5降低至7.2。该研究表明，同化过程中的化学转移效率超过了生物体/粪便转移有助于提高鸟类和鱼类体内PCB的生物放大潜力，再加上减少呼吸道表面化学物质的损失，提高鸟类的D'_（go）/ D_（og）比率有助于提高鸟类对鱼类的生物放大率。

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  • 来源
    《Environmental Science & Technology》 |2012年第18期|p.10279-10286|共8页
  • 作者

    Ken G. Drouillard; Gord Paterson; Jian Liu; G. Douglas Haffner;

  • 作者单位

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4;

  • 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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