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首页> 外文期刊>Environmental toxicology and chemistry >Effects of Non‐native Fish on Lacustrine Food Web Structure and Mercury Biomagnification along a Dissolved Organic Carbon Gradient
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Effects of Non‐native Fish on Lacustrine Food Web Structure and Mercury Biomagnification along a Dissolved Organic Carbon Gradient

机译：非本土鱼对溶解有机碳梯度曲线食品网状结构和汞生物磁化的影响

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摘要

Although the introduction of non-native fish species has been shown to alter trophic ecology in aquatic ecosystems, there has been limited research on how invasive species alter methylmercury (MeHg) biomagnification in lacustrine food webs. We sampled surface water and biota from 8 lakes in Quebec, Canada, spanning a range of dissolved organic carbon (DOC) concentrations (2.9-8.4 mg/L); 4 lakes were inhabited by native brook trout (Salvelinus fontinalis), and the remaining lakes contained brook trout and a non-native fish, Allegheny pearl dace (Margariscus margarita). Periphyton, zooplankton, macroinvertebrates, and fish were analyzed for: 1) stable carbon (delta C-13) and nitrogen (delta N-15) isotope ratios to delineate food webs, and 2) total Hg (THg) or MeHg. Compared with the brook trout from reference lakes, fish from invaded lakes had higher length-standardized THg concentrations as well as a narrower dietary range and elevated trophic level, inferred from unadjusted delta C-13 and delta N-15 values, respectively. The rate of Hg biomagnification was similar across invaded and reference lakes, implying little effect of the invasive fish on the trophic transfer of MeHg. Despite differences in food web structure due to pearl dace invasion, DOC was the strongest predictor of brook trout THg levels for all lakes, suggesting that underlying environmental factors exerted a stronger influence on brook trout THg concentrations than the presence of a non-native forage fish.Environ Toxicol Chem2020;00:1-12. (c) 2020 SETAC
机译：虽然已经显示出在水生生态系统中改变营养生态学的营养生态学，但研究了侵袭性物种在湖泊食物网中的甲基汞（MEHG）生物磁化有限的研究。我们在加拿大魁北克省的8湖中取出地表水和Biota，跨越一系列溶解的有机碳（DOC）浓度（2.9-8.4 mg / L）;天然溪鳟（Salvelinus Fontinalis）居住了4个湖泊，剩下的湖泊包含了Brook Trout和非本土鱼，Allegheny Pearl Dace（Margariscus Margarita）。分析Periphyton，Zooplankton，Macroinvertebrate和鱼：1）稳定的碳（Delta C-13）和氮（Delta N-15）同位素比例，以描述食物纤维网，2）总Hg（THG）或MeHg。与来自参考湖泊的小溪鳟鱼相比，来自入侵湖泊的鱼类具有较高的长度标准化的THG浓度以及较窄的饮食范围和升高的营养水平，分别从不调整的ΔC-13和δn-15值推断出来。侵袭和参考湖泊的HG生物磁化率相似，侵入鱼对Mehg营养转移的影响很小。尽管珍珠DACE入侵由于食品网站结构存在差异，但DOC是所有湖泊的Brook Trout THG水平最强的预测因子，这表明潜在的环境因素对Brook Trout THG浓度的影响力强于非本地饲料鱼类的存在.environ毒素Chem2020; 00：1-12。 （c）2020 Setac

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  • 来源
    《Environmental toxicology and chemistry》 |2020年第11期|2196-2207|共12页
  • 作者

    Barst Benjamin D.; Hudelson Karista; Lescord Gretchen L.; Santa-Rios Andrea; Basu Niladri; Cremazy Anne; Drevnick Paul E.;

  • 作者单位

    Inst Natl Rech Sci Ctr Eau Terre & Environm Quebec City PQ Canada|Univ Alaska Fairbanks Water & Environm Res Ctr Fairbanks AK USA;

    Inst Natl Rech Sci Ctr Eau Terre & Environm Quebec City PQ Canada|Univ Windsor Great Lakes Inst Environm Res Windsor ON Canada;

    Laurentian Univ Vale Living Lakes Ctr Sudbury ON Canada|Wildlife Conservat Soc Canada Ontario Northern Boreal Program Thunder Bay ON Canada;

    McGill Univ Fac Agr & Environm Sci Montreal PQ Canada;

    McGill Univ Fac Agr & Environm Sci Montreal PQ Canada;

    Inst Natl Rech Sci Ctr Eau Terre & Environm Quebec City PQ Canada;

    Inst Natl Rech Sci Ctr Eau Terre & Environm Quebec City PQ Canada|Alberta Environm & Pk Environm Monitoring & Sci Div Calgary AB 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Invasive species; Stable isotopes; Trophic ecology; Brook trout; Methylmercury;

    机译：侵入物种;稳定同位素;营养生态学;Brook Trout;甲基汞;

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