东北过伐林灌木层物种多样性与林分因子的典型相关分析

研究林分特征尤其是经营上可以控制的因子对生物多样性的影响，将有助于制定合理的经营措施来维持和保护生物多样性，本文作者以我国东北过伐林区3种典型天然林类型为对象，采用典型相关分析方法，研究影响灌木层物种多样性的主要因子。结果表明：影响灌木层物种多样性的主要因子包括土壤含水率，树种多样性和林分密度；灌木层多样性组的变异被林分组第一典型变量解释的比例为68.32%,仍有31.68%的变异不能得到解释。

CANONICAL CORRELATION ANALYSIS BETWEEN SPECIES DIVERSITY IN SHRUB LAYER AND STAND VARIABLES IN OVER-LOGGED FORESTS IN NORTHEASTERN CHINA

It is useful for making management strategies and protecting biodiversity to study the effects of stand attributes on species diversity, especially controllable factors by forest management. Using canonical correlation analysis, this paper aims to find major stand variables affecting species diversity in shrub layer in 3 types of over logged forests in northeastern China, which include soil water content, tree species diversity and tree stems per hectare. Of these factors, soil water content and tree species diversity have positive correlationship with species diversity in shrub layer, but tree stems per hectare has negative. 68.32% of the variance of species diversity in shrub layer was explained by the first canonical variable of stand variables, but the rest was not interpreted yet. These conclusions can be used for the decision of sustainable forest management.Tab 8, Ref 12