格氏栲种群生态学研究 V.格氏栲种群空间格局及其动态的研究

A Study on the Population Ecology in Castanopsis Kawakamii

本文运用５种典型聚集度指标考察测定３块不同生境的格氏栲种群空间格局类型以及分析其格局形成原因；同时，进一步探讨不同发育阶段格局动态规律及趋势．结果表明：格氏栲＋木荷＋蚊母树样地、格氏栲＋木荷＋马尾松样地成树阶段的格局呈随机，格氏栲＋马尾松＋米槠样地则呈聚集；３块样地幼苗阶段均呈聚集型分布，随着时间推移逐步扩散，不同生境扩散程度不同．

This paper presents the spatial distribution pattern of Castanopasis kawakamii population using aggregate indices(C、I δ、C A、M *) and the method of Iwao's(M *-M) regression,which are used for analying the causes of evolved pattern in the different habitats of three quadrats Meantime,the pattern dynamic and trendy rules of Castanopasis kawakamii are described in the different tree class The results of measurement indicate that the spatial patterns of the tree class of the population are of random type in quadart of Castanopsis kawakamii+Schima superba+Distylium racemosam、Castanopsis kawakamii+Schima superba+Masson's pine、and that of quadrat of Castanopsis kawakamii+Masson's pine+Castanopsis carlessii [WT5 BZ]is the clump type On the seelding, the spatial pattens in three quadrats are of clump type,which diffuse gradually with time and the degree of diffusion is related to the different habitats