Ecological Character Changes and Sustainability Management of Wetland in the Sanjiang Plain

The paper presents all kinds of ecological character changes of wetland in the Sanjiang Plain, including change in wetland area, changes in water condition and water quality, unsustainable exploitation of wetland products, introduction of alien species, and the reasons of ecological changes are analysed. Then a strategy about Sustainability management of wetland ecosystem in the Sanjiang Plain is suggested. Finally the paper proposes three countermeasures of sustainability management. That is to say, from ecological indexes, mitigating, restoring and maitaining the function and process of wetland ecosystem; from social indexes, solving the problems between development and conservation of wetland; from economical indexes, dealing with the relationship between industry, agriculture and wetland.