摘要
根据云南富源县光皮桦种群的调查材料,以种群生命表及生存分析理论为基础,通过"空间代时间"方法编制了其静态生命表,并绘制了光皮桦种群的存活曲线,并用4个生存函数对其进行了生存分析。结果表明,富源光皮桦种群处于中、幼龄林阶段,种群存活曲线属Deevey-Ⅲ型,年龄结构呈增长型。死亡率出现两个高峰,分别是由环境胁迫和人为砍伐引起的。种群生存分析表明,富源光皮桦种群的累计死亡率单调增加,生存率单调下降,中树阶段以后种群的累计死亡率达到97.6%,生存率仅为2.4%。种群发育过程总体表现为前期增长、中期稳定、后期衰退。
A static life table of Betula luminifera population was worked out by space-time substitution method in accordance with the data of B. luminifera population in Fuyuan County of Yunnan Province based on the life table of population and the theory of survival analysis. The curve of survival rate was constructed, and the survival situation was estimated by four survival functions. Result shows that B. luminifera population in Fuyuan County is at young and middle-aged stage, and its survival curve can be described by Deevey-Ⅲ. The population takes on an increasing tendency in age structure and has two distinct peaks of mortality due to the severe environmental damage and human disturbance without restraint. The population mortality rate is increasing all along, while the survival rate is decreasing all the time. The cumulative mortality rates of the population will exceed 97.6% and the survival rate will decrease to 2.4% after the stage of middle age. Generally, the population grows up dramatically at early age, and then goes into a stable state at middle age, and then followed by a declined state at old age.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2008年第9期19-20,23,共3页
Journal of Northeast Forestry University
基金
国家"十一五"科技支撑计划项目(编号:2006BAD03A10-4)
关键词
光皮桦
年龄结构
生命表
存活曲线
生存分析
Betula luminifera population
Age structure
Life table
Survival curve
Survival analysis
