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首页> 外文期刊>Environmental toxicology and chemistry >AQUATIC TO TERRESTRIAL TRANSFER OF SEDIMENT ASSOCIATED PERSISTENT ORGANIC POLLUTANTS IS ENHANCED BY BIOAMPLIFICATION PROCESSES
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AQUATIC TO TERRESTRIAL TRANSFER OF SEDIMENT ASSOCIATED PERSISTENT ORGANIC POLLUTANTS IS ENHANCED BY BIOAMPLIFICATION PROCESSES

机译：生物放大过程增强了沉积物相关持久性有机污染物的水生向陆地转移

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Ephemeral emergent insects, such as mayflies (Hexagenia spp.), are commonly used as biomonitors of persistent organic pollutants (POPs) and provide a vector for aquatic-terrestrial contaminant transfer. Mayflies bioaccumulate sediment-associated contaminants by bioconcentration and biomagnification during the aquatic stage and concentrate POP residues postemergence due to bioamplification, which occurs as a result of weight and lipid loss without contaminant loss. The present study quantified polychlorinated biphenyl (PCB) bioamplification in male and female emergent mayflies at three sites. Male mayflies used 36 to 68% of their lipids during emergence, with the exception of caged males that were prevented from flight. Females did not lose lipid content between pre-emergent nymph and emerged life stages. Mass balance indicated no PCB elimination between life stages. The mean PCB bioamplification factor, expressed as the ratio of lipid-equivalent PCB concentrations across life stages, was 2.05 ± 0.38 for male imagosymphs and 1.91 ± 0.18 for male imago/subimago life stages. For females, bioamplification factors were close to unity. Wildlife consumers of imago stages of emergent mayflies can potentially increase their total daily intake of PCBs by 36% depending on the sex-ratio composition of their diet relative to animals that feed predominantly on nymph or subimago stages during mass emergence events. Environ. Toxicol. Chem. 2011:30:2167-2174. © 2011 SETAC
机译：临时出没的昆虫，例如may（Hexagenia spp。），通常用作持久性有机污染物（POPs）的生物监测器，并为水生陆地污染物的转移提供载体。在水生阶段可能通过生物浓缩和生物放大来生物积累与沉积物相关的污染物，并由于生物扩增而在芽后浓缩POP残留物，这是由于体重和脂质损失而没有污染物损失的结果。本研究定量了在三个位置的雄性和雌性紧急f中的多氯联苯（PCB）生物扩增。雄性may在出苗期间使用了36％至68％的脂质，但笼中的雄性被阻止逃跑。雌性在萌芽前和生命阶段之间没有失去脂质含量。质量平衡表明生命周期之间没有消除PCB。多氯联苯平均生物放大系数，表示为整个生命阶段的脂质当量多氯联苯浓度之比，雄性成虫/若虫的生命阶段为2.05±0.38，雄性成虫/亚成虫的生命阶段为1.91±0.18。对于女性而言，生物放大因子接近于统一。相对于大规模出苗事件中主要以若虫或亚imago阶段为食的动物，出苗的意象阶段的野生动物消费者有可能将其多氯联苯的每日总摄入量增加36％，具体取决于其饮食的性别比构成。环境。毒药。化学2011：30：2167-2174。 ©2011 SETAC

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