鄂西三峡库区森林资源动态变化分析与评价

为了科学地进行鄂西三峡库区森林资源生态效益的监测、合理评价及健康经营，对鄂西三峡库区森林资源面积、蓄积量、组成结构等进行了动态分析与评价。研究表明：20世纪60年代中期至80年代中期，该区域林业用地面积和蓄积均呈下降趋势；其后，由于实施一系列林业生态保护与可持续发展工程保护和发展森林资源，鄂西三峡库区森林面积、蓄积量和覆盖率有很大的提高，林地面积年均增长率为1.12%，防护林、经济林、特用林面积年均增长率分别为3.87%、10%、8.40%，用材林面积净减率为1.43%，林种结构逐步趋向合理，为三峡库区生态环境安全的构建发挥了积极的作用。

Analysis and evaluation on dynamic changes in the forest resources at the Three Gorges reservoir region in western Hubei

In order to monitor the ecology benefit and properly evaluate,and to manage the forest resources at the Three Gorges reservoir region in western Hubei,we conducted dynamic analysis on acreage,volumes and compositions of the forest resources in this area using statistical,compution and graphical analytical tools.The results showed that the forest acreage and stand volume decreased rapidly from the mid-1960s to mid-1980s.Since then,the Hubei provincial government and the local forestry bureau have exerted gre...