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首页> 外文期刊>Environmental toxicology and chemistry >SPATIAL AND TEMPORAL VARIATIONS OF TOTAL AND METHYLMERCURY CONCENTRATIONS IN PLANKTON FROM A MERCURY-CONTAMINATED AND EUTROPHIC RESERVOIR IN GUIZHOU PROVINCE, CHINA
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SPATIAL AND TEMPORAL VARIATIONS OF TOTAL AND METHYLMERCURY CONCENTRATIONS IN PLANKTON FROM A MERCURY-CONTAMINATED AND EUTROPHIC RESERVOIR IN GUIZHOU PROVINCE, CHINA

机译：贵州省富营养化水库浮游生物总汞和甲基汞浓度的时空变化

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摘要

Total mercury (THg) and methylmercury (MeHg) concentrations in four size fractions of plankton from three sampling stations in the Hg-contaminated and eutrophic Baihua Reservoir, Guizhou, China, were investigated for biomagnification and trophic transfer of Hg at different sites with various proximity to the major point sources of nutrients and metals. Total Hg concentrations in plankton of the various size fractions varied from 49 to 5,504 ngg~(-1) and MeHg concentrations ranged from 3 to 101 ng g~(-1). The percentage of Hg as MeHg varied from 0.16 to 70%. Total Hg and MeHg concentrations in plankton samples differed among the three sampling stations with different proximities from the major point sources. The plankton from the site closest to the dam contained the highest concentrations of MeHg. The successive increase of the ratios of MeHg to Hg from seston to macroplankton at all sites indicated that biomagnification is occurring along the plankton food web. However, biomagnification factors (BMF) for MeHg were low (1.5-2.0) between trophic levels. Concentrations of THg in seston decreased with an increase of chlorophyll concentrations, suggesting a significant dilution effect by the algae bloom for Hg. Eutrophication dilution may be a reason for lower MeHg accumulation by the four size classes of plankton in this Hg-contaminated reservoir.
机译：研究了贵州百花水库三处污染和富营养化的三个采样站浮游生物的四个大小部分中总汞（THg）和甲基汞（MeHg）浓度在不同位置，不同距离附近对汞的生物放大和营养转移的影响。营养和金属的主要来源。浮游生物中不同大小分数的总Hg浓度范围从49到5,504 ngg〜（-1），MeHg浓度范围从3到101 ng g〜（-1）。汞作为MeHg的百分比从0.16％到70％不等。在三个采样站之间，浮游生物样品中的总Hg和MeHg浓度有所不同，与主要点源的接近程度也不同。最靠近水坝的地点的浮游生物含有最高浓度的甲基汞。在所有地点，从硒到大型浮游生物的MeHg与Hg的比例连续增加，表明沿浮游生物食物网发生了生物放大作用。但是，MeHg的生物放大因子（BMF）在营养级之间较低（1.5-2.0）。随着叶绿素浓度的增加，THTH的浓度降低，这表明藻类水华对Hg具有明显的稀释作用。富营养化的稀释可能是在这个受Hg污染的储层中浮游生物的四个大小类别导致MeHg积累较低的原因。

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  • 来源
    《Environmental toxicology and chemistry》 |2011年第12期|p.2739-2747|共9页
  • 作者

    QING WANG; XINBIN FENG; YUFENG YANG; HAIYU YAN;

  • 作者单位

    Institute of Hydrobiology, Jinan University, Guangzhou, China,Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms, Guangdong Higher Education Institutes, Guangzhou, China;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China;

    Institute of Hydrobiology, Jinan University, Guangzhou, China,Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms, Guangdong Higher Education Institutes, Guangzhou, China;

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China;

  • 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; plankton; biomagnification; eutrophication; site-specific;

    机译：汞;浮游生物生物放大富营养化特定地点;

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