The Research On Assessment Of Wetland Ecosystem Services Value In Datong Lake

Wetland ecosystem is a unique ecosystem on the earth, is the important human living environment, and is one of the most rich biological diversity of ecological landscape in the nature. It has giant environmental function and benefits, called "kidney of the earth". However, in the process of human production and life, people only pay great attention to short-term economic benefit, neglect ecological value, leaded to the wetland’s ecological environment seriously destroyed. So only making currency evaluation for wetland ecosystem and its benefits to human survival and development made in the process of ecology, as to the service function of environment-wetland ecosystem, can let the human have more intuitive understanding of the importance of wetland, so as to improve the protection consciousness of human for wetland.This paper take Datong Lake Wetland in Yiyang City as the research object, filtered the evaluation index of ecological service function by using frequency statistics, Delphi method, establish assessment index system of lakes wetland functional ecosystem services, the ecological services of Datong Lake wetland were evaluated by using emergy analysis in 2007 and 2012, wetland ecosystem services dynamic changes were analyzed. According to the present situation and dynamic change of ecological service function of Datong lake wetland, put forward several suitable measures for Datong wetland ecosystem. The main research results are as follows. the main results were as follows.(1) Retain 12 indexes as the final evaluation index system, such as water regulation and storage, water quality, carbon sequestration. They were classified as six categories, namely:water conservation function, carbon fixation and oxygen, climate regulation function, the function to protect the environment, biodiversity protection and cultural functions.(2) The ecological services of Datong lake value 2.04×1021 sej, worth 1.87×109 yuan in total in 2007; value 1.78×1021 sej, worth 1.60×109 yuan in total in 2012.(3) Compared with 2007, the total ecosystem services value of Datong Lake wetland reduced by 14.44% in 2012. Among them, each ecosystem service functions are increased or decreased in varying degrees. The main reasons for these changes are: the reduced of wetland park forest area; the rise of lake bottom; Reduce of biological species; The influence of artificial factors; raise popularity of Datong lake wetland.(4) Protection measures include:actively promote wetland conservation; establish wetland nature reserve or wetland park which can protect the wetland wildlife resources effectively; protect Datong Lake wetland ecological environment through legislation; establish a unified coordination mechanism, strengthen the Datong Lake Wetland Management.