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首页> 外文期刊>Limnology >Grazing on toxic and non-toxic Microcystis aeruginosa PCC7820 by Unio douglasiae and Corbicula fluminea
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Grazing on toxic and non-toxic Microcystis aeruginosa PCC7820 by Unio douglasiae and Corbicula fluminea

机译：姬松茸和flu草对有毒和无毒铜绿微囊藻PCC7820的放牧

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摘要

To explore the potential grazing effects of mussels on Microcystis aeruginosa, a common bloom-forming phytoplankton, Unio douglasiae and Corbicula fluminea were fed with Scenedesmus obliquus, toxic and non-toxic strains of Microcystis aeruginosa as single food and as mixtures in the laboratory. When fed with single foods, U. douglasiae has similar clearance rates on the three algae populations, while C. fluminea has significantly lower clearance rate on toxic M. aeruginosa than those on the other two algae populations. When fed with mixture foods, both the mussels show significantly higher clearance rates than on single foods. The clearance rates of U. douglasiae on the different food mixtures are not significantly different, and C. fluminea has a significantly lower clearance rate on the toxic food mixtures than that on non-toxic food mixtures. Although the relative lower clearance rates of C. fluminea on toxic food, we may still deduce that both the mussels can exert grazing pressure on phytoplankton. The deduction is supported by the composition of the excretion products. The excretion products (faeces and pseudofaeces) of both mussels contained mainly S. obliquus. In both mixed-food treatments, the ratios of S. obliquus to M. aeruginosa in the excrete products are significantly higher than those in the foods. Therefore, it can be concluded that both mussels prefer M. aeruginosa to S. obliquus, and can cause grazing pressure on M. aeruginosa.
机译：为了研究贻贝对铜绿微囊藻的潜在放牧作用，在实验室中，将常见的形成水华的浮游植物，浮游植物Unio douglasiae和长尾Cor藻Corbicula fluminea分别以斜角藻，有毒和无毒的铜绿微囊藻作为单一食品和混合物食用。当以单一食物喂养时，对三个藻类种群来说，道格拉斯藻的清除率相近，而对铜绿假单胞菌对有毒铜绿菌的清除率却明显低于其他两个藻类。当饲喂混合食品时，两种贻贝的清除率均显着高于单一食品。在不同食物混合物中的道格拉斯氏菌的清除率没有显着差异，并且C. fluminea在有毒食物混合物上的清除率显着低于无毒食物混合物上的清除率。尽管在有毒食物中氟虫的清除率相对较低，但我们仍可以推断出两种贻贝都可以对浮游植物施加放牧压力。推论由排泄产物的组成来支持。两种贻贝的排泄产物（粪便和假粪便）都主要含有斜生链球菌。在两种混合食品处理中，排泄产品中斜纹葡萄球菌与铜绿假单胞菌的比率均显着高于食品中的比率。因此，可以得出结论，两种贻贝都比铜绿假单胞菌更喜欢铜绿假单胞菌，并且可以对铜绿假单胞菌造成放牧压力。

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  • 来源
    《Limnology》 |2009年第1期|1-5|共5页
  • 作者

    Ying Liu; Ping Xie; Xiao-Ping Wu;

  • 作者单位

    Donghu Lake Ecosystem Experimental Station Institute of Hydrobiology Chinese Academy of Sciences 430072 Wuhan Hubei People’s Republic of China;

    Donghu Lake Ecosystem Experimental Station Institute of Hydrobiology Chinese Academy of Sciences 430072 Wuhan Hubei People’s Republic of China;

    College of Life Science Nanchang University 330047 Nanchang Jiangxi People’s Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microcystis aeruginosa PCC7820; Scenedesmus obliquus; Unio douglasiae; Corbicula fluminea; Excrete products;

    机译：铜绿微囊藻PCC7820;斜柏目;花旗草;大戟;排泄物;

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