雷公山自然保护区野猪塘水青冈种群结构动态分析  

Dynamic Analysis of Population Structure of Fagus longipetiolata in Wild Boar Pond of Leigong Mountain Nature Reserve

作　　者：李登江 郑德谋 余德会 古定豪 谢镇国 吴必峰 LI Deng-jiang;ZHENG De-mou;YU De-hui(Leigongshan National Nature Reserve Administration,Leishan,Guizhou 557100)

机构地区：[1]贵州雷公山国家级自然保护区管理局,贵州雷山557100

出　　处：《安徽农业科学》2023年第9期90-92,96,共4页Journal of Anhui Agricultural Sciences

基　　金：贵州省天然林保护工程管理中心项目“贵州雷公山常绿落叶阔叶混交林生长演替监测”。

摘　　要：为揭示水青冈(Fagus longipetiolata)种群结构及其动态特征,选取天然种群集中分布地段,采用相邻格子法设置典型群落样地,从水青冈自然种群的胸径结构特征对其种群结构及数量动态变化进行分析。结果表明:水青冈种群结构整体呈金字塔形;种群的幼龄个体数充足,其个体数量占种群总数量的63.16%,为典型的增长型种群;存活曲线趋于Deevey-Ⅲ型。种群数量随着龄级结构的增加呈减小—增大—减小的趋势,而种群标准化存活个体数l_(x)和标准化存活对数lnl_(x)随着径级的增大逐渐减小,个体平均期望寿命e x随着径级的增加呈先增加后降低的趋势;种群死亡率q_(x)和损失度K_(x)曲线变化趋势一致,均呈现出降低—升高—降低—升高—降低—升高的复杂动态变化,表明种群易受外界环境干扰,处于极不稳定的状态。In order to reveal the population structure and dynamic characteristics of Fagus longipetiolata,the natural population concentrated distribution area was selected,and the adjacent grid method was used to set up typical community sample plots.The population structure and quantitative dynamic changes of Fagus longipetiolata were analyzed from the DBH structure characteristics of the natural population.The results showed that the population structure of Cyclobalanopsis glauca showed a pyramid shape as a whole;The population has sufficient young individuals,accounting for 63.16% of the total population,which is a typical growing population;The survival curve tended to deevey-Ⅲ type.The population size showed a decreasing increasing decreasing trend with the increase of age class structure,while the number of standardized surviving individuals l_(x) and the number of standardized surviving logarithm lnl_(x) gradually decreased with the increase of diameter class,and the average life expectancy e_(x) of individuals increased first and then decreased with the increase of diameter class.The trend of mortality q_(x) and loss degree K_(x) curve is the same,showing a complex dynamic change of decrease-increase-decrease-increase-decrease,indicating that the population is vulnerable to external environmental interference and is in a very unstable state.

关 键 词：水青冈 种群结构 静态生命表 雷公山自然保护区 

分 类 号：S759.9[农业科学—森林经理学]