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首页> 外文期刊>Environmental toxicology and chemistry >MERCURY CONCENTRATIONS IN LANDLOCKED ARCTIC CHAR (SALVELINUS ALPINUS) FROM THE CANADIAN ARCTIC. PART I: INSIGHTS FROM TROPHIC RELATIONSHIPS IN 18 LAKES
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MERCURY CONCENTRATIONS IN LANDLOCKED ARCTIC CHAR (SALVELINUS ALPINUS) FROM THE CANADIAN ARCTIC. PART I: INSIGHTS FROM TROPHIC RELATIONSHIPS IN 18 LAKES

机译：来自加拿大北极的内陆北极红点鲑（SALVELINUS ALPINUS）中的汞含量。第一部分：来自18个湖的营养关系的见解

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摘要

Concentrations of mercury (Hg) have increased slowly in landlocked Arctic char over a 10- to 15-year period in the Arctic. Fluxes of Hg to sediments also show increases in most Arctic lakes. Correlation of Hg with trophic level (TL) was used to investigate and compare biomagnification of Hg in food webs from lakes in the Canadian Arctic sampled from 2002 to 2007. Concentrations of Hg (total Hg and methylmercury [MeHg]) in food webs were compared across longitudinal and latitudinal gradients in relation to δ~(13)C and δ~(15)N in periphyton, zooplankton, benthic invertebrates, and Arctic char of varying size-classes. Trophic magnification factors (TMFs) were calculated for the food web in each lake and related to available physical and chemical characteristics of the lakes. The relative content of MeHg increased with trophic level from 4.3 to 12.2% in periphyton, 41 to 79% in zooplankton, 59 to 72% in insects, and 74 to 100% in juvenile and adult char. The δ~(13)C signatures of adult char indicated coupling with benthic invertebrates. Cannibalism among char lengthened the food chain. Biomagnification was confirmed in all 18 lakes, with TMFs ranging from 3.5 ± 1.1 to 64.3 ± 0.8. Results indicate that TMFs and food chain length (FCL) are key factors in explaining interlake variability in biomagnification of [Hg] among different lakes.
机译：在北极的内陆煤焦中，汞的浓度在10到15年的时间内缓慢增加。在大多数北极湖中，汞向沉积物的通量也显示出增加。使用汞与营养水平（TL）的相关性来调查和比较2002年至2007年加拿大北极地区湖泊食物网中汞的生物放大倍数。比较了食物网中汞的浓度（总汞和甲基汞[MeHg]）在不同大小级别的浮游生物，浮游动物，底栖无脊椎动物和北极炭中，与δ〜（13）C和δ〜（15）N相关的纵向和横向梯度。计算每个湖泊食物网的营养放大系数（TMF），并与湖泊的可用物理和化学特征相关。 MeHg的相对含量随营养水平的增加而在围生植物中从4.3％上升到12.2％，在浮游动物中从41％上升到79％，在昆虫中从59％上升到72％，在少年和成年炭黑中上升74％到100％。成年煤char的δ〜（13）C特征表明与底栖无脊椎动物耦合。炭火人之间的自相残杀拉长了食物链。在所有18个湖泊中都确认了生物放大作用，TMF范围从3.5±1.1到64.3±0.8。结果表明，TMF和食物链长度（FCL）是解释不同湖泊之间[Hg]生物放大率的湖间变异性的关键因素。

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  • 来源
    《Environmental toxicology and chemistry》 |2010年第3期|p.621-632|共12页
  • 作者

    NIKOLAUS GANTNER; MICHAEL POWER; DEBORAH IQALUK; MARKUS MEILI; HANS BORG; MARCUS SUNDBOM; KEITH R. SOLOMON; GREG LAWSON; DEREK C. MUIR;

  • 作者单位

    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada Water Science and Technology Directorate, Environment Canada, Burlington, Ontario L7R 4A6;

    Department of Biology, University of Waterloo, Waterloo, Ontario N2L 3G1 Canada;

    Hamlet of Resolute Bay, Resolute Bay, Nunavut XOA 0V0 Canada;

    Applied Environmental Science (ITM), SE-106 91, Stockholm University, Stockholm, Sweden;

    Applied Environmental Science (ITM), SE-106 91, Stockholm University, Stockholm, Sweden;

    Applied Environmental Science (ITM), SE-106 91, Stockholm University, Stockholm, Sweden;

    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada;

    Water Science and Technology Directorate, Environment Canada, Burlington, Ontario L7R 4A6;

    Department of Environmental Biology, University of Guelph, Guelph, Ontario NIG 2W1, Canada Water Science and Technology Directorate, Environment Canada, Burlington, Ontario L7R 4A6;

  • 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

    mercury; arctic char; biomagnification; food chain length; climate change;

    机译：汞;北极炭生物放大食物链长度;气候变化;

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