西北林学院学报2024，Vol.39Issue(4)：71-78,8.DOI:10.3969/j.issn.1001-7461.2024.04.09
珍稀濒危植物江南油杉群落区系与种群动态分析
Flora Characteristics and Population Dynamics of Rare and Endangered Plant of Keteleeria fortunei var.cyclolepis
摘要
Abstract
Keteleeria fortunei var.cyclolepis is a national second-class key protected wild plant.To investi-gate the community status and population dynamics,K.fortunei var.cyclolepis community occurring in Fujian Junzifeng National Nature Reserve was taken as the object.Through sample survey and data statis-tics,species composition and floristic composition were analyzed,static life table,survival curve and surviv-al function curve were compiled,dynamic index of quantity was calculated,and time series model was cited.The purpose of this study was to investigate the community status and population dynamics of K.fortunei var.cyclolepis,and to provide theoretical basis for the conservation of this species.The results showed that 1)159 species of vascular plants in 97 genera and 54 families were found within the population,which were divided into 10 distribution types and 10 subtypes with heat/temperature ratio(R/T)of 1.81.2)The age structure of the population presented a"pyramid"type,with the absence of individuals at age Ⅶ.The pop-ulation as a whole presented a structure dynamic relationship of"growth-stability-recession-growth-de-cline"fluctuation.3)The population survival curve belonged to the"concave"type(Deevey-Ⅲ),with the maximum mortality and disappearance rate appearing in the Ⅰ age class and the minimum value appearing in the Ⅲ age class.4)The population survival rate decreased gradually,and the cumulative mortality rate gradually increased.The change trend of death density and mortality was basically the same after the sec-ond age class,and both showed the minimum value at the third age class,and then the change was basically flat.5)The time series model showed that the population would be dominated by small and medium trees,with little fluctuation in the number of elderly individuals.In conclusion,the K.fortunei var.cyclolepis population development stability is not high,the seedling mortality rate(94.1％)is high,the population size is gradually decreasing.It was suggested that the scientific artificial measures should be carried out,to conduct appropriate thinning,to create forest window,and to improve the forest living environment for the promotion of the growth of seedlings.关键词
江南油杉/珍稀濒危植物/植物区系/种群动态Key words
Keteleeria fortunei var.cyclolepis/rare and endangered plant/flora characteristics/population dynamics分类
农业科技引用本文复制引用
林碧华,陈绪辉,罗敏贤,陈泽平,张雨晨,刘宝,刘益鹏,郑世群..珍稀濒危植物江南油杉群落区系与种群动态分析[J].西北林学院学报,2024,39(4):71-78,8.基金项目
福建君子峰自然保护区维管植物资源调查项目(KH200237A). （KH200237A）
