壶瓶山自然保护区珍稀濒危植物珙桐群落的研究  

Study on community of rare and endangered plant Davidia involucrate in Hupingshan Nature Reserve of Hunan province

作　　者：刘海洋[1] 金晓玲[1] 薛会雯[1] 张程[1] 石求辉[1] 张日清[2] 

机构地区：[1]中南林业科技大学环境艺术设计学院,湖南长沙410004 [2]中南林业科技大学林学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2011年第4期31-36,41,共7页Journal of Central South University of Forestry & Technology

基　　金：国家林业局野生植物珍稀濒危物种调查监管项目"珙桐野生种群调查及生境评估"(2008-354)

摘　　要：为了解湖南省壶瓶山自然保护区内野生珙桐资源的分布和植物群落情况,采用样方调查法,对野生珙桐资源的分布、植物群落特点和生境进行了调查研究。结果表明:(1)珙桐群落中共有维管束植物65种,隶属37科59属。植物区系组成以东亚分布最多,达16属,占27.1%。其次是北温带分布,共12属,占20.3%。珙桐群落区系的温带成分所占比例大于热带成分,其种类组成具有亚热带向温带过渡的特征。(2)群落垂直结构可分为乔木层、灌木层、草本层和层间植物。乔木层及灌木层不发达,草本层较发达。群落根据Raunkiaer生活型谱划分以高位芽植物占优势(32.3%),与其它亚热带常绿落叶林生活型谱各项比率相近似。(3)群落中珙桐的重要值为70.3,为群落中优势种;Simpson指数(D)和Shannon-wiener指数(H)草本层均高于乔木层和灌本层;Pielou均匀度指数Jsw,Js乔木层均高于灌本层和草本层。(4)种群年龄结构及空间分布格局显示,壶瓶山自然保护区珙桐群落未达到一个稳定状态,整个种群呈集群分布。珙桐自然更新能力差,种子萌发率低,实生苗少,主要以萌芽更新为主。The resources and community structure of Davidia involucrata in Hupingshan Nature Reserve of Hunan province were studied by using the sample plot method.The results show that：（1） There were 65 vascular plant species in the community belonging to 37 families and 59 genera.The composition of Davidia involucrata community mainly consists of the East Asia distribution,the rate reached to 27.1 %（16 genera）,and the next was North Temperate distribution,about 20.3%（12 genera）.The component of species had the typical characteristics that it is from the subtropics to the temperate zone.（2） The community vertical structure was simple,which composed of tree layer,shrub layer,herb layer and interlayer plant.Herb layer grew better than tree layer and shrub layer.In term of life form,32.3% phanerophytes were on the top,the composition of life form was similar to that in subtropical evergreen and deciduous forest.（3） The importance value of Davidia involucrata was 70.3,The Simpson and Shannon-wiener diversity indices in herb layer were higher than that in tree layer and shrub layer.The Pielou indexs（Jsw and Js） in tree layer were higher than herb layer and shrub layer.（4） According to the age structure.It＇s indicated that Davidia involucrata community in Hupingshan Nature Reserve had not yet developed into its climax,and the spatial pattern of the whole population was of clumping distribution.Natural regeneration ability of Davidia involucrata was weak and seed germination was low,and seedling rate was less,the forest rehewal was given priorty to shooting.

关 键 词：珙桐 群落结构 空间格局 壶瓶山自然保护区 

分 类 号：Q948[生物学—植物学]