Ecological degeneration of the Erhai Lake and prevention measures

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• 作者：Shengrui Wang ; Li Zhang ; Leyi Ni ; Haichao Zhao ; Lixin Jiao…
• 关键词：Erhai Lake ; Water ecosystem ; Anti ; degeneration ; Biological group ; Submerged vegetation ; Eutrophication
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：74
• 期：5
• 页码：3839-3847
• 全文大小：776 KB
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• 作者单位：Shengrui Wang (1) (2)
  Li Zhang (1) (2)
  Leyi Ni (3)
  Haichao Zhao (1) (2)
  Lixin Jiao (1) (2)
  Suwen Yang (1) (2)
  Longgen Guo (3)
  Jianzong Shen (4)
  
  1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
  2. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
  3. Donghu Experimental Station of Lake Ecosystem, Institute of Hydrobiology, CAS, Wuhan, 430072, China
  4. College of Fisheries, Huazhong Agriculture University, Wuhan, 430070, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

The water quality of Erhai Lake is good as a whole, but its decreasing trend is not optimistic; the water ecosystem of Erhai Lake has changed dramatically, showing an obvious degenerating trend. The main reasons for the ecosystem degeneration are as follows: inflow pollution load exceeding the water environmental capacity, not favorable water habitat for the propagation of submerged plants, and the weak management for the lake basin. To prevent the degeneration of Erhai ecosystem, two key problems should be solved: one is to reduce the inflow pollution load to prevent the increase of nitrogen and phosphorus concentrations in the overlying water; and the other is to implement the ecosystem regulation, namely improve the stability and biodiversity of Erhai ecosystem by habitat improvement, ecological restoration and ecological regulation. In terms of the preventive measures against the Erhai ecosystem degeneration, the pollution source control in combination with ecosystem regulation should be taken as the focus. Pollution source control, habitat improvement, ecological restoration, ecological regulation and watershed management should be emphasized simultaneously. To be specific, the key tasks for preventing Erhai ecosystem degeneration include five points namely, the reduction of pollution loading into lake, adjustment of ecological fishery, restoration of submerged vegetation, watershed integrated management, and emergency treatment of water blooms. Keywords Erhai Lake Water ecosystem Anti-degeneration Biological group Submerged vegetation Eutrophication