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Four Reasons Why Traditional Metal Toxicity Testing with Aquatic Insects Is Irrelevant

机译：与水生昆虫进行传统金属毒性测试无关的四个原因

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摘要

Trace metal contamination of freshwater ecosystems is a problem worldwide, and insects are typically the predominant invertebrate faunal group in these systems. Metals can shape community structure, as evidenced by reduced biodiversity in affected areas. Aquatic insects are often some of the first species to disappear from metal-contaminated sites, despite the fact that laboratory toxiciry tests would suggest that aquatic insects are generally insensitive to metals. In fact, typical laboratory results would indicate that insects only respond to dissolved metals at concentrations orders of magnitude larger than those found in the most insect-depleted contaminated sites. Even with mounting evidence highlighting the obvious disconnect between laboratory toxicity tests and field observations regarding metal toxicity to aquatic insects, water quality criteria for metals continues to rely primarily on toxicity values derived from short term dissolved-only exposures. Below we discuss four key reasons as to why such tests don't provide relevant data for this important faunal group, focusing upon recent advances in our understanding of bioaccumulation and mechanisms of toxicity.
机译：淡水生态系统中的痕量金属污染是世界范围内的一个问题，昆虫通常是这些系统中主要的无脊椎动物动物群。金属可以塑造社区结构，受影响地区生物多样性的减少证明了这一点。尽管实验室毒性测试表明水生昆虫通常对金属不敏感，但水生昆虫通常是从金属污染场所消失的首批物种之一。实际上，典型的实验室结果表明，昆虫仅对溶解的金属做出反应，其浓度要比在大多数昆虫最受污染的地点发现的浓度大几个数量级。即使有越来越多的证据突出表明实验室毒性测试和有关金属对水生昆虫毒性的现场观察之间明显脱节，金属的水质标准仍主要依赖于仅短期溶解暴露得出的毒性值。下面，我们讨论了为何此类测试无法为这个重要的动物群提供相关数据的四个关键原因，重点是我们对生物积累和毒性机理的最新理解。

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  • 来源
    《Environmental Science & Technology》 |2014年第2期|887-888|共2页
  • 作者

    Monica D. Poteat; David B. Buchwalter;

  • 作者单位

    Environmental and Molecular Toxicology Program, Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States;

    Environmental and Molecular Toxicology Program, Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695, 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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