摘要
运用相邻格子法,对雷公山秃杉种群进行生态学调查,采用空间代替时间的方法,编制秃杉种群的生命表。结果表明:秃杉种群结构存在波动性,成年阶段的个体较丰富,种群趋于DeeveyⅡ型;秃杉种群死亡率和消失率曲线变化趋势基本一致,均出现2个高峰,一个出现在第6龄级阶段,另一个出现在第12龄级阶段;秃杉种群的生存率单调下降,累计死亡率单调上升,生存率下降趋势前期高于后期,累计死亡率则相反;生存函数曲线表明,秃杉具有中期稳定和后期衰退的特点。
An ecological investigation was made on the natural Taiwania flousiana population in Leigong Mountain of Guizhou Province by using checkerboard frame method, and the life table of the population was established by the method of spatial series substituting for time series. There was a fluctuation in the structure of T. flousiana population. The individuals at adult stage were abundant, and the survival curve of the population trended to the type of Deevey Ⅱ. The mortality rate curve and the disappearance rate curve in the lifespan had the similar variation trend, with the peaks in 6th and 12th age class periods. The survival rate of the population decreased monotonically, whereas the cumulative mortality rate was in adverse. Four survival functional curves showed that T. flousiana population grew stably in middle age period but declined in old age period.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第7期1234-1238,共5页
Chinese Journal of Ecology
基金
中央民族大学"985工程"项目(CUN985-3-3)
国家科技支撑计划资助项目(2007BAC03A08-5)
关键词
种群生命表
存活曲线
种群数量动态
秃杉
life table
survival curve
population quantitative dynamics
Taiwania flousiana
