太岳山森林群落物种多样性

Species Diversity of the Forest Communities in Taiyue Mountain,Shanxi

根据 8个样地的调查资料 ,用丰富度指数、多样性指数和均匀度指数对山西太岳山 10个森林群落多样性进行研究 ,结果表明 :1)同一群落不同层次的物种多样性指数存在一定的波动范围 ;不同群落间 ,物种多样性指数也存在差异 ,这种差异与群落所处的演替阶段相关 ;当群落处于演替的顶级阶段时乔、灌、草 3个层次的物种多样性和均匀度指数多为乔木层 <灌木层 <草本层 ;演替先锋阶段和进展阶段多为乔木层 <灌木层 >草本层或乔木层>灌木层 <草本层。 2 )分布在不同海拔高度的森林群落的物种多样性呈连续性波动的变化 ,表现为随海拔高度的增加 ,物种多样性指数呈上升趋势。 3)群落物种多样性在空间上的差异不仅决定于物种丰富度指数 ,更与各物种间的均匀度指数密切相关 ;

According to data from 8 plots,the species diversity of 10 forest communities in Taiyue Mountain were studied by using richness indices, diversity indices and evenness indices. The results show:1) A fluctuation for species diversity indices exists between different layers within a same community; and discrepancies between communities have correlations with their succession stages. When the community is in climax stage, the species diversity and evenness indices of the community were the lowest for the tree layer,and followed the shrub layer and herb layer sequentially;when the community seral pioneer and progressive succession stages,indices for tree layer <shrub layer >rb layer,and the tree layer >rub layer <herb layer,respectively. 2) The species diversity of communities in Taiyue Mountain shows for successional variation along with its vertical distribution. It showed that the species diversity indices increase with the increase of elevation. 3) There are evident differences among the species diversities of forest communities in Taiyue Mountain, which are not only determined by species richness indices, but also have a closer relationship with the evenness indices of respective species and hence can influence their respective contributions to the overall species diversity of the . community