濒危植物元宝山冷杉种群生命表分析

Analysis of the Life Table of Endangered Population Abies yuanbaoshanensis

摘要:

应用相邻格子法对元宝山冷杉种群进行野外调查,编制种群的静态生命表;根据试验结果编制幼苗期动态生命表。结果表明:元宝山冷杉种群结构存在明显的周期性和波动,出现多个死亡高峰,个体胸径超过18 cm后,期望寿命陡降,存活曲线趋于Deevey-Ⅲ型；一年生幼苗死亡率高达48%。

Abstract:

A bies yuambaoshanensis is an endangered species endemic to Guangxi in a limited area with less than 900 individuals， and is listed in the Plant Red Data Book of China． Field data were obtained from five 20 m × 30 m plots in Yuanbaoshan Nature Reserve by using tally with contiguous grid quadrat method for time-specific life table，and data from cultured seedlings in nursery, for dynamic life table An obvious periodic fluctuation in size structure of the population was showm． Expecting life ofindividuals larger than 18 cm DBH lowered obviously The survival curve of the population appeared to be a type of Deevey-Ⅲ．The mortality of one-year-old seedlings reached 48％.