中文摘要：

应用Greig—Smith的等级方差分析方法，结合野外样带调查法，在山西文峪河流域的庞泉沟自然保护区设置了5条典型样带，对华北落叶松林三个群落类型的优势树种立木空间分布格局进行了数量化分析。研究结果表明，等级方差分析法可较方便地分析林木的空间分布格局，确定格局规模尺度，定性地比较分析聚集强度；样带宽度影响分析结果，实际研究中需进行必要的试验，以便确定适当的宽度；研究地区的三个华北落叶松林类型在16m和64m两个尺度上，都表现为明显的聚集分布格局，三者的差异反映了局部小尺度干扰和资源环境异质性分布的影响控制作用；研究地区三个类型的华北落叶松林中，在64m斑块尺度上的聚集强度，灌木落叶松林〉云杉落叶松林〉苔草落叶松林；在16m尺度上的聚集强度云杉落叶松林〉灌木落叶松林〉苔草落叶松林。

英文摘要：

Spatial distribution patterns of individual trees were mathematically analyzed in three community types of North-China larch （principis-rupprechtii） natural stands in Pangquangou natural reserve, Wenyuhe upper-river in Shanxi. Hierarchical analysis of variance was used with species abandons data collected by sample belts method to explore the general presentations of individual tree distribution. The results supposed that Hierarchical analysis of variance could be conveniently used to indicate the clustering scale or size and strength; Results from hierarchical analysis of variance was obviously affected by sample belt width, therefore, some pre-experiment are often needed to determine the reasonable belt width in a research proposal. This research also indicated that the distribution pat- tern of individual trees in all of the three types of larch stands showed clustering pattern at scales of 16m and 64m with different strength modified by heterogeneity of micro-environment and micro-scale disturbances. The clustering strengths at 64m scale of three types of communities ranked as Bush-larch forest, Spruce-larch forest and Carex-larch forest, and ranked as Spruce-larch forest, Bush-larch forest and Carex-larch forest at 16m the scale. No any direct evidences were proposed in this paper to explore the formation mechanics of spatial pattern, and more reasonable corresponding researches are needed in future in environmental resource heterogeneity spatial pattern.