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首页> 外文期刊>Limnology >Response of planktonic communities to calcium hydroxide addition in a hardwater eutrophic lake: results from a mesocosm experiment
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Response of planktonic communities to calcium hydroxide addition in a hardwater eutrophic lake: results from a mesocosm experiment

机译：硬水富营养化湖泊中浮游生物群落对氢氧化钙添加的响应：中观实验的结果

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摘要

The main focus of this study was to investigate the effects of lime treatment with Ca(OH)2 on a hypereutrophic hardwater lake (Lake Alserio, Northern Italy), focusing on its impact on plankton communities. We performed a mesocosm experiment using two large enclosures, one for treatment and one control, in the lake. The addition of Ca(OH)2 proved to be effective in reducing phosphorus concentration, but the effect was limited in time. Redissolution of the precipitating calcium carbonate as it came into contact with the deep water determined a phosphorus increase about 2 weeks after the liming. The liming had a strong impact on the plankton assemblage, as was demonstrated by the sharp decrease in phytoplankton and zooplankton biomass and density, and 1 month after the treatment we observed a different taxonomic composition inside the enclosure from that of the lake. The result of the experiment showed that liming with Ca(OH)2 can be regarded as a suitable treatment for accelerating recovery of the lake. Multiple treatments will be necessary to improve the trophic level over a longer period.
机译：这项研究的主要重点是研究Ca（OH）2 石灰处理对富营养性硬水湖（意大利北部的阿尔塞里奥湖）的影响，重点是其对浮游生物群落的影响。我们使用湖中的两个大型围栏进行了中观试验，其中一个围栏用于治疗，一个进行控制。事实证明，添加Ca（OH）2 可以有效降低磷浓度，但效果有限。沉淀的碳酸钙与深水接触后重新溶解，这确定了在石灰添加后约2周磷的增加。浮游生物对浮游生物的组合有很大的影响，浮游植物和浮游生物的生物量和密度的急剧下降证明了这一点，并且在处理1个月后，我们观察到了围堰内部与湖泊的生物分类组成不同。实验结果表明，Ca（OH）2 的加入对促进湖泊的恢复具有重要意义。在更长的时期内，将需要进行多种处理以提高营养水平。

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  • 来源
    《Limnology》 |2007年第2期|121-130|共10页
  • 作者

    Barbara Leoni; Giuseppe Morabito; Michela Rogora; Davide Pollastro; Rosario Mosello; Silvia Arisci; Elena Forasacco; Letizia Garibaldi;

  • 作者单位

    Dipartimento di Scienze dell’Ambiente e del Territorio Università degli Studi di Milano Bicocca Piazza della Scienza 1 20126 Milano Italy;

    CNR Istituto per lo Studio degli Ecosistemi Verbania Pallanza Italy;

    CNR Istituto per lo Studio degli Ecosistemi Verbania Pallanza Italy;

    CNR Istituto per lo Studio degli Ecosistemi Verbania Pallanza Italy;

    CNR Istituto per lo Studio degli Ecosistemi Verbania Pallanza Italy;

    CNR Istituto per lo Studio degli Ecosistemi Verbania Pallanza Italy;

    Dipartimento di Scienze dell’Ambiente e del Territorio Università degli Studi di Milano Bicocca Piazza della Scienza 1 20126 Milano Italy;

    Dipartimento di Scienze dell’Ambiente e del Territorio Università degli Studi di Milano Bicocca Piazza della Scienza 1 20126 Milano Italy;

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  • 正文语种 eng
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  • 关键词

    Eutrophication; Restoration; Liming Ca(OH)2; Phytoplankton; Zooplankton;

    机译：富营养化;恢复;石灰Ca（OH）2;浮游植物;浮游动物;

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