Study Of Ecosystem Service Values Changes Based On CLUE-S Models In Guangxi Karst Mountainous Area

With the rapid development of global economy in recent years, it has alreadymade some achievement. At the same time, ecological environment has paid a heavyprice. Global ecological destruction has become an indisputable fact. Land as thebasis for the existence of human beings has an inseparable relationship with ecology,and ecosystem service value is an important response to land use change. Land is notonly able to provide food and raw materials, but also can regulate climate, purifywater, maintain biodiversity, supply landscape appreciation and provide many otherecological service function.Based on the status of Guangxi land use data in2000,2005and GIS platforms,using CLUE-S model to predict land use change, combined with equivalent value perunit area of ecosystem services in China by Xie Gaodi et al, this paper calculated andamended the value of ecosystem services and the spatial distribution of ecosystemservice value table in Guangxi, revealed Guangxi karst mountainous area’secosystem service value temporal variation by comparing with those situations in1995,2000and2005.（1）CLUE-S compound model with Markov can effectively predict land usesituation，combined with ArcGIS platform studying ecosystem service value of thespatial distribution,and it is a very useful research tool. In the future, CLUE-S modelcan be used for ecosystem services value temporal evolution of the ecologicallyfragile area.（2）Forest land, grassland, farmland constitutes Guangxi karst mountainousmain types of land use structure, the area of the three categories of land accounts forabout99%of the total area, and it had occurred the more obvious changes in land usestructure in recent years. From1995to2000, arable land and forest area is keepincreasing. From2000to2005, arable land, grassland, unused land showed adecreasing trend, woodland, water area, construction land increased. This paperpredicted grassland and unused land would decreasing, and forest la nd constructionland and water area would increase. （3）Finally it was found that the main types constituting of land area the valueof ecosystem services is farmland, forest land, grassland; If the human impact ofchange between2001and2005is keeping, the value of ecosystem services inGuangxi Karst Mountainous Area basically stable in2015, reaching66.439billion(RMB); From the Perspective of Space，the high value area for value of ecosystemservices have a tendency to expand, low value area while still expanding, and themiddle value area will narrow, particularly in the Southwest, Northeast should be alertthat construction land expansion and radiation effect, thus the eco-environmentalsituation is still very grim.