星斗山观赏植物交让木种群特征研究  

Study on the Population Characteristics of Ornamental Plant Daphniphyllum macropodum Miq. in Xingdoushan Nature Reserve

作　　者：姚兰[1] 艾训儒[1] 易咏梅[1] 卢璇[1] 

机构地区：[1]湖北民族学院林学园艺学院,湖北恩施445000

出　　处：《湖北民族学院学报（自然科学版）》2015年第2期165-169,共5页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：湖北省教育厅重点项目"清江流域退化生态系统植被恢复生态效应评价"(D20122901)

摘　　要：对星斗山国家级自然保护区常绿落叶阔叶混交林群落中的观赏植物交让木种群特征进行了研究，结果表明：交让木种群年龄结构呈正金字塔型，是典型的增长型种群；其种群个体主要分布在群落9m以下的垂直空间范围；在海拔梯度上，由于群落发育程度和生境条件的差异，在1400～1500 m梯度范围内，种群个体分布数量最多；其种群个体分布格局为集群分布模式；生命表分析显示，交让木种群DBH1径级幼苗位于群落最下层空间，与其它种群个体幼苗竞争资源和空间的优势不明显，生存能力较弱，期望寿命不高，该种群存活曲线为“Ⅱ型”存活曲线，其存活率在各生活史阶段大致相当。In this paper , the population characteristics of ornamental plant Daphniphyllum macropodum Miq.in evergreen and deciduous broad-leaved mixed forest in Xingdoushan Nature Reserve were studied . The results showed that： the population age structure of Daphniphyllum macropodum Miq.is pyramid-shaped ,a typical type of population growth;its population of individuals are mainly distributed in vertical space of the community under 9 m;on the elevation gradient ,because of the reasons of the development degree of community and habitat conditions ,in the 1 400~1 500 m range gradient,the largest number of individuals of the population distribution;the population distribution patterns is cluster;the life table anal-ysis showed that , in the first grade DBH 1 diameter seedlings in the community , the Daphniphyllum macropodum Miq.located lowest and the advantage of other individuals in a population seedling competi -tion for resources and space is not obvious , viability is weak , life expectancy is not high , the population survival curve for ″Ⅱtype″,the survival rate in each life story stage are roughly equal .

关 键 词：星斗山 交让木 种群特征 观赏植物 

分 类 号：S718.52[农业科学—林学]