黄土高原马栏林区顶极群落的种间关联分析

Analysis on the Inter-specific Association of the Climax Community in the Malan Forest Area on the Loess Plateau

在黄土高原子午岭马栏林区辽东栎群落中,设置30个10 m×10 m的样方,对所有调查的69种木本植物进行种间关联性分析。结果表明:处于演替顶极阶段的辽东栎群落总体关联性呈显著正关联,符合演替进程的特征。通过点相关系数、X^2检验、r检验分析,显示种对间的关联性比较弱,即大部分是非显著的,种对间关系松散。正负关联性和关联强度的分析表明,种对间还存在有一定的竞争关系,但是处于环境的容许范围内,即群落基本是稳定的。

In this study 30 plots of 10 m×10 m were delimited in the Quercus liaotungensis community to research the inter-specific association of 69 species of woody plants in the Malan forest area of Ziwuling Mountain on the Loess Plateau.The results show that the specific association of these species is significantly positive,which is a typical character of climax community.It is concluded that the inter-specific association is not significant or very incompact mostly based on the calculation of point correlation and the test of x2 and r.Moreover,the analysis of positive and negative association values and degrees reveals the slight interspecies competition.However,the negative relationship is reasonable according to the succession stage,that is,the relatively steady community could restrain the mild competition.