新疆喀纳斯旅游区森林群落数量分类与排序

Numerical Classification and Ordination of Forest Communities in Kanas Tourist District,Xinjiang

采用双向指示种分析法(TWINSPAN)和除趋势对应分析(DCA)对新疆喀纳斯旅游区森林群落进行了数量分类和排序。结果表明:①采用TWINSPAN等级分类方法,将森林群落划分为9个类型;②TWINSPAN和DCA相结合应用能较好地反映出各森林群落之间以及森林群落与环境之间的关系;③DCA排序第一轴从左到右,湿度在逐渐增大,第二轴从下到上,气温逐渐降低,沿对角线方向,海拔逐渐升高。影响喀纳斯旅游区森林群落类型和植物种分布格局的主要环境因子是海拔梯度、水分和热量。

The numerical classification and ordination of forest community in Kanas tourist district, Xinjiang were studied using two-way indicator species analysis（TWINSPAN）and detrended correspondence analysis（DCA）. The results indicated： （1）The forest communities were classified into 9 types by the method of TWINSPAN; （2）The relationship among the forest communities and the relationship between the forest communities and the environment can be explained clearly by TWINSPAN and DCA; （3）The humidity was gradually increasing on the first axis of DCA from left to right, and the temperature was gradually reducing on the second axis from bottom to top. The altitude was gradually increasing along the diagonal direction. All these results show that the main factors restricting types of forest communities and distribution of the plant species were altitude, humidity and temperature in this district.