Assessment And Spatioteporal Difference Of Ecosystem Services Value Of Ecological Land In Wuhai

Ecological land can provide various important ecosystems services as regulating climate in a small region,conserving water and soil resources, providing a different type of landscape pattern. So ecological land is an important component of urban Social-Economic-Natural Complex Ecosystem. Based on GIS, this paper estimates the changing ecosystem service value after ecological land use change of Wuhai according to per unit Chinese land area ecosystem service value. We also study on composition differences and dynamic process of Wuhai ecosystem service value change in21years from temporal and spatial difference. The results show as follows:(1) Ecological land account for a proportion89.75%、83.32%、72.24%of all Wuhai land use in the year of1990、2000、2010, showing an decline trends.We sort the components of land use from largest to smallest.It is grass land, unused land, forest land, wet land,water.The other four land use were declined,while unused land was increased, from1990to2010.(2) From1990to2010, Wuhai ecosystem service value declined from12.46hundred million yuan to8.58hundred million yuan, decreased about3.88hundred million yuan.The loss of grass land ecosystem service value accounts51%for ecosystem service value. The loss of grass land ecosystem service makes a great contribution to Wuhai ecosystem service loss.We studied on the structure of Wuhai ecological land ecosystem service value between1990and2010, finding that ecosystem service value of all land use showed a decline trend.(3) We analyze ecological land eco-economic harmony index (EEH), found that EEH is between-0.5and0.showing that eco-economic harmony is in a condition of low-conflict.The result shows that eco-economic harmony of Wuhai is bad.The reason is that the development of economy makes a negative influence on environment.(4) From1990to2010, the change of ecosystem service value of Wuhai shows different trend, in which ecosystem service value of Hainan District and Haibowan District show a decline trend, decreased about1.57hundred million and1.6hundred million. The ratio is1.40%and2.60%. Ecosystem service value of Wuda District increased about0.1hundred million.The rations is0.26%. The most significant change is Haibowan District, in which the loss of Haibowan District account50.49%for all loses of Wuhai ecosystem service value.