两种珍稀植物群落物种多度分布的核方法研究

STUDIES ON KERNEL DENSITY ESTIMATION OF SPECIES ABUNDANCE DISTRIBUTION IN TWO COMMUNITIES OF RARE AND ENDANGERED PLANTS

摘要:

首次提出物种多度分布的非参数核密度估计方法，介绍了此方法的构造和主要性质。珍稀濒危植物观光木群落和长苞铁杉群落的乔木层、灌木层、所有木本植物物种多度分布实例拟合结果表明，核方法能很好地描述群落物种多度分布。非参数核估计方法是群落物种多度分布模拟的一种有效方法，它丰富了物种多度分布拟合方法，为珍稀濒危植物的管理与保护提供了理论参考。

Abstract:

The kernel density estimation method of species abundance distribution was used to simulate the species abundance distribution of two communities which were dominated respectively by rare species Tsoongiodendron odorum Chun and by vulnerable species Tsuga longibracteata Cheng. The results show that the species abundance distribution in tree and shrub layers and all woody plants of the two forests all can well be described by using nonparametric kernel method based on the sample data without assuming the species abundance distribution．The nonparamefic kernel density estimation is suggested to be a useful method for species abundance distribution simulation．