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首页> 外文期刊>Lakes & Reservoirs >Lake-specific responses in sedimentary sulphur, after additions of copper sulphate to lakes in Michigan, USA
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Lake-specific responses in sedimentary sulphur, after additions of copper sulphate to lakes in Michigan, USA

机译：在美国密歇根州的湖泊中添加硫酸铜后，湖泊中沉积硫的响应

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摘要

Copper sulphate (CUSO_4) is commonly added to lakes and reservoirs to manage nuisance and exotic species. Several studies have previously reported that CuSO_4 is very useful for this purpose, and that the copper is ultimately stored in lake sediments. In contrast, there has been little study on the fate of the sulphate from CuSO_4 additions. The purpose of this study was to elucidate the effects of CuSO_4 additions on sedimentary sulphur. Concentrations, isotopes, and fluxes of total and reduced sulphur in sediment cores from four Michigan lakes were compared, including two reference lakes that have never received CuSO_4 additions, and two treatment lakes that have received CuSO_4 additions by lake managers totalling 1-3 kg sulphate ha~(-1) year~(-1) since 1940. The results of this study confirm that sediments do not consistently provide records of sulphate loading across lakes. Isotopic evidence indicates this inconsistency is caused, in part, by lakes with well-mixed sediments, in which sulphate is reduced to sulphide, but then subsequently reoxidized to sulphate and remobilized to the overlying water column. One of the treatment lakes, however, exhibited a clear correlation between CuSO_4 additions and an increased sulphur flux to the sediment. During any given year, however, the sulphate added from CuSO_4 additions amounted to no more than 10% of the sulphate added from wet deposition. Based on this seemingly insignificant quantity of sulphate, ascribing any effect of CuSO_4 additions on sedimentary sulphur is tenuous at best. One possibility is that the addition of CuSO_4 at rates that do not overwhelm the natural sulphur cycle of a lake or reservoir is a reasonable management tool for nuisance and exotic species.
机译：硫酸铜（CUSO_4）通常添加到湖泊和水库中，以管理令人讨厌的物种和外来物种。先前有几项研究报告说，CuSO_4对于此目的非常有用，并且铜最终存储在湖泊沉积物中。相反，关于CuSO_4添加物中硫酸盐命运的研究很少。这项研究的目的是阐明添加CuSO_4对沉积硫的影响。比较了来自四个密歇根湖的沉积物芯中总硫和还原硫的浓度，同位素以及总通量和还原硫通量，其中包括两个从未接受过CuSO_4添加的参考湖，以及两个处理过的湖经管理人员总共添加了1-3千克硫酸盐的CuSO_4的处理湖。自1940年以来已经达到（-1）年（-1）年。这项研究的结果证实，沉积物并不能始终如一地提供湖泊中硫酸盐含量的记录。同位素证据表明，这种不一致的部分原因是沉积物混合均匀的湖泊，其中的硫酸盐被还原为硫化物，但随后被重新氧化为硫酸盐并被迁移到上覆的水柱中。但是，其中一个处理湖在CuSO_4的添加量和增加的向沉积物中的硫通量之间表现出明显的相关性。但是，在任何给定年份，从CuSO_4添加物中添加的硫酸盐总计不超过从湿法沉积中添加的硫酸盐的10％。基于这种看似微不足道的硫酸盐量，将CuSO_4添加对沉积硫的任何影响充其量是微不足道的。一种可能性是，添加CuSO_4的速度不会使湖泊或水库的自然硫循环不堪重负，这是处理令人讨厌和外来物种的合理管理工具。

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  • 来源
    《Lakes & Reservoirs》 |2009年第3期|193-201|共9页
  • 作者

    Paul E. Drevnick; Ryan R. Otter; Patrick R. Gorski; David T. Long; Donald E. Canfield; James T. Oris;

  • 作者单位

    Department of Zoology, Miami University, Oxford, Ohio Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, Massachusetts;

    Department of Zoology, Miami University, Oxford, Ohio Department of Biology, Middle Tennessee State University, Murfreesboro, Tennessee;

    Environmental Chemistry and Technology Program, University of Wisconsin, Madison, Wisconsin;

    Department of Geological Sciences, Michigan State University, East Lansing, Michigan, USA;

    Nordic Center for Earth Evolution and Institute of Biology, University of Southern Denmark, Odense M, Denmark;

    Department of Zoology, Miami University, Oxford, Ohio;

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  • 正文语种 eng
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  • 关键词

    copper sulphate; lake; sediment; sulphur;

    机译：硫酸铜;湖;沉淀;硫;

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