2005~2015年挠力河流域生态系统生产能力时空变化浅析

The Spatail-temporal Changes of Ecosystem Productivity in Naoli River Basin During 2005~2015

基于2010~2015年MODIS-NDVI的月数据、土地利用数据,分析挠力河流域生态系统生产能力的时空变化特征。结果表明,2005~2015年,挠力河流域生产能力指数EPI的平均值分别为62.11、58.13、66.91,标准差为12.78、13.86、13.99。总体表明,挠力河流域生态系统生产力水平从2005年到2010年呈下降趋势,减小了6.41%,2010年到2015年呈上升趋势,增加了15.10%。从生态系统类型的角度进行分析,2005~2015年,森林生态系统对整体区域的生产能力贡献最大,依次为农田生态系统、草地生态系统、城镇生态系统和湿地生态系统的生产能力最弱。

Based on the monthly MODIS-NDVI data from 2010 to2015,the change characteristics of ecosystem productivity in Naoli River Basin were analyzed according to different ecosystem types.The result shows that this region’s average value of EPI was 62.11,58.13,66.91,and the standard deviation was 12.78,13.86,13.99 during 2005 to 2015.In general,the ecosystem productivity of Naoli River Basin experienced a process of first decreasing 6.41%and then increasing 15.10%from 2005 to 2015.From the analysis of different ecosystem types in 2005,2010 and 2015,the productivity level of forest ecosystem was the highest,followed by farmland ecosystem and grassland ecosystem,and the productivity level of wetland ecosystem and urban ecosystem was the lowest.