中文摘要：

于Landsat TM／80LI（2000年、2005年、2010年和2015年）4期遥感影像，应用人工目视解译和监督分类等遥感技术方法，揭示西宁市城市生态用地的空间结构变化，评估其生态系统服务价值。结果表明：2000—2015年间生态用地面积减少了15．2％，建设用地增加了113％；其中，建设用地和林地面积一直处于上升趋势，农田面积一直处于下降趋势，草地和水域面积在小幅度内波动，裸地面积在2005-2010年是上升趋势，从2010年开始迅速下降。15年间西宁市区生态用地的变化导致生态系统服务价值也发生了很大的变化，2000-2015年，西宁市区生态系统服务总价值降低了7．5％，其中农田所提供的生态系统服务价值降低最大，降低了56．3％。城市生态用地结构的变化导致生态系统服务价值的变化，而城市生态用地的变化主要受经济的发展、人口的增加以及政府出台政策的影响。

英文摘要：

Based on four -phase remote sensing images （2000, 2005, 2010 and 2015） of Landsat TM/8OLI, using the remote sensing techniques as visual interpretation and supervised classification, this paper revealed the e- volution of landscape spatial structure of Xining and assessed changes of the value of ecosystem service. The results show that： During 2000 to 2015, area of ecological land has decreased by 15.2%, area of construction has land increased by 113%. During the past 15 years, Area of construction land and forest land have been increasing, ar- ea of farm land has been decreasing, area of grassland and water area didn＇t change much, area of bare land had increased during 2005 -2010, and decreased since 2010. The change of landscape spatial structure of Xining leads to great change of the value of ecosystem services. During 2000 to 2015, the value of ecosystem services in Xining has reduced 7.5 %. The value of ecosystem services provided by farm land has reduced 56.3 %. The change of urban ecological land influences the value of ecosystem services, and the change of urban ecological land influ- enced by economy, population and politics.