采用双向指示种分析法(TWINSPAN)对山西霍山植被群落(12个样地56个样方)进行分类,并利用物种丰富度指数、多样性指数和均匀度指数对不同演替阶段的群落物种多样性进行了比较分析。结果显示,用TWIN-SPAN法可将56个样方划分为10组,命名为10个群丛:山核桃+毛白杨-虎榛子-唐松草群丛(Ⅰ)、山核桃-虎榛子-白莲蒿群丛(Ⅱ)、车前+艾+乌头群丛(Ⅲ)、山核桃+油松-土庄绣线菊-细秆羊胡子草群丛(Ⅳ)、油松-绣线菊-细秆羊胡子草群丛(Ⅴ)、油松-沙棘-白茅群丛(Ⅵ)、辽东栎+山核桃-黄刺玫-细秆羊胡子草群丛(Ⅶ)、华北落叶松-鹅耳枥-蛇莓群丛(Ⅷ)、山梅花-石防风群丛(Ⅸ)和绣线菊-白茅群丛(Ⅹ)。10个群丛可划分为6个演替阶段:弃耕地先锋群落阶段(群丛Ⅲ)、草本群落阶段(群丛Ⅹ)、灌木群落阶段(群丛Ⅸ)、先锋乔木群落阶段(群丛Ⅰ和Ⅱ)、混交林过渡群落阶段(群丛Ⅳ、Ⅴ、Ⅵ和Ⅷ)和顶级群落阶段(群丛Ⅶ)。随着演替的进行,霍山植被的物种多样性指数、丰富度指数和均匀度指数都呈增加的趋势,并在演替的中后期(混交林过渡群落阶段)达到最大值;而在不同的演替阶段,乔木层、灌木层和草本层的物种多样性指数的变化趋势也不同。各物种多样性指数中,Margalef丰富度指数与Shannon-Wiener多样性指数间有极显著的相关性(P<0.01),其余的物种丰富度指数、多样性指数和均匀度指数间也有显著的相关性(P<0.05)。说明山西霍山植被演替序列完整,在植被演替过程中,物种的种类和个体数量以及群落结构的复杂程度明显增加。 

The classification of community (fifty-six quadrats belonging to twelve plots) of Huoshan Mountain vegetation in Shanxi Province was carried out by TWINSPAN, and the species diversity at different succession stages was also comparatively analyzed by using species diversity index, richness index and evenness index. The results show that using TWINSPAN, the fifty-sixquadrats can be divided into ten groups, those are named as ten associations: Assoc. Carya cathayensis+Populus tomentosa-Ostryopsis davidiana - Thalictrum aquilegifolium var. sibiricum (Ⅰ), Assoc. Carya cathayensis-Ostryopsis davidiana-Artemisia sacrorum (Ⅱ), Assoc. Plantago asiatica+Artemisia argyi+Aconitum carmichaeli(Ⅲ), Assoc. Carya cathayensis+Pinus tabulaeformis-Spiraea pubescens-Eriophorum gracile(Ⅳ),Assoc. Pinus tabulaeformis-Spiraea salicifolia-Eriophorum gracile(Ⅴ), Assoc.Pinus tabulaeformis-Hippophaerhamnoides-Imperatacylindrica(Ⅵ),Assoc.Quercus wutaishanica+Carya cathayensis-Rosaxanthina-Eriophorum gracile(Ⅶ), Assoc. Larix principis-rupprechtii-Carpinus turczaninowii-Duchesnea indica(Ⅷ), Assoc.Philadelphus incanus-Peucedanum terebinthaceum (Ⅸ) and Assoc. Spiraea salicifolia- Imperata cylindrica(Ⅹ). These ten associations can be classified into six succession stages, that is abandoned land pioneer community stage (Assoc.Ⅲ),  herb community stage  (Assoc.Ⅹ), shrub community stage(Assoc.Ⅸ), pioneer arbor community stage(Assoc.Ⅰ andⅡ), mixed  forest transitional community stage(Assoc. Ⅳ ,Ⅴ ,Ⅵ andⅧ) and climax community stage (Assoc.Ⅶ). Along with succession proceeding, all indexes of species diversity, richness and evenness appear rising trend, and reach to the maximum value at middle and late phases of succession (mixed forest transitional community stage).And the indexes of species diversity of tree layer, shrub layer and herb layer have a variant changing trend at different succession stages .There is an extremely significant correlation between Margalef's richness index and Shannon-Wiener's diversity index (P< 0.01), and the significant correlations also exist among other indexes of species diversity,  richness and evenness(P< 0.05). It is suggested that there is a full succession series of vegetation in Huoshan Mountain, and during the process of vegetation succession, the number of species and individual and complexity of community structure are on the increase obviously.