土地利用变化对乌江源区生态系统服务价值的影响

Impacts of Land Use Change on Ecosystem Service Values in Source Region of Wujiang

基于2000年和2015年乌江源区土地利用数据,利用CLUE-S模型,预测了2030年乌江源区土地利用数据。并利用生态系统服务价值系数法,分析了2000—2030年乌江源区土地利用变化对生态系统服务价值的影响。结果表明:2000—2015年和2015—2030年,乌江源区生态系统服务总价值均呈增加趋势。耕地面积减少导致耕地生态系统服务价值和食物生产服务价值下降,林地面积大幅增加使得大部分生态系统服务功能价值增加。生态系统服务价值变化空间破碎化严重与土地利用变化空间破碎有关。生态修复工程驱动下大量耕地转为林地是乌江源区生态系统服务价值增加的主要因素。

Based on land use data for 2000 and 2015 in source region of Wujiang,land use map for 2030 has been projected with the help of the CLUE-S model.We analyzed the change of ecosystem service value resulting from land use change from 2000 to 2030 by using the method of ecosystem service value coefficients.The results showed that the total ecosystem service value increased from 2000 to 2015 and from 2015 to 2030,farmland ecosystem service value and food production service value presented the decreasing trend due to the decrease of farmland area.Most ecosystem service function values presented the increasing trend owning to the prominent increase of woodland area.There was the significant spatial fragmentation for ecosystem service value change which is related to spatial fragmentation for land use change.The implementation of ecological rehabilitation project resulted in the conversion of farmland to woodland,which led the increasing trend for ecosystem service value in source region of Wujiang.