中条山中段植物群落数量分类与排序研究

在群落样方调查基础上，采用双向指示种分析法（TWINSPAN）和除趋势对应分析（DCA）对中条山中段植物群落进行了数量分类和排序。TWINSPAN将53个样方分为14组，根据植被分类的原则划分为14个群丛，论述了各群丛的群落学特征。53个样方的DCA排序结果反映了植物群落类型与环境梯度之间的关系，表明影响群丛分布格局的主导生态因子为海拔高度、水分和热量。DCA排序将65个种分为5个种组，各种组在排序轴上的位置反映了种组成员的生态适应性及其在群落中的重要性和更新生态位。

Quantitative Classification and Ordination of Plant Communities in Midpiece of Zhongtiao Mountains

According to the data of field plots,the classification and ordination of plant community in Midpiece of Zhongtiao Mountains,Shanxi Province,were studied using two-way indicator species analysis(TWINSPAN) and detrended correspondence analysis(DCA).53 samples were divided into 14 groups by TWINSPAN.Based on the principle of vegetation classification,were classified into 14 associations and their community characteristics are described.The result of DCA ordination has reflected the relationship between plant community type and the environment gradient.The result shows that distribution pattern of the associations were mainly affected by the leading ecology factor of elevation,temperature and humidity.65 species are divided into 5 groups by DCA ordination,the seat of 5 groups on the ordination axle of DCA has reflected their ecology adaptability and importance and regeneration niche in the community.