太白山雅美鹿蹄草和鹿蹄草种群分布格局

摘要

The spatial distribution pattern of Pyrola decorata and Pyrola calliantha in Taibai Mountain was studied by using four aggregate indices of diffusion coefficient (C),negative binomial parameter (K),mean crowding (M*) and patch index (PA,I) as well as uniformity method,the nearest neighbor method and Iwao' s equation.The results showed that the spatial distribution pattern of P.decorata and P.calliantha were aggregating distribution.Iwao's equation showed that the basic element for the distribution in both populations was an individual colony.The individuals in the P.decorata population attracted each other,but the ones in P.calliantha population excluded each other.%应用扩散系数(C)、负二项参数(K)、平均拥挤度(M*)、聚块性指数(PA.I)4种聚集度指标,均匀度法,最近邻体法和Iwao方程对太白山雅美鹿蹄草和鹿蹄草种群空间分布格局进行研究.结果表明:2种鹿蹄草种群的空间分布格局为聚集分布;Iwao方程表明,2种群分布的基本成分均是个体群,但雅美鹿蹄草种群个体间相互吸引,鹿蹄草种群个体间相互排斥.