一种森林群落演替树种顶级适应值的统计方法

本发明公开了一种森林群落演替树种顶级适应值的统计方法,包括如下步骤:(1)、基于不同区域森林群落的特点设置若干样地并对样地分别进行调查;(2)、将上述区域所有调查样地合并为一个整体,以每个调查样地为单位划分不同尺度大小的取样样方面积;在不同取样样方面积尺度下,利用2×2列联表法和X2统计量检测各树种种间关联性;再经各树种的种间关联性分析,确定种间关系的最适样方面积;(3)、在最适样方面积尺度下,基于各树种幼树与先锋种和顶级种的相似性来统计森林群落演替树种的顶级适应值。本发明可客观、定量的获知各树种顶级适应值,相较于现有方法,更具操作性和科学性。

The present invention discloses a statistical method for calculating the climax adaptation value of tree species during forest community succession. The specific steps are as follows: (1) Establish multiple sample plots according to the characteristics of forest communities in different regions, and conduct separate investigations on each sample plot; (2) Combine all surveyed sample plots in the above-mentioned regions into a whole, divide sampling quadrat areas of varying scales with each surveyed sample plot as the basic unit, use the 2×2 contingency table method and χ² statistic to detect the interspecific associations of each tree species under different sampling quadrat area scales, and then determine the optimal sampling quadrat area for interspecific relationships through the interspecific association analysis of each tree species; (3) At the scale of the optimal sampling quadrat area, calculate the climax adaptation value of tree species during forest community succession based on the similarity between the saplings of each tree species and both pioneer and climax species. This invention enables objective and quantitative acquisition of the climax adaptation value of each tree species, and has better operability and scientific rigor compared with existing methods.