西北林学院学报2012，Vol.27Issue(2)：18-21,49,5.DOI:10.3969/j.issn.1001-7461.2012.02.04
东大河林区青海云杉种群结构与动态
Structure and Dynamics of Picea crassifolia Population in Dongdahe Forest Area of Qilian Mountains Nature Reserve
摘要
Abstract
With the method of spatial sere substituting for time sere, population size class structure substituting for age structure, and using standard life table and survival analysis, the structure and dynamics of Picea crassifolia population in Dongdahe forest area of Qilian Mountains Nature Reserve were studied. The results showed that the population structure in Dongdahe area was reasonable and it was an expanding population. Population survival curve accorded to Deevey Ⅱ , the mortality rate was stable in all life history. Population mortality rate, life expectancy and the disappearance rate fluctuated in seedling and sapling stages, as well as when the tree DBH reached 14 cm and 22 cm. The pressure of individuals to pass the environmental sieve increased. Population life tables and survival curves well represented the population dynamics trends of P. crassi folia population. Four survival functions appeared changes with different levels while the DBH reached 14 cm and 22 cm, in accordance with the result of population standard life table.关键词
东大河林区/青海云杉种群/静态生命表/生存分析Key words
Dongdahe forest area/ Picea crassi folia population/ standard life table/ survival analysis分类
农业科技引用本文复制引用
刘建泉,孙建忠,杨开恩,赵守平..东大河林区青海云杉种群结构与动态[J].西北林学院学报,2012,27(2):18-21,49,5.基金项目
甘肃省金昌市科技局星火计划项目(2009028). （2009028）
