摘要
对贵州秃杉(TaiwaniaflousianaGaussen)集中分布地———雷公山自然保护区,采用空间序列代替时间序列的方法,从种群的环境条件、大小级结构和静态生命表的生存分析等方面,研究该种群的动态特点。结论如下:⑴雷公山秃杉种群,在林下光线好,人为扰动小的环境条件下,幼苗储备量丰富,种群为迅速增长种群。群落郁闭时,幼年个体及成年个体的被压木死亡。⑵秃杉种群静态生命表的生存分析表明,在种群的生活史中,各径级的生存与死亡、死亡密度与危险率2种函数都存在前期波动大后期趋于比较稳定的特点。幼年阶段存在明显的自疏和他疏现象。⑶人为干扰和种群的生物学特性使得种群结构出现明显的断代现象,因此应加强自然保护。
The dynamic characters of environmental conditions, size structure and survival analysis of the static life table of Taiwania flousiana Gaussen population were studied by using spatial series of the time series analysis method in its extensive distribution area - Leigong Mountains Nature Reserve. The seedlings of the species were found to be abundant in the understorey with adequate illumination light and low human disturbance, and its population was expanding rapidly. In close canopy, however, juvenile and adult trees were liable to be suppressed and die. Survival analysis of the static life table of the population showed that in the life history of the population, the death density and risk functions were both characterized by sharp fluctuation in the earlier stages and relative stability in the later stages. Human disturbance and the biological characteristics of the population led to a break in the population structure. Therefore, it is essential to reinforce nature conservation.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2005年第3期334-338,共5页
Journal of Southwest Agricultural University
基金
国家自然科学基金资助项目(39570130)
关键词
秃杉
种群结构
静态生命表
Taiwania flousiana Gaussen
population structure
static life table
