太行山南端野皂荚群落物种多样性

Study on the Species Diversity of Gleditsia heterophylla Communities in the South Tip of Taihang Mountains,Shanxi

采用双向指示种分析法,将太行山南端野皂荚群落分为9个群丛。用丰富度指数、多样性指数和均匀度指数对野皂荚群落的物种多样性进行了研究,并用方差分析研究了各群落之间多样性指数的差异程度。结果表明:(1)组成野皂荚群落的维管植物有58种,隶属于23科50属。(2)在立地平缓、土层较厚的生境中,野皂荚群落具有较高的多样性指数;在干扰强烈的生境中,野皂荚群落的多样性指数偏低。(3)野皂荚群落的物种丰富度主要受草本层的影响,但不同层次的物种对群落物种多样性的贡献是不等价的。(4)由于野皂荚群落在太行山南端分布范围的局限性、生境的同质性和群落的相对稳定性,9个群丛各多样性指数间方差分析结果差异皆不显著。

40 quadrats of Gleditsia heterophylla communities were recorded in the south tip of Taihang Mountains, and those quadrats were classified into 9 associations by Twoway Indicator Species Analysis （TWINSPAN）. The species diversity of G. heterophylla communities was studied by using species richness indices, evenness indices and species diversity indices, respectively. In addition, the differences among these indices for all communities were studied by analysis of variance. The results indicated that ： （ 1 ） There were 58 species classified in to 50 genera and 23 families. （2） The G. heterophylla communities had higher diversity index in the habitats with gentle slope or with thick soil, however, G. heterophylla communities＇ s diversity index were lower in the highly disturbed habitats. （3） The species richness of G. heterophylla communities was mainly correlated With the herhaceous layer. However, the contributions of species at different layers to species diversity of community were not equivalent. （4） There were not significant differences among the diversity index of 9 Associations by ANOVA, because the limitation of those communities distribution,the homogeneity of their habitat and the relative stability of those communities.