植物生态学报 ›› 1985, Vol. 9 ›› Issue (4): 266-273.

• 论文 • 上一篇    下一篇

广西常绿阔叶林的极点排序

王献溥,周玉丽,宋永昌   

  • 发布日期:1985-04-10
  • 通讯作者: 王献溥

The Polar Ordination of Evergreen Broadleaved Forests in Guangxi

Wang Xianpu, Zhou Yuli, Song Yongchang   

  • Published:1985-04-10
  • Contact: Wang Bosun

摘要: 极点排序法的最大特点是人为地选择座标轴。根据我们对四种不同选轴方法的对比,发现在排序结果上没有大的区别。这表明在选择端点样地时,只要剔除那些最无关的极端样地后,根据植被变异度来确定端点还是可行的。无论用哪一种选轴方法,为了避免端点样地与其它样地过于无关,凡是与其它样地相异性系数出现100者均不能选为端点样地。四种选轴方法的排序结果与聚类分析结果基本是相一致的,这说明极点排序法仍可作为研究样地相互关系以及与环境关系的一种辅助方法,对群落分类研究是有帮助的。

Abstract: 30 releves were treated by polar ordination procedure. Four methods for construction of axis were adopted. They were: criteria of Bray & Curtis, of Yong & Lu, of Swan & Dix, and of Cottam, Goff and Whittaker. No significant difference was shown. The ordination graph obtained with the criteria of Yong & Lu, and of Bray & Curtis was more coincident with cluster analysis results. It implied that, after excluding the very irrelevant releves the only need for the establishment of the terminal stands was the variation of vegetation, no additional requirement would be necessary. But owing to avoid the terminal stands are too unrelated to rest stands, we suggest that in case those stands with 100 dissimilarity index could not be selected them as terminal stands. Thanks of the results of polar ordination were basically coincident with the cluster analysis results, it was proven that the cluster analysis can better reflect the relation between stands. Therefore, these two procedures, cluster analysis and polar ordination, are complimentary.