福建三明东牙溪流域南方红豆杉自然种群结构与动态研究

The Structure and Dynamics of Natural Population of Taxus chinensis var. Mairei in the Dongyaxi Basin of Sanming,Fujian

以福建三明东牙溪流域南方红豆杉为对象,研究了南方红豆自然种群结构,编制了种群静态生命表,分析了存活曲线、死亡率曲线和寿命期望曲线,并运用时间序列模型预测种群数量动态。结果表明:南方红豆杉种群幼苗幼树较多,达72.24%,只有17.90%的幼苗能长成小树,个体数到第Ⅳ级时达到最低;个体平均寿命期望在第Ⅳ~Ⅶ级间最大,种群结构稳定;维持保护好现有种群,东牙溪流域南方红豆杉种群依然有恢复壮大潜能。

Based on Taxus chinensis var. Mairei in the Dongyaxi Basin of Sanming,Fujian. The natural population structure of the T. chinensis var. Mairei was studied. The static life table of the population was compiled,the survival curve,the mortality curve and the life expectancy curve were analyzed,the time series model was used to predict the population dynamics. The results showed,that there were more seedlings and saplings in the T. chinensis var. Mairei population,reading 72.24%,only 17.90% of the seedlings could grow into small trees,and the number of individuals reached the lowest when they reached the size class Ⅳ;the average life expectancy of individuals reached the maximum in the size class Ⅳ to the size class Ⅶ,the population structure is stable;maintaining and protecting the existing population,the population of the T. chinensis var.Mairei in the Dongyaxi Basin still has the potential to recover.