Research On Effect Of Landscape Change On The Eco-system Service Valuations In The Wetland Of Ebinur Lake

The Ebinur Lake is the largest salt lake in Xinjiang．It’s located in the west ofJunggar Basin，where the climate is arid and the land is low-lying．It has severalessential ecological functions: water conservation，sand fixation，climate regulation，maintenance of biological diversity，etc．It is of significant strategic meanings in theecological security of the economic belt on the northern slope of Tianshanmountains.This paper selected the Wetland Nature Reserve District of Ebinur Lakeas target research region，which has been being intensively disturbed by human beingactivities，the data source comes from the Landsat TM remote sensing images in1990，2001，2013，interpreting images by GIS，analyzing landscape dynamic degree，transfer probability，landscape pattern index in this region，and combining the resultsof previous studies，function service value of landscape ecological types of3periodsin the Wetland Reserve District and the loss of ecosystem function service valuewhich brought about by landscape changes was estimated by using the method ofecological economics，and puts forward some suggestions，provide a scientific basisfor the management and protection for wetland of Ebinur.Mainly the followingconclusions:(1)Among all the landscape types of study area，the area of marsh，grasslandhave decreased，which reduced by237.49km2and358.51km2respectively，whilecultivated land has increased by386.53km2，annual dynamic degree is16.15%;Water area had slightly increased，but which has little influence．During the21years，space transfers of each landscape types are quite complex．Cultivated land，marsh，woodland，grassland，all has a vast dynamic range．Due to the effect ofprecipitation of current year，water area possess indetermination．Marsh andgrassland which degenerated are almost transferred into farmland.(2)The variation of landscape index in study area shows that：NP decreasedfrom84054to79361，the patch connectivity is reinforced，and area increased，LSIreduced from121.23to106.24，CONTAG decreased from63.71to61.79，DIVISION reduced from0.5964to0.5853．During the21years，landscape tends tobe broken，thus its wetland ecological value will necessarily degrade.(3)After estimated，the ecological values in1990，2001，2011turned out to be89.68，103.76，74.95billion yuan respectively．During21years，the ecological valuereduced by14.73billion yuan，which decreased lot.