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Assessment of ecosystem health during the past 40 years for Lake Taihu in the Yangtze River Delta, China

机译：长江三角洲太湖近40年生态系统健康状况评价

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摘要

An assessment of the ecosystem health of Lake Taihu in eastern China from 1960 to 2005 was conducted using separate and aggregated chemical and biological indicators. The chemical oxygen demand, the total nitrogen, total inorganic nitrogen and total phosphorus concentrations, and the molar ratio of TN to TP (N/P) have all significantly increased (P 0.05) since 1980. The trophic state index increased from 35.0 in 1960 to 60.0 in 1990, confirming that Lake Taihu changed from being oligotrophic to being eutrophic. These changes in water quality have led to corresponding changes in species composition and in the densities and biomasses of many aquatic species. Algal blooms have occurred frequently since the late 1980s, leading to the dominance of small zooplankton and benthic invertebrates. About 41 fish, 65 zooplankton and 16 macrophyte species were estimated to have disappeared from the lake since the late 1980s. Buffer capacity increased for phytoplankton and zooplankton but decreased for zoobenthos. These results suggest that the Lake Taihu ecosystem was in better health in 1960, and has deteriorated since 1980.
机译：使用单独的和综合的化学和生物指标对中国东部太湖在1960年至2005年的生态系统健康状况进行了评估。自1980年以来，化学需氧量，总氮，总无机氮和总磷浓度以及TN与TP的摩尔比（N / P）均显着增加（P <0.05）。营养状态指数从35.0上升至2006年。 1960年达到1990年的> 60.0，证实了太湖由贫营养变为富营养。水质的这些变化已导致物种组成以及许多水生物种的密度和生物量发生相应变化。自1980年代后期以来，藻华频繁发生，导致小型浮游动物和底栖无脊椎动物占主导地位。自1980年代后期以来，据估计湖中已消失了约41种鱼类，65种浮游动物和16种大型植物。浮游植物和浮游动物的缓冲能力增加，但浮游动物的缓冲能力下降。这些结果表明，太湖生态系统在1960年处于健康状态，并且自1980年以来一直在恶化。

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  • 来源
    《Limnology》 |2011年第1期|p.47-53|共7页
  • 作者

    Baohua Guan; Shuqing An; Binhe Gu;

  • 作者单位

    State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, People’s Republic of China;

    School of Life Science, Nanjing University, Nanjing, 210093, People’s Republic of China;

    Guangdong Ocean University, Zhanjiang, People’s Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Pollution; Eutrophication; Health assessment; Lake Taihu; Biodiversity;

    机译：污染;富营养化;健康评估;太湖;生物多样性;

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