宝天曼落叶阔叶林种间联结性研究

基于 2× 2联列表 ,应用X2 统计量度量、共同出现百分率和联结系数等公式测定了河南宝天曼保护区海拔 1 1 50～ 1 50 0m范围落叶阔叶林的 2 0种主要乔木和 2 6种主要灌木种群的种间联结性。结果表明 :在该区森林植被研究中 ,以X2 检验为基础 ,结合共同出现百分率PC和联结系数AC来测定植物种群的联结性 ,效果较好。种间正联结性越强 ,其生态位重叠值越大 ,种间负联结性越强 ,其生态位重叠值越小。根据种间联结特征 ,将 2 0种主要乔木划分为 4个生态种组

INTERSPECIFIC ASSOCIATION OF PLANT POPULATIONS IN DECIDUOUS BROAD LEAVED FOREST IN BAO TIANMAN

Based on the 2×2 contingency table, the interspecific associations of tree and shrub species in the deciduous broad-leaved forest at the elevation from 1150 m to 1500 m in Bao Tianman, Henan province were studied by different indices. The results show that X2 test, together with percentage co-occurrence (PC) and association coefficient (AC) was effective way to measure the association. The more intense the positive association was, the larger the value of niche overlap was; the more intense the negative association was, the smaller the value of niche overlap was. In the light of the interspecific association, tree species can be divided into four ecogroups of species.