The Analysis And Evaluation On Land Ecosystem Services Value Of Guangzhou

Ecosystem service includes the necessary eco-products and ecological functions ensuring the life quality. The land is the carrier of variety of terrestrial ecosystems,doing research on ecosystem service changed under land use changes can be provide more useful information and choose proper policy of land use for the sustainable development of economic for policy makers; For mankind to promote regional eco-environmental protection and sustainable development of economic society have an important meaning.This paper based on the present changes of land use and the theoretical study of ecosystem services, linked to the actual situation of land use and economic develop during from 1999 to 2008 in Guangzhou, modified the parameter, and calculated the unit ecosystem service value of different types land as the index of ecosystem services value of Guangzhou. The functions of Guangzhou ecosystem under land use changes are evaluated spatially and temporally. We also analyzed by correlation and sensitivity to reveal the relationship between the changes of ecosystem services value and the social economic impact factors quantitatively. Basing the study, we advance the goal and measure of land use structure regulate for sustainable development of ecosystem.The main results are as follows:(1) From the index of different kinds of land, wetland is the highest, the next is agro-ecosystem; forest-ecosystem has the highest service value on water conservation and climate condition, but its total service value is lower than the others; The negative service value of residential and industrial mines land is -1936Yuan/hm2.(2) The total characteristics of land use system and its ecosystem service value are as follows: the changes in structure of land use lead the decline of ecosystem service value. Although the area of forest and wetland is increasing, it can not make up the decline of plantation, it also can not prevent the decline of total ecosystem service value consequently.(3)The spatial characteristics of land ecosystem service value are with the increasing of distance from central country, the service value also increasing. From the proportion of different ecosystem services, Haizhu region and Panyu region have high ratio on wetland; the district of Conghua, Huadu, Zengcheng and Baiyun have high ratio on forest. The ratio on plantation is lower in every region commonly.(4) From the relationship between ecosystem service value and the social economic development, the changes of ecosystem services value in Guangzhou province had an obvious negative correlation but lack sensitivity with the total population amount, GDP and the urbanization level, which meant that socio-economic development had weak influence on the environment in short time. According to the theory of environmental Kuznets curve, we conclude that with the economic society developed to a stage when GDP reached 910000 million and the total population reached 10705 thousand. The ecosystem service value have been located in a turning point, the value of ecosystem service have increasing. Therefore, we must put the work of ecological resource protection and ecological surroundings instruction as a long and systemic project.Basing these studies, from the characters of different land ecological services and actual situation in Guangzhou, the policy and thought for sustainable development of region ecosystem service value about land use structure are advanced.