关帝山八水沟天然植物群落时空梯度的数量分析

在ＤＣＡ排序的基础上，应用排序轴分类法对山西关帝山八水沟景观的天然植物群落进行了数量分类，共划分出７类，效果较好．多元线性回归结果表明ＤＣＡ排序轴与环境因子密切相关．方差分析与多重比较结果表明，结合ＤＣＡ第２与３排序轴的二维排序图反映了群落的时空变异，其中第２排序轴反映了群落在坡向与坡度方面的空间梯度，第３排序轴反映了群落的森林演替、灌丛发育以及各类群落的草本层发育的时间梯度

QUANTITATIVE ANALYSIS TO THE GRADIENTS OF SPACE AND TIME OF NATURAL PLANT COMMUNITIES IN BASHUIGOU OF THE GUANDI MOUNTAIN

Based on Detrended Correspondence Analysis (DCA) ordination, the natural plant communities in Bashuigou landscape of the Guandi Mountain, Shanxi province are divided into 7 types with the method of Ordination Axes Clustering (OAC). It is concluded that the relation between the axes of DCA ordination and environment factors is clearly illustrated by Multiple Linear Regression. The result from the Analysis of Variance and Multiple Comparison shows that the two dimensional plot of the second and third axis obviously expresses the gradients of space and time in the communities. The second axis represents the space gradients of the communities in aspect and slope, but the third axis shows the time gradients of the communities related to forest succession, development of shrub and herbceous layer.