辽东山区天然次生阔叶混交林空间结构的研究

用空间结构参数———角尺度、混交度和大小比数分析了辽东山区天然次生阔叶混交林空间结构。结果表明:辽东山区天然次生阔叶混交林林分处于相对稳定状态,整体上表现出群落处于较高演替阶段的属性特征。林分平均角尺度在0.479～0.524之间,属于随机分布或轻度的团状分布;平均混交度在0.699～0.828之间,为强度混交或极强度混交;胸径大小比数呈现出均衡分布的特征,整个林分树种的稳定性较高。

Spatial Structure of Natural Secondary Broad-leaved Mixed Forest in Eastern Mountainous Area of Liaoning Province

This paper used spatial parameters(uniform angle index,mingling and neighborhood comparison) to study the spatial structure of natural secondary broad-leaved mixed forest in eastern mountainous areas of Liaoning Province,China.The results showed that the natural secondary broad-leaved mixed forest in area was in a fairy stable period and the communities were in the higher successional stage.The mean values of uniform angle index ranged from 0.479 to 0.524,and the pattern of horizontal distribution was random or of slight cluster.The mean values of mingling ranged from 0.699 to 0.828,and the mingling intensity was intensive or most intensive.The distribution of the neighborhood comparison based on DBH was balanced,and the tree species was in a relatively stable state.