ABUNDANCE OF TREES AND GRASSES IN A WOODLAND SAVANNA IN RELATION TO ENVIRONMENTAL-FACTORS

被引：17

作者：

BENSHAHAR, R

机构：

[1] Department of Ecology, Oxford, OX1 3PS, South Parks Road

[2] Chobe Research, Kasane

来源：

JOURNAL OF VEGETATION SCIENCE | 1991年 / 2卷 / 03期

关键词：

CORRESPONDENCE ANALYSIS; DRY MATTER YIELD; ECOLOGICAL GRADIENT; SOIL FACTOR; SOUTHERN AFRICA;

D O I：

10.2307/3235926

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The relationships of plant species associations and underlying environmental factors in a woodland savanna in South Africa were investigated. 40 plots were included with 25 tree and 17 grass species dominating the arboreal and ground cover. Correspondence Analysis described the relationships between soil moisture retention, soil nutrients and the abundance of trees and grasses. Dry matter indices represented the accumulated effects of rainfall, fire and grazing of the herbaceous layer. Variations in the abundance of plants corresponded to well-defined gradients of soil nutrients. The distribution of grass and tree species along the ordination axes indicated that soils with high water retention capacity and high nutrient contents provided a suitable substrate for many of the tree species sampled. However, grass species abundance was high in plots with porous soils and poor nutrient availability.

引用

页码：345 / 350

页数：6

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