青海省海东地区土地利用变化及其生态服务价值响应

根据青海省海东地区2002～2008年土地利用变更数据，采用土地利用动态度模型和土地利用综合指数分析该地区近7年来土地利用变化情况，并参考谢高地等人建立的中国陆地生态系统单位面积生态服务价值当量表对该区域当量表进行适当调整，测算了土地利用变化所引起的生态服务价值变化情况。研究表明：（1）2002～2008年，各类型土地利用变化速度各不相同，其中以水利设施用地变化速度最快为12．24％，土地利用程度波动上升；（2）土地利用变化所引起的生态服务价值总体上呈逐步上升趋势，由2002年的82．01×10^8元增加至2008年的88．16×10^8元，增加了6．15×10^8元；（3）各种土地利用类型的生态系统服务价值的敏感性指数均小于1，表明生态系统服务价值对价值系数的变化缺乏弹性，研究结果可信。

RESEARCH ON THE CHANGE OF LAND USE AND ITS ECOSYETEM SERVICE VALUE IN HAIDONG REGION

According to the land use change datas of Haidong region between 2002 and 2008,and using the land use dynamic model and land use index,this paper analyzed the land use changes of Haidong region for nearly seven years.By appropriate adjusting the ecosystem services value unit area of Chinese terrestrial ecosystem proposed by XIE Gaodi,this paper has calculated the ecosystem service value changes which by the land use changes.The result showed that:(1)The land use changed at different speeds,the change rate of water conservancy facilities land use was 12.24%,it was the rapiddest,and the degree of land use was in a fluctuating ascending from 2002 to 2008;(2)The value of ecosystem services changes which was caused by land use changes presented an overall increasing trend,and it was increased from 8.201 billion yuan in 2002 to 8.816 billion yuan in 2008,615 million yuan was increased;(3)The sensitivity index was less than 1,indicating that the coefficient of sensitivity of ecosystem service was lack of flexibility,the results of research were reliable.