芦芽山植物群落的多样性研究

Vegetation diversity of Luya Mountains

采用丰富度指数、物种多样性指数和均匀度指数对山西芦芽山植物群落的多样性进行了研究 ,并用相关分析研究了多样性指数间的关系 ,结果表明 :1 )随海拔升高物种均匀度指数逐渐增大 ,而丰富度指数和物种多样性指数逐渐减小 ;2 )各植被类型的物种多样性指数排列依次为 :落叶阔叶林 >温性针阔叶混交林 >温性针叶林 >寒温性针叶林 >落叶阔叶灌丛 >草甸 >灌草丛 ;3)多样性指数的DCA二维排序图很好地反映了各多样性指数间的关系 ;4)丰富度指数之间、物种多样性指数之间和均匀度指数之间存在极显著的相关性 ,同时对 1 2种多样性指数进行比较后发现 :R0 、N1 、N2 、E4和E5 优于其他指数。

Three richness indices, four species diversity indices and five evenness indices were used to analyze vegetation in Luya Mountains, Shanxi. In addition, relationships among these indices were studied by correlation analysis. The results indicated that: 1) the evenness indices increased with the increase of elevation, while the richness indices and species diversity indices showed the opposite trend; 2) the species diversity indices order of the vegetation type was as follows: deciduous broad_leaf forest>coniferous and broad_leaf forest>warm coniferous forest>cool temperate coniferous forest>deciduous broad_leaf shrub>subalpine shrub and grassland>herb_shrub; 3) the relationship among the 12 diversity indices were well reflected by the two_dimensional ordination diagram of DCA; 4) there were very significant correlation among richness indices, among species diversity indices and among evenness indices. All richness indices, species diversity indices and evenness indices were compared with each other, in which R 0、N 1、N 2、E 4 and E 5 were superior to the others.