关键词: 洞庭湖区, 生态服务, 经济价值, 土地利用变化

Abstract: In order to quantitatively analyze and compare the change of ecosystem services caused by land use change, the economic value of ecosystem services in 17 administrative districts in Dongting Lake Area was estimated with the table of equivalent weight factor of economic value of ecosystem services of China, and the economic value of food production per hectare was supplied by cropland ecosystem and on the basis of Chinese resource and environment spatialtemporal database land use situation at the end of 1970's, 1980's and 1990's extracted by analyzing threeperiod TM data. During 20 years the change of the ecosystem services value was calculated and compared, and the area differentiation was measured by coefficient of variation. At last, the causes of the change were discussed. The result shows that the land use change is different among 17 administrative districts and the total value of ecosystem services was up to 93.4 billion yuan at the end of 1990's, but the larger coefficient of variance indicates that the difference among 17 administrative districts is obvious. On the whole, the ecosystem services value in East Dongting Lake is much larger than that in West Dongting Lake. In the past two decades the difference of the ecosystem services value among 17 administrative districts changed very largely. In all administrative districts the change in Huarong is the most, which was more than 200 million yuan, and the least was Jinshi which was 12 million yuan.

Key words: ecosystem services, Dongting Lake Area, economic value, land use change