SPATIAL PATTERNS OF TREES IN NATURAL FORESTS OF EAST-CENTRAL-EUROPE

被引：127

作者：

SZWAGRZYK, J

CZERWCZAK, M

机构：

[1] Department of Forest Botany and Nature Conservation, Agricultural University, Cracow, 31-425

来源：

JOURNAL OF VEGETATION SCIENCE | 1993年 / 4卷 / 04期

关键词：

COMPETITION; DISTURBANCE; FOREST STRUCTURE; NATURAL REGENERATION; SITE HETEROGENEITY; TEMPERATE FOREST;

D O I：

10.2307/3236074

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The analysis of spatial patterns is one of the ways to estimate the role of competition among trees in forest dynamics. Three hypotheses concerning distribution patterns in old-growth stands were tested: (1) fine-scale spatial patterns of trees are regular; (2) patterns do not differ significantly from a random distribution, and (3) spatial patterns at larger scales are clumped because of site heterogeneity. Old-growth forest stands in Poland and the Czech Republic were analysed with a modified Ripley K function, using distribution maps of tree stems. Fine-scale spatial patterns (with distances among trees not exceeding 15 m) were usually intermediate between random and regular. Trends towards a regular distribution occurred more often among dead than among live individuals. No significant relationships between tree species were found at smaller scales; however, at larger scales (distances from 15 -25 m) negative associations between some species were found. This reflects site heterogeneity rather than any direct influence of one tree species upon another.

引用

页码：469 / 476

页数：8

共 37 条

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