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首页> 外文期刊>Environmental Science & Technology >Bioaccumulation and Transport of Contaminants: Migrating Sockeye Salmon As Vectors of Mercury
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Bioaccumulation and Transport of Contaminants: Migrating Sockeye Salmon As Vectors of Mercury

机译：生物积累和污染物的运输：迁移鲑鱼作为汞的载体。

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摘要

Biological transport by migratory animals is increasingly recognized as important to the long-range dispersal of toxic contaminants. Mercury (Hg) contamination is a widespread environmental concern with serious health implications for humans and wildlife. Due to their unique life history, anadromous salmon may act as important vectors for this contaminant transferring Hg between marine and freshwater ecosystems. Previous analyses have considered contaminant transport by salmon to be unidirectional. These studies have evaluated Hg import to freshwater by spawning adults, but have not quantitatively assessed export through the migration of juveniles to the ocean. To determine the total Hg burden to freshwater systems by sockeye salmon, we reconstructed the net transport of Hg to the Wood River System in Bristol Bay, Alaska accounting for fluxes in (via adults) and out (via juveniles) of the system. Hg concentrations were higher in juvenile than adult salmon. Hg export from freshwater systems by salmon ranged from 3 to 30% of total import. Proportional export by smote may be higher for populations under heavy exploitation with strong density dependence in juvenile recruitment Full consideration of contaminant loading by migratory species requires attention to the relative contaminant flux at all life history stages and the effects of density dependent growth and survival.
机译：人们日益认识到，迁徙动物的生物运输对有毒污染物的长期扩散至关重要。汞（Hg）污染是一个广泛的环境问题，对人类和野生生物具有严重的健康影响。由于其独特的生活史，鲑鱼可能成为这种污染物在海洋和淡水生态系统之间转移汞的重要媒介。先前的分析认为鲑鱼的污染物运输是单向的。这些研究评估了成年成年虾向淡水的汞进口量，但没有通过少年向海洋的迁移定量评估出口量。为了确定红鲑鱼对淡水系统的总汞负荷，我们重建了汞向阿拉斯加布里斯托尔湾的伍德河系统的净运输量，以解释该系统（通过成年人）和（通过青少年）的通量。少年中的汞浓度高于成年鲑鱼。鲑鱼从淡水系统出口的汞占进口总量的3％至30％。在未成年人的捕捞中，密度密集依赖的种群在重度剥削下的种群中，通过烟雾排放的比例出口可能更高。要充分考虑迁徙物种的污染物负荷，需要注意所有生命历史阶段相对污染物通量以及密度依赖性生长和生存的影响。

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  • 来源
    《Environmental Science & Technology》 |2009年第23期|8840-8846|共7页
  • 作者

    MATTHEW R. BAKER; DANIEL E. SCHINDLER; GORDON W. HOLTGRIEVE; VINCENT L. ST. LOUIS;

  • 作者单位

    School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington;

    School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington;

    Department of Biology, University of Washington, Seattle, Washington;

    Department of Biological Sciences, University of Alberta, Edmonton, Canada;

  • 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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  • 正文语种 eng
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