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首页> 外文期刊>Environmental Pollution >Has long-term metal exposure induced changes in life history traits and genetic diversity of the enchytraeid worm Cognettia sphagnetorum (Vejd.)?
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Has long-term metal exposure induced changes in life history traits and genetic diversity of the enchytraeid worm Cognettia sphagnetorum (Vejd.)?

机译:长期的金属暴露是否引起了肠轮虫蠕虫Cognettia sphagnetorum(Vejd。)的生活史特征和遗传多样性的改变?

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摘要

We studied whether long-term metal exposure has affected life history traits, population growth patterns and genetic diversity of the asexual enchytraeid worm Cognettia sphagnetorum (Vejd.). Enchytraeids from metal contaminated and uncontaminated forest soil were compared by growing them individually in the laboratory and by following their population development in patchily Cu contaminated microcosms. Genetic differences between the two native populations were studied using allozyme electrophoresis. Individuals from the contaminated site had slower growth rate and they produced fewer fragments of larger size when compared to individuals from the uncontaminated site. In patchily Cu contaminated microcosms, C. sphagnetorum from the contaminated site had a slower population growth rate. Most alleles were shared by the two native populations, but there was greater diversity and more unique genotypes in the population living in the uncontaminated site. Overall, long-term exposure to metals has induced only slight changes in life history properties and clonal diversity of C. sphagnetorum.
机译:我们研究了长期的金属暴露是否影响了无性肠回肠蠕虫Cognettia sphagnetorum(Vejd。)的生活史特征,种群增长模式和遗传多样性。通过对金属污染和未污染的森林土壤中的肠衣动物进行单独比较,并在实验室中逐一生长它们,并跟踪其在铜污染的微观世界中的种群发展情况。使用同工酶电泳研究了两个原生种群之间的遗传差异。与来自未污染地点的个体相比,来自受污染地点的个体的生长速度较慢,并且它们产生的较大尺寸的碎片更少。在部分被铜污染的缩影中,来自被污染地点的鞘脂梭菌的种群生长速度较慢。大多数等位基因由两个本地人群共享,但是生活在未受污染地点的人群具有更大的多样性和更多独特的基因型。总体而言,长期暴露于金属中仅引起了生活史特性和食管梭菌的克隆多样性的微小变化。

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