POPULATION-STRUCTURE AND DYNAMICS IN SUILLUS-BOVINUS AS INDICATED BY SPATIAL-DISTRIBUTION OF FUNGAL CLONES

被引:124
作者
DAHLBERG, A
STENLID, J
机构
[1] Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, S-750 07
关键词
clonal size; somatic incompatibility; spreading strategy; Suillus bovinus;
D O I
10.1111/j.1469-8137.1990.tb00475.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The spatial distribution of clones in the ectomycorrhizal fungus Suillus bovinus (L. ex Fr.) O. Kuntze was studied from somatic incompatibility pairings of isolates in four Scots pine (Pinus sylvestris L.) stands with different forest history. A pattern of increasing clonal size, decreasing clonal number, and decreasing fruiting per unit area, was found with increased forest age and relatively little disturbance. Establishment by spores was important on disturbed sites, while mycelial spread increased in importance with decreased disturbance. The number of clones was found to be 800 ha−1 in younger forest stands and decreased to between 25–130 ha−1 in mature stands. At the same time the diameter of the area occupied by a single clone increased from 1–3 m to 30 m. Implications of the observations are discussed in terms of ecological strategies and population dynamics. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
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页码:487 / 493
页数:7
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