Abstract: Using the 2×2 contigency table and different indices, the interspecific associations of main shrub populations in Alsophila spinulosa community in Yongding, Fujian were analyzed. The result of X2 test shows that the imterspecific association is not obviously correlative in most of the species-pair, except the minority species-pair. After the association coefficient (AC) and the percentage of co-ocurrence (PC)were calculated, there was closely the plsitive association among Syzygium buxifolium and Maesa japonica, Rosa sp. and Eurya nitida, Ardisia japonica and Maesa japonica, Cyclobalanopsis glauca and Ilex chinensis. It shows that there are similar in ecologcal characteristics and habitat among these four species-pairs

Key words: Alsophila spinulosa community

摘要： 采用X2检验、联结系数(AC)和种间共同出现百分率(PC)等指标,分析了福建省永定桫椤群落内主要灌木树种的种间联结性.结果表明:除少数种对外,绝大多数种群间的联结性不显著;在联结性显著的种对中,下述4个种对之间有较高的正联结性:赤楠-杜茎山、蔷薇属一种-细齿叶柃、沿海紫金牛-杜茎山、青冈-冬青.表明这4个种对间的生态习性和对环境的需求较一致.

关键词: 桫椤群落, 灌木种群, 种间联结