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首页> 外文期刊>Environmental Science & Technology >Sterols and Stanols Preserved in Pond Sediments Track Seabird Biovectors in a High Arctic Environment
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Sterols and Stanols Preserved in Pond Sediments Track Seabird Biovectors in a High Arctic Environment

机译:在高北极环境中,池塘沉积物中保存的甾醇和甾烷醇追踪海鸟生物载体

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摘要

Seabirds are major vertebrates in the coastal ecosystems of the Canadian High Arctic, where they transport substantial amounts of marine-derived nutrients and pollutants from oceans to land by depositing guano and stomach oils to their nesting area, which often includes nearby freshwater ponds. Here we present novel indicators for evaluating the impact of seabirds on freshwater ecosystems. The ratio of cholesterol/(cholesterol + sitosterol) in pond sediments showed significant enrichment near a nesting colony of northern fulmars (Fulmarus glacialis) and was significantly correlated with ornithogenic enrichment of sediment as determined by sedimentary δ~(15)N. The sterol ratio was also correlated with several bioaccumulative persistent organic pollutants (POPs), suggesting its usefulness in tracking biovector enrichment of contaminants. Human-derived epicoprostanol was also analyzed in the sediments, and its relationship with an abandoned, prehistoric camp was recorded, suggesting its potential as a tracer of prehistoric human activities in the Arctic. Sterols and stanols preserved in sediments appear to be useful geochemical tools that will inform our understanding of migratory species and the presence of prehistoric human populations in the Arctic, and possibly other animal populations.
机译:海鸟是加拿大高北极地区沿海生态系统中的主要脊椎动物,它们通过将鸟粪和胃油沉积到它们的筑巢区(通常包括附近的淡水池塘)中,将大量海洋来源的养分和污染物从海洋运输到陆地。在这里,我们提出了用于评估海鸟对淡水生态系统影响的新颖指标。池塘沉积物中胆固醇/(胆固醇+谷固醇)的比值在北部富马(Fulmarus glacialis)的巢殖民地附近显示出明显的富集,并且与沉积物δ〜(15)N的鸟生性富集显着相关。固醇比还与几种生物累积性持久性有机污染物(POPs)相关,表明其可用于跟踪生物载体中污染物的富集。还对沉积物中的人源表古前列腺素进行了分析,并记录了其与废弃的史前营地的关系,这表明它有可能成为北极史前人类活动的追踪者。保存在沉积物中的甾烷醇和甾烷醇似乎是有用的地球化学工具,将有助于我们了解迁徙物种以及北极以及其他动物种群可能存在的史前人类种群。

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  • 来源
    《Environmental Science & Technology》 |2016年第17期|9351-9360|共10页
  • 作者单位

    Department of Biology, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada;

    Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Department of Biology, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada;

    Department of Biology, Acadia University, Wolfville, Nova Scotia B4P 2R6, Canada;

    Paleoecological Environmental Assessment and Research Lab (PEARL), Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada;

    Department of Biology, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada;

    Key Laboratory of Environment and Resources on Tibetan Plateau, Qinghai Normal University, Xining 810008, China;

    Department of Biology, University of Ottawa, Ottawa, Ontario K1N 6N5, 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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