天童国家森林公园树种多样性的加性分配

根据物种丰富度、Shannon指数和Simpson指数建立的物种多样性分配方法，提出分异度系数，对天童森林公园内不同森林类型的树种多样性进行了分析.结果表明，基于物种丰富度指数，总体的多样性只有小部分归功于样方内多样性，而多样性大多分配在样方间、亚群丛间或群丛间，例如在木荷-栲树群丛中，样方内只贡献了20.3%的物种丰富度.而在Shannon指数和Simpson指数中，多样性大多分配在样方内.这种差异主要是由于后两种指数不仅考虑了物种的存在与否，也考虑了其在样方内的多度.同时比较分析了加性分配与传统方法的结果.

Additive partitioning of tree species diversity in Tiantong National Forest Park

In recent decade,the additive partitioning of species diversity has been revived,and used to describe a variety of diversity patterns.This paper analyzed the additive partitioning of tree species diversity in Tiantong National Forest Park,based on species richness,Shannon index and Simpson index.For species richness,small part was partitioned within plots,and most diversity was partitioned among plots or(sub-) associations.For example,in Schimeto-Castanopsietum fargesii association,only 20.3% of the species richness was assigned within plots.However,for Shannon index and Simpson index,most diversity was partitioned within plots,because these indices gave consideration to both species number and its abundance in each plot.The results of additive partitioning were also compared to those of traditional method in this paper.