摘要
采用4块100 m×100 m的天然林样地材料,分别利用Clark&Evans聚集指数法和角尺度法分析了不同起测径下林木个体的空间分布格局。结果表明:林木空间分布格局的判定与起测径的大小有关,起测径不同分布类型也会有变化,并且这种变化没有规律性,因此,在分析林木空间分布格局时应采用相同的起测径。
By employing the aggregate index R formulated by Clark & Evans and uniform angle index W, the data from four 100 m×100 m natural forest plots were analyzed with varying minimum measured diameter (MMD) to identify tree spatial distribution patterns. It showed that tree spatial distribution patterns were related to MMD, spatial distribution patterns varying irregularly with MMD. Therefore, identical MMD class should be employed in the analysis of tree spatial distribution patterns.
出处
《林业科学研究》
CSCD
北大核心
2007年第3期334-337,共4页
Forest Research
基金
国家林业局948项目"林分计算机模拟技术引进"
关键词
天然林
起测径
林木空间分布格局
Clark&Evans指数
角尺度
natural forest
minimum measured diameter(MMD)
tree spatial distribution patterns
Clark&Evans index
uniform angle index