中文摘要：

为揭示三江源地区近10年来生态系统植被净初级生产力（NPP）的演变规律,借助研究区域的气温、降水等气象数据及MODIS遥感数据,应用CASA模型估算了三江源生态系统2001—2010年间的NPP,分析了NPP的时空变化格局。结果表明：2001—2010年间三江源生态系统NPP呈现由西北向东南逐渐递增的趋势,10年平均NPP为169.02 g·m-2·a-1,变化范围为159.53~176.25 g·m-2·a-1;10年来三江源草地NPP呈减少趋势,减少速度为0.69 g·m-2·a-1,减幅为4.77%。研究结果可以为三江源地区生态资源的有效管理与合理利用提供理论依据。

英文摘要：

To reveal Spatio-temporal dynamic of net primary productivity in Three-River source during recently 10 years, based on MODIS-NDVI data, and meteorological data, spatiotemporal changes of the NPP of Three-River source was simulated using CASA model. The results showed that average annual NPP from 2001 to 2010 was 169.02 g·m-2·a-1in the study area, exhibiting decrease trend from southeast to northwest. During 2001 to 2010, temporal NPP showed a no significant increase of 0.69 g·m-2·a-1, ranging from 159.53 to 176.25 g·m-2·a-1. This study could provide a theoretical basis for the management and rational utilization of ecological resources in Three-Rivers source region.