摘要
根据北京雾灵山自然保护区1hm^2天然次生林样地调查结果，采用点格局分析方法，对群落内的主要种群在不同尺度下的空间分布格局及其相互关系进行了研究。结果表明：1）雾灵山天然次生林单种格局在较大尺度范围内都呈显著的集群分布，个别种群在尺度r〈3m和r〉48m时，呈随机分布；2）主要种群分布格局在0～50m尺度范围内，均达到了最大聚集强度，不同种群出现最大聚集强度和最大聚集规模的空间尺度差异较大，聚集强度大小顺序为蒙椴〉黑桦〉山杨〉白桦，单种格局的最大聚集规模顺序为山杨〉蒙椴〉黑桦〉白桦；3）树种之间存在着种间关联，负关联种对比率较大，树种间竞争激烈，群落组成和结构不稳定，处于植被演替的初期向演替中期过渡的阶段。
Based on the inventory of a natural secondary forest plot covering 1 hm^2 in Wuling Mountain nature reserve in Beijing, the method of point pattern analysis was employed to study the spatial distribution patterns and interspecific relationships of main populations in community under different scales. The results showed that： 1 ） single population distribution pattern presented distinct cluster mode under bigger scale extent in Wuling Mountain and very few ones presented stochastic mode under the scale of less than 3m and exceeding 48 m. 2） The distribution patterns of main populations attained maximal congregated intensity. The differences of spatial scales of maximal congregated intensity and maximal congregated size in different populations were distinct, and the descending order of congregated intensity was Tilia mongolica, Betula davurica, Populus davidiana and Betula platyphylla, while the descending order of congregated size of single population was Populus davidiana , Tilia mongolica , Betula davurica and Betula platyphylla . 3） interspecific relationships was visible among populations, and the population pairs of negative correlation accounted for a majority of ratio which resulted in furious interspecific competition and unstable composition and structure of community, and its vegetation succession stage was interim from initial to medium.
出处
《中国水土保持科学》
CSCD
2008年第3期59-64,共6页
Science of Soil and Water Conservation
基金
北京市科委重大项目“北京山区森林健康经营关键技术研究与示范”(D0706001000091)
国家“十一五”科技支撑计划课题“防护林体系空间配置与结构优化技术研究”(2006BAD03A02)
关键词
天然次生林
种群格局
种间关联性
点格局分析
雾灵山
natural secondary forest
population patterns
interspecific relationships
point pattern analysis
Wuling Mountain
