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首页> 外文期刊>Environmental Science & Technology >Emergent Freshwater Insects Serve as Subsidies of Methylmercury and Beneficial Fatty Acids for Riparian Predators Across an Agricultural Gradient
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Emergent Freshwater Insects Serve as Subsidies of Methylmercury and Beneficial Fatty Acids for Riparian Predators Across an Agricultural Gradient

机译：紧急淡水昆虫作为农业梯度的爬堤捕食者的甲基汞和有益脂肪酸的补贴

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摘要

Aquatic-to-terrestrial subsidies have the potential to provide riparian consumers with benefits in terms of physiologically important organic compounds like omega-3 long-chain polyunsaturated fatty acids (n-3 LCPUFAs). However, they also have a "dark side" in the form of exposure to toxicants such as mercury. Human land use intensity may also determine whether subsidies provide benefits or come at a cost for riparian predators. We sampled insects as well as Eastern Phoebe (Sayornis phoebe) chicks in 2015-2016 within the southern Finger Lakes region to understand how food quality, in terms of n-3 LCPUFAs and methylmercury (MeHg), of emergent freshwater insects compared with that of terrestrial insects and how land use affected the quality of prey, predator diet composition, and MeHg exposure. Across the landscape, freshwater insects had a significantly higher percentage of the n-3 LCPUFA eicosapentaenoic acid (EPA) compared to terrestrial insects and contained significantly more MeHg than terrestrial insects did. In spite of differences in MeHg concentrations between aquatic and terrestrial insects, chick MeHg concentrations were not related to diet composition. Instead, chick MeHg concentrations increased with several metrics of human land use intensity, including percent agriculture. Our findings suggest that freshwater subsidies provide predators with both risks and benefits, but that predator MeHg exposure can vary with human land use intensity.
机译：水生到地面补贴有可能在物理上重要的有机化合物（如ω-3长链多不饱和脂肪酸（N-3 LCPUFA）等生理重要的有机化合物方面提供河岸消费者。然而，它们也具有暴露于汞的毒物形式的“黑暗面”。人体土地利用强度也可以确定补贴是否提供福利或以河岸掠食者的费用。我们在南部手指湖区的2015 - 2016年在南部手指区域内采样昆虫以及东部菲比（Sayornis Phoebe）小鸡，以了解粮食质量如何与N-3 LCPUFA和甲基汞（Mehg），与突出的淡水昆虫相比陆地昆虫以及土地利用方式如何影响猎物，捕食者饮食成分和Mehg暴露的质量。与陆生物昆虫相比，淡水昆虫与陆地昆虫相比具有明显较高的N-3 LCPUFFA eicosapentaeno酸（EPA）的百分比，并且含有比陆地昆虫更高的Mehg。尽管水生和陆昆虫之间的MEHG浓度差异，但鸡肉浓度与饮食组合物无关。相反，Chick Mehg浓度随着人类土地利用强度的几个指标而增加，包括农业百分比。我们的研究结果表明，淡水补贴提供了风险和益处的捕食者，但捕食者ehg暴露可能因人土地利用强度而异。

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  • 来源
    《Environmental Science & Technology》 |2021年第9期|5868-5877|共10页
  • 作者

    Cornelia W. Twining; N. Roxanna Razavi; J. Thomas Brenna; Sarah A. Dzielski; Sara T. Gonzalez; Peter Lawrence; Lisa B. Cleckner; Alexander S. Flecker;

  • 作者单位

    Max Planck Institute of Animal Behavior 78315 Radolfzell Germany Limnological Institute University of Konstanz 78464 Konstanz Germany;

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

    Division of Nutritional Sciences Cornell University Ithaca New York 14850 United States University of Texas Austin Dell Pediatric Research Center Austin Texas 78712 United States;

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

    Department of Ecology and Evolutionary Biology University of California Santa Cruz Santa Cruz California 95064 United States;

    Division of Nutritional Sciences Cornell University Ithaca New York 14850 United States;

    Hobart and William Smith Colleges Finger Lakes Institute Geneva New York 14456 United States;

    Department of Ecology and Evolutionary Biology Cornell University Ithaca New York 14850 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
  • 中图分类
  • 关键词

    omega-3 long-chain polyunsaturated fatty acids; methylmercury; emergent freshwater insects; agriculture;

    机译：Omega-3长链多不饱和脂肪酸;甲基汞;紧急淡水昆虫;农业;

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