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近50年长江流域建坝与营养盐物质输送研究进展

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刘宁宁. 近50年长江流域建坝与营养盐物质输送研究进展[J]. 环境化学, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
引用本文: 刘宁宁. 近50年长江流域建坝与营养盐物质输送研究进展[J]. 环境化学, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
shu
LIU Ningning. Review on the nutrients transport in Yangtze River with responses to the damming in the drainage basin in the past 50 years[J]. Environmental Chemistry, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
Citation: LIU Ningning. Review on the nutrients transport in Yangtze River with responses to the damming in the drainage basin in the past 50 years[J]. Environmental Chemistry, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
shu

近50年长江流域建坝与营养盐物质输送研究进展

  • 1.

    河南教育学院, 郑州, 450046

  • 基金项目:

    河南省科技攻关重点项目（152102310093，152102310327）资助.

Review on the nutrients transport in Yangtze River with responses to the damming in the drainage basin in the past 50 years

  • 1.

    Henan Institute of Education, Zhengzhou, 450046, China

  • Fund Project: Supported by the Science and Technology Key Programme of Henan Province(152102310093,152102310327).

  • 摘要: 为深入总结长江营养盐输送规律，本文收集了近10年前人发表的大量文献和数据，重点探讨近50年流域大规模筑坝和人类活动加剧背景下，长江水沙与营养盐输送规律以及河口生态环境响应，并提出了今后研究的重点领域.结果表明，近半个世纪以来，由于人类活动频繁和流域建坝兴起，长江N、P输入过剩，而Si显著减少，导致河口和近海营养盐比例N∶P升高，Si∶N下降，造成部分水体出现P限制和Si限制，进而诱发河口水体藻类优势种由硅藻向有毒鞭毛藻转变，长江口和邻近海区底层水体出现厌氧现象.此外，三峡建坝对营养盐输送规律可能产生短期影响，但长期影响较为有限.最后，本文从流域资源利用和河口生态环境响应的角度，提出今后应重点关注三峡水库营养盐蓄积效应、河口近海营养盐扩散规律以及长江口生物种群和生态结构变化等问题.
    Abstract: To better understand the nutrients transport patterns in the Yangtze River,this paper collected the relevant data from published documents in the past decade,and stressed on the ecological responses in the Yangtze Estuary due to the large-scale damming and booming fertilizer use in the past 50 years. The results revealed that high inputs of N,P and impoundment of Si derived from the accelerating human activities led to increasing N:P and lowering Si:N,which might cause the occurrence of P-limitation and Si-limitation in the Yangtze Estuary. The consequences included the shifting from diatom to toxic dinoflagellates in the biomass structure,and observation of large areas of the hypoxia zone in the bottom water off the Yangtze Estuary and the adjacent East China Sea. Besides. Three-Gorges Dam would exert a short-term impact on the nutrients transport,but the influence seemed quite limited in the long run. Given the Three-Gorges Dam impoundment and ecological responses in the Yangtze Estuary,future attention should be focused on the nutrients detention by the "reservoir effect",dispersal patterns in the changing hydrological scenarios,and the variation of microbial population and biomass structure off the Yangtze Estuary and adjacent sea.
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出版历程
  • 收稿日期:  2016-10-23
  • 刊出日期:  2017-07-15
刘宁宁. 近50年长江流域建坝与营养盐物质输送研究进展[J]. 环境化学, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
引用本文: 刘宁宁. 近50年长江流域建坝与营养盐物质输送研究进展[J]. 环境化学, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
shu
LIU Ningning. Review on the nutrients transport in Yangtze River with responses to the damming in the drainage basin in the past 50 years[J]. Environmental Chemistry, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
Citation: LIU Ningning. Review on the nutrients transport in Yangtze River with responses to the damming in the drainage basin in the past 50 years[J]. Environmental Chemistry, 2017, 36(7): 1579-1587. doi: 10.7524/j.issn.0254-6108.2017.07.2016102301
shu

近50年长江流域建坝与营养盐物质输送研究进展

  • 1. 河南教育学院, 郑州, 450046
  • 收稿日期:  2016-10-23
基金项目:

河南省科技攻关重点项目（152102310093，152102310327）资助.

摘要: 为深入总结长江营养盐输送规律，本文收集了近10年前人发表的大量文献和数据，重点探讨近50年流域大规模筑坝和人类活动加剧背景下，长江水沙与营养盐输送规律以及河口生态环境响应，并提出了今后研究的重点领域.结果表明，近半个世纪以来，由于人类活动频繁和流域建坝兴起，长江N、P输入过剩，而Si显著减少，导致河口和近海营养盐比例N∶P升高，Si∶N下降，造成部分水体出现P限制和Si限制，进而诱发河口水体藻类优势种由硅藻向有毒鞭毛藻转变，长江口和邻近海区底层水体出现厌氧现象.此外，三峡建坝对营养盐输送规律可能产生短期影响，但长期影响较为有限.最后，本文从流域资源利用和河口生态环境响应的角度，提出今后应重点关注三峡水库营养盐蓄积效应、河口近海营养盐扩散规律以及长江口生物种群和生态结构变化等问题.

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