中国区域生态系统生产能力指数变化原因分析

The Force Analysis of Area Ecosystem Productivity Index Changing in China

决定中国区域生态系统生产能力指数的影响因子主要有两类:一是下垫面的影响,山区、丘陵的生产能力高于平原区,在具备生产能力的土地生态类型中,林地生产能力最高,耕地次之,草地最低;二是气候因子的影响,季风气候决定了我国生态系统生产能力的空间分布,呈现西北-东南逐级递增的趋势,造成这种空间分布的主要因素是季风气候造成的降水空间分布。同时,温度也在一定程度上影响了我国生态系统的生产能力,尤其是东部地区。降水对生态系统生产能力的影响强度较温度大。

In China, the ecosystem productivity is mainly determined by two factors. One is the top graphy, mountains and hilly areas have higher productivity than plain areas for less impact by human being. In the land cover types, forest land have the highest productivity, agricultural land takes the second place, and grass land takes the last. Another factor is climate. Monsoon climate controls the distribution of ecosystem productivity that is the ecosystem increases its productivity from the Southeast to the Northwest of China, just as precipitation controlled by the Monsoon climate. At the same time, temperature also has impact on productivity to some extent, especially in the east of China.