Abstract: Based on the investigation data of Mongolian Linden plots in Beijing Wulingshan Nature Reserve, the method of point pattern analysis was employed to study the tree species composition of the community, the dominantpopulation, and the spatial distribution pattern and interspecific relationshipof the population in different development stages.The results show that:1)for the tree layer of Mongolian Linden, there are 9 populations, there is a great difference in population density, the proportions and the basal area of Mongolian Linden population take obvious advantages;2) The distribution pattern andthe space correlation are closely related to the spatial scale of the dominantpopulation of Mongolian Linden, in the research scale, both Mongolian Linden population and aspen population take significant aggregation distribution, birch population takes random distribution.The space correlation of the dominant population is mainly negative association, the interspecific competition is very fierce.3) The scale variation of the spatial pattern of individual is obvious, bigtree took random distribution in the whole space scale, medium tree and young tree take significant aggregation distribution in county and village scale(r<24m)and random distribution in a larger scale.The space correlation of the populations is mainly negative association in different developmental stages, when thespace scale is larger than the critical value, the space correlation among bigtree, medium tree and young tree becomes weak, but the negative associationbetween medium tree and young tree increases.

Key words: population pattern, point pattern analysis, space correlation, developmental stages