森林生物多样性评价模型的改进

针对2002年的评价模型中的不足,提出了新的改进后的森林生物多样性变化的评价模型,并在我国第六次森林资源清查(1999～2003)资料的基础上,对1973～2003年我国森林生物多样性的变化进行了补充评价。评价结果表明:我国森林生物多样性的压力越来越大,压力指数由1973年的100,上升到2003年的199.10,上升了1.99倍;森林物种多样性总体的下降趋势已有一定幅度的改变,森林物种多样性指数增加了31.12%。森林生态系统多样性和森林生物多样性先逐渐上升,尔后又下降,第六次森林资源清查时又有所恢复,并分别上升了4.67个百分点和17.90个百分点。

Improvement on Evaluation Model of Forest Biodiversity

This paper has improved on evaluation models of forest biodiversity designed in 2002 by author himself which have not considered the weights and the positive and negative influences in different induces. After betterment models, the author renewed evaluation on forest biodiversity change from 1973 to 2003 based on the latest sixth survey of forest resources in China (1999-2003). The evaluation results indicated that from 1973 to 2003, the pressure of forest biodiversity is becoming more and more, the index ...