大兴安岭典型林区主要植物点格局分布研究

以大兴安岭山区一块典型林样地内的几种主要植物为研究对象,采用网格法分别在不同生境条件下设立研究样方,并测量相关数据,运用Ripley函数进行点格局分析,研究几种主要植物种的种群结构、空间关联性、空间分布格局及其影响因素等,以期为对寒温带森林植物进行保护和为森林经营管理提供理论基础。分析结果表明:整体上样地内中龄树个体数最多,占绝对优势,小树和老树在样地内各有分布且二者在量上的区别不明显;几个主要植物种在样地内均呈聚集分布,其中白桦和赤杨在样地内的聚集分布较为明显;样地内植物的分布与空间尺度的相关性较明显,部分植物种在小尺度上呈随机分布状态,但是随着尺度的增大植物种趋于聚集分布。

Study on Point Pattern of Main Plants in Typical Forest Region of Greater Higgnan Mountains

Taking several main plants in typical woodland of Greater Higgnan Mountains area as study object.The research quadrat was established and related datas were measured by using grid method in different habitats.Point pattern analysis was carried out to study the population structure,spatial correlation,spatial distribution pattern and the influence factors by Ripley function,so as to provide theoretical basis for plant protection and forest management in cold temperature zone.The results showed that:the number of mature trees individuals was the most on the whole,which had absolute advantages,young trees and old trees both distributed in the plots and the differences in the volume between them were not obvious.Several major plant species within the plots showed aggregated distribution,among these,the aggregated distributions of birch and alder in the sample were obvious.The correlation between distribution of plants and spatial scale in the plots was obvious,the distribution of some plant species in the small scale was random,but with the scale increasing,the accumulation trend of plant species became clear.