瑞典河漫滩草甸植被的数量分类和排序

本文用目前各国学者广泛使用的一些数量分类和排序方法对瑞典河漫滩草甸样地资料进行了分类和排序。所用的方法包括多元等级聚合分类(TABORD程序)，多元等级分划分类(TWINSPAN程序)，PCA排序(ORDINA程序)，RA和DCA排序(DECORANA程序)。研究结果表明可以把28个样地分为6个群落类型，它们的分布格局是与土壤水分梯度密切相关的。此外本文还对数量分类和排序方法在植物群落学研究中的应用以及所用方法的比较进行了讨论。

NUMERICAL CLASSIFICATION AND ORDINATION OF FLOOD LAND MEADOW VEGETATION

In this paper,the vegetation of flood land meadows within a Swedish nature reserve was studied by using a number of popular numerical classification and ordination methods,which include a polythetic hierarchical agglomerative classification (TABORD program),a polythetic hieratchical divisive classification(TWINSPAN program),PCA ordination (ORDINA program),RA and DCA ordinations (DECORANA program). The results show that these 28 releves can be classified into six plant community types,which are distinguished along a soil-water gradient. In addition,the application of numerical classification and ordination in vegetation ecology and a comparison of these methods applied in this paper are discussed.