浙江仙居俞坑森林群落优势种群结构与分布格局研究

ON DOMINANT POPULATION STRUCTURE AND DISTRIBUTION PATTERN OF YUKENG FOREST COMMUNITY IN XIANJU OF ZHEJIANG

以浙江仙居俞坑森林群落为研究对象 ,用“空间序列代替时间变化”的方法 ,对该群落优势种群的结构和动态进行了分析 ,结果是 :各优势种群中常绿阔叶树种的大小级分布图的形状基本相似 ,种群存活曲线均表现为极显著的线性关系 ,种群的年龄结构为稳定型。落叶树种拟赤杨的年龄结构为衰退型。甜槠、青冈栎、红楠种群的分布格局均呈集群分布 ,木荷、虎皮楠种群的分布格局多为随机分布 ,拟赤杨呈随机分布或均匀分布。甜槠种群的幼苗、幼树的分布格局均呈集群分布 ,中树、大树呈随机分布或均匀分布。

The dominant population structure and dynamics of the Yukeng forest community in Xianju County of Zhejiang Province were analyzed by using the method of spatial sere substituting for time sere,which comes to the following conclusion:The distribution diagram shapes of the evergreen broad leaved trees of different size among the dominant populations are basically similar.The populations survival cures are of sharp linear,and the age structure is stable.The age structure for deciduous trees Alniphyllum fortunei is declining.The distribution patterns of Castanopsis eyrei,Cyclobalanopsis glauca and Machilus thunbergii populations are of clump;the distribution patterns of Schima superba and Daphniphyllum oldhamii populations are mostly of poisson;the distribution pattern of Alniphyllum fortunei is of poisson or uniform.The distribution patterns of seedling and treelet of Castanpsis eyrei are of clump while the medium,big sized trees are of poisson or uniform.