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首页> 外文学位 >The effects of bleached kraft mill effluent on aquatic macrophyte communities in a lake system on the northern shore of Lake Superior.
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The effects of bleached kraft mill effluent on aquatic macrophyte communities in a lake system on the northern shore of Lake Superior.

机译：漂白牛皮纸厂废水对苏必利尔湖北岸湖泊系统中水生植物群落的影响。

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摘要

This research focuses on assessing the major effects that bleached kraft mill effluent (BKME) has on aquatic macrophyte communities of inland lakes. Research included three areas, the first involved a survey of water and sediment quality and vegetation distribution, diversity and biomass in three lakes, within the Terrace Bay study area. A comparison of trophic parameters was made between the three lakes, which differ in their exposure to BKME.;The impacts of BKME on lake limnology, included a reduction in available light and dissolved oxygen. The water temperature, conductivity and alkalinity of exposed lakes were elevated while loading of receiving waters and sediments with organic and inorganic nutrients occured. The result is a reduction in total biomass and species diversity and changes in species composition, to favour emergent aquatic macrophytes over submersed and floating leaf species.;The effect of depth on the growth of aquatic macrophytes within a lake that forms part of the effluent stream from the pulp paper mill was investigated. All 8 major aquatic macrophyte species were able to survive transplanting and grow within the exposed lake water and sediment, when propagated in water levels above the average secchi depth of 12 cm.;An investigation was conducted of the levels of congeners of polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated dibenzofuran (PCDF) in the sediment and aquatic vegetation of the two lakes exposed to BKME. Both these organochlorine groups have historically been measured in BKME and widely reported as anthropogenic xenotoxins.;The levels of PCDD/PCDF were found to be elevated in all aquatic macrophytes with higher levels being found in submersed species than emergents.;The PCDD/PCDF homologue profiles were similar for the lake sediments and the aquatic vegetation, with total levels in the three lakes, reflecting the exposure history to BKME.
机译：这项研究的重点是评估漂白牛皮纸厂废水（BKME）对内陆湖泊水生植物群落的主要影响。研究包括三个领域，第一个领域是在梯田湾研究区内对三个湖泊的水和沉积物质量以及植被分布，多样性和生物量进行调查。比较了三个湖泊的营养参数，它们在BKME中的暴露程度有所不同。BKME对湖泊湖泊学的影响包括减少了可用光和溶解氧。裸露的湖泊的水温，电导率和碱度均升高，同时接收水和沉积物中的有机和无机养分含量增加。结果是总生物量和物种多样性的减少以及物种组成的变化，有利于新兴的水生植物而不是淹没的和漂浮的叶片种类。深度对形成污水流的湖泊中水生植物的生长的影响对纸浆厂的纸浆进行了调查。当8种主要水生植物物种在平均secchi深度超过12 cm的水位中繁殖时，它们都能在裸露的湖水和沉积物中存活并移栽并生长。对多氯联苯-p的同源物水平进行了调查暴露于BKME的两个湖泊的沉积物和水生植被中的二恶英（PCDD）和多氯二苯并呋喃（PCDF）。这两个有机氯基团历史上都在BKME中进行了测定，并被广泛报道为人为异种毒素。;发现所有水生植物中PCDD / PCDF的含量均升高，而浸没物种中PCDD / PCDF的含量高于新兴植物.PCDD / PCDF的同源物湖泊沉积物和水生植被的剖面相似，三个湖泊的总水平，反映了BKME的暴露历史。

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  • 作者

    Coote, Michael Frederick.;

  • 作者单位

    Lakehead University (Canada).;

  • 授予单位 Lakehead University (Canada).;
  • 学科 Biology Ecology.;Environmental Sciences.;Biology Limnology.
  • 学位 M.Sc.
  • 年度 1996
  • 页码 153 p.
  • 总页数 153
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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