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Biotransport of Algal Toxins to Riparian Food Webs

机译：藻毒素向河岸食物网的生物转运

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摘要

The occurrence of harmful algal blooms has resulted In growing worldwide concern about threats to aquatic life and human health. Microcystin (MC), a cyanotoxin, is the most widely reported algal toxin in freshwaters. Prior studies have documented its presence in aquatic food webs including commercially important fish and shellfish. In this paper we present the first evidence that algal toxins propagate into riparian food webs. We show that MC is present in emerging aquatic insects (Hexagenia mayflies) from the James River Estuary and their consumers (Tetragnathidae spiders and Prothonotary Warblers, Protonotaria citrea). MC levels in Prothonotary Warblers varied by age class, with nestlings having the highest levels. At the site where nestlings received a higher proportion of aquatic prey (i.e., mayflies) in their diet, we observed higher MC concentrations in liver tissue and fecal matter. Warbler body condition and growth rate were not related to liver MC levels, suggesting that aquatic prey may provide dietary benefits that offset potential deleterious effects of the toxin. This study provides evidence that threats posed by algal toxins extend beyond the aquatic environments in which blooms occur.
机译：有害藻华的发生导致全世界越来越关注对水生生物和人类健康的威胁。微囊藻毒素（MC）是一种氰毒素，是淡水中报道最广泛的藻毒素。先前的研究已证明其存在于水生食物网中，包括商业上重要的鱼类和贝类。在本文中，我们提供了藻毒素传播到河岸食物网中的第一个证据。我们显示，MC存在于来自詹姆斯河河口及其消费者（四齿spider蜘蛛和Pronotnotary Warblers，Protonotaria citrea）的新兴水生昆虫（Hexagenia mayflies）中。在原鸣鸟中，MC的水平随年龄段的不同而不同，其中雏鸟的水平最高。在雏鸟的饮食中，它们所占比例较高的水生猎物（即may）中，我们观察到肝脏组织和粪便中的MC含量较高。莺的身体状况和生长速度与肝脏MC水平无关，这表明水生猎物可提供饮食益处，以抵消毒素的潜在有害作用。这项研究提供了证据，证明藻毒素构成的威胁超出了发生水华的水生环境。

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  • 来源
    《Environmental Science & Technology》 |2016年第18期|10007-10014|共8页
  • 作者

    Nicholas J. Moy; Jenna Dodson; Spencer J. Tassone; Paul A. Bukaveckas; Lesley P. Bulluck;

  • 作者单位

    Department of Biology, Virginia Commonwealth University, Richmond, Virginia 23284, United States;

    Center for Environmental Studies, Virginia Commonwealth University, Richmond, Virginia 23284, United States;

    Department of Biology, Virginia Commonwealth University, Richmond, Virginia 23284, United States;

    Department of Biology, Virginia Commonwealth University, Richmond, Virginia 23284, United States,Center for Environmental Studies, Virginia Commonwealth University, Richmond, Virginia 23284, United States;

    Department of Biology, Virginia Commonwealth University, Richmond, Virginia 23284, United States,Center for Environmental Studies, Virginia Commonwealth University, Richmond, Virginia 23284, 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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