基于VEGETATION数据的区域生态系统质量评价之二--生产能力指数评价

Vegetation Data Based Regional Biogicalquality Accessment——The Assessment of Ecosystem Productivity Index

区域生态系统生产能力指数是评价其生态功能的重要指标之一。文章构建了区域生态系统生产能力指数评价模型，并对中国1998～2004年间区域生态系统生产能力进行评价，发现中国各区域生态系统的生产能力在时空发布上差异巨大，在空间上呈现从西北往东南逐级变好的趋势，西北最差。在时间分异上，区域生态系统生产能力呈现明显的季节性发布，尤以北方地区最为明显：

The ecosystem productivity is one of the ecosystem functions. The ecosystem productivity index model is designed in this paper. Vegetation data is used to access China regional productivity index from 1998 to 2004. It is found that the ecosystem productivity is obviously distinct in different area. The regional ecosystem decreases its productivity from the Southeast to the Northwest of China. The zone ecosystem productivity is the abundantest in Southeast China. The regional ecosystem fluctuates its productivity with seasons changing especially in north China.