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

作　　者：林碧华 陈绪辉 罗敏贤 陈泽平 张雨晨 刘宝[1] 刘益鹏 郑世群[1,2] LIN Bi-hua;CHEN Xu-hui;LUO Min-xian;CHEN Ze-ping;ZHANG Yu-chen;LIU Bao;LIU Yi-peng;ZHENG Shi-qun(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Key Laboratory of Fujian Universities for Ecology and Resource Statistics,Fuzhou 350002,Fujian,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]生态与资源统计福建省高校重点实验室,福建福州350002

出　　处：《西北林学院学报》2024年第4期71-78,共8页Journal of Northwest Forestry University

基　　金：福建君子峰自然保护区维管植物资源调查项目(KH200237A)。

摘　　要：江南油杉为国家二级重点保护野生植物,以福建君子峰国家级自然保护区江南油杉群落为对象,通过样地调查和数据统计,分析物种组成及植物区系成分,编绘静态生命表、存活曲线和生存函数曲线,计算数量动态指数,并引用时间序列模型,以探明江南油杉群落现状及种群动态,为该物种保护提供理论依据。结果表明,1)该群落有维管束植物54科97属159种,划分为10个分布区类型和10个亚型,热/温比值(R/T)为1.81。2)种群年龄结构呈“金字塔”形结构,第Ⅶ龄级个体缺失,总体呈现“增长-稳定-衰退-增长-衰退”的波动结构动态关系。3)种群存活曲线属于“凹”形(Deevey-Ⅲ型),死亡率和消失率最大值均出现在第Ⅰ龄级,最小值均出现在第Ⅲ龄级。4)种群生存率逐渐下降,累计死亡率逐渐增加,死亡密度和死亡率的变化趋势从第Ⅱ龄级后基本表现一致,均在第Ⅲ龄级出现最小值,之后变化基本持平。5)时间序列模型显示,种群将以小树和中树为主,老年个体的数量波动不大。综上所述,江南油杉种群发展稳定性不高,幼苗死亡率高(94.1%),种群规模呈逐渐缩小趋势,需通过开展科学的人工措施,适当疏伐,创造林窗,改善林内生存环境,从而促进幼苗生长。Keteleeria fortunei var.cyclolepis is a national second-class key protected wild plant.To investigate 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 statistics,species composition and floristic composition were analyzed,static life table,survival curve and survival 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 ageⅦ.The population as a whole presented a structure dynamic relationship of “growth-stability-recession-growth-decline”fluctuation.3) The population survival curve belonged to the “concave” type (Deevey-Ⅲ),with themaximum mortality and disappearance rate appearing in the Ⅰ age class and the minimum value appearingin the Ⅲ age class.4) The population survival rate decreased gradually,and the cumulative mortality rategradually increased.The change trend of death density and mortality was basically the same after the secondage class,and both showed the minimum value at the third age class,and then the change was basicallyflat.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.cyclolepispopulation development stability is not high,the seedling mortality rate (94.1%) is high,the populationsize is gradually decreasing.It was suggested that the scientific artifi

关 键 词：江南油杉 珍稀濒危植物 植物区系 种群动态 

分 类 号：Q948[生物学—植物学]