ENVIRONMENTAL CORRELATES OF SPECIES DISTRIBUTIONS IN A SAXICOLOUS LICHEN COMMUNITY

被引：30

作者：

JOHN, E

DALE, MRT

机构：

[1] Department of Botany, University of Alberta, Edmonton, Alberta

来源：

JOURNAL OF VEGETATION SCIENCE | 1990年 / 1卷 / 03期

关键词：

Alberta; Canonical Correspondence Analysis; Environmental factor; Jasper National Park; Spatial distribution;

D O I：

10.2307/3235715

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Abstract. The importance of abiotic environmental factors in determining species distributions in a saxicolous lichen community at Jonas Rockslide, Jasper National Park, Alberta is assessed using Canonical Correspondence Analysis. This technique allows ordination of species on axes determined by measured environmental variables. The suitability of this technique for handling data which may not be normally distributed is confirmed by comparison with the results obtained using a non‐parametric correlation coefficient. The variables found to be most highly correlated with species distributions are altitude on the rockslide and inclination from horizontal of the rockface (slope). These variables are thought to determine temperature and water availability at the rock surface. Using the first two ordination axes, species can be divided into groups, based on shared responses to the measured environmental variables. 1990 IAVS ‐ the International Association of Vegetation Science

引用

页码：385 / 392

页数：8

共 20 条

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