摘要
运用主分量分析(PCA)排序法对北京怀柔山区的暖温带灌丛群落进行了群系和群丛两个等级上的间接排序,降维效果较好.前三维占有信息量可达70%左右.灌丛的排序直观地反映了各样方之间的生态学距离,以及群落的连续性和间断性,并间接地反映了灌丛各类型的分布格局与其所处生境中坡向和水肥因子密切相关.主分量排序对灌丛样方具有一定的辅助分类作用,特别是对群丛的辅助分类效果更为明显.通过主分量分析,确定了对前三个主分量影响作用最大的种类.研究表明了主分量分析排序方法在灌丛研究中有良好的适用性.
In this paper, the deciduous broad-leaved scruds in Beijing Huairou mountainous area were studied using the method of principal component analysis ( PCA ) ordination The results showed that the distribution pattern of the scrub types were correlative with slope gradient and soil fertility and moisture It was proved that the PCA method was applicable to the study of the scrubs.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1991年第4期479-486,共8页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
植被
生态学
灌丛
群落
排序
haiurou mountainous area
scrub
sequencing
