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首页> 外文期刊>Environmental Science & Technology >Lifetime Chronicles of Selenium Exposure Linked to Deformities in an Imperiled Migratory Fish
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Lifetime Chronicles of Selenium Exposure Linked to Deformities in an Imperiled Migratory Fish

机译：硒暴露终生年表与迁徙鱼类的畸形有关

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摘要

Aquatic ecosystems worldwide face growing threats from elevated levels of contaminants from human activities. Toxic levels of selenium (Se) shown to cause deformities in birds, fish, and mammals can transfer from parents to progeny during embryonic development or accumulate through Se-enriched diets. For migratory species that move across landscapes, tracking exposure to elevated Se is vital to mitigating vulnerabilities. Yet, traditional toxicological investigations resolve only recent Se exposure. Here, we use a novel combination of X-ray fluorescence microscopy and depositional chronology in a biomineral to reveal for the first time provenance, life stage, and duration of toxic Se exposure over the lifetime of an organism. Spinal deformities observed in wild Sacramento Splittail (Pogonichthys macrolepidotus), an imperiled migratory minnow, were attributed to elevated Se acquired through maternal transfer and juvenile feeding on contaminated prey. This novel approach paves the way for diagnosing sources, pathways, and potential for a cumulative exposure of Se relevant for conservation.
机译：全球范围内的水生生态系统面临着来自人类活动的污染物水平升高带来的日益严重的威胁。硒（Se）的有毒水平可导致鸟类，鱼类和哺乳动物畸形，在胚胎发育过程中可从父母转移到子代，或通过富含硒的饮食积累。对于在整个景观中移动的迁徙物种，跟踪暴露于高硒的暴露对于缓解脆弱性至关重要。然而，传统的毒理学研究只能解决最近的硒暴露问题。在这里，我们在生物矿物中使用X射线荧光显微镜和沉积年代学的新颖组合，以首次揭示生物体整个生命周期中有毒硒的来源，生命阶段和暴露时间。在野生萨克拉门托裂尾（（Pogonichthys macrolepidotus）（一种min游的min鱼）中观察到的脊柱畸形，归因于通过母体转移和少年捕食受污染猎物获得的高硒。这种新颖的方法为诊断与保护相关的硒的累积来源，途径和潜力奠定了基础。

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  • 来源
    《Environmental Science & Technology》 |2020年第5期|2892-2901|共10页
  • 作者

    Rachel Cathleen Johnson; A. Robin Stewart; Karin E. Limburg; Rong Huang; Dennis Cocherell; Frederick Feyrer;

  • 作者单位

    Fisheries Ecology Division NOAA Fisheries Southwest Fisheries Science Center Santa Cruz California 9S060 United States Center for Watershed Sciences University of California Davis Davis California 9S616 United States;

    Earth System Processes Division U.S. Geological Survey Menlo Park California 9402S United States;

    State University of New York College of Environmental Science and Forestry Syracuse New York 13210 United States;

    Cornell High Energy Synchrotron Source Cornell University Ithaca New York 148S0 United States;

    Center for Watershed Sciences University of California Davis Davis California 9S616 United States;

    California Water Science Center U.S. Geological Survey Sacramento California 9S819 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);
  • 原文格式 PDF
  • 正文语种 eng
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