摘要
为探究安龙油果樟(Syndiclis anlungensis)生境植物群落特征和物种多样性,掌握其生长习性,为今后扩大种群数量,科学保护该物种提供技术支撑。采用样方法调查安龙油果樟分布点的植物群落,分析其物种组成、区系特征、生活型谱、群落结构、物种多样性及种类竞争。结果表明:(1)物种组成:在调查的两个点中,王院村的安龙油果樟植物群落样地共记录到维管束植物29科38属42种;坡老村的记录到维管束植物28科41属45种。(2)两个分布点种子植物科、属分布区类型以热带成分为主,热带成分的科占总科数的46.51%,热带成分的属占总属数的53.14%。(3)样地植物生活型谱以高位芽植物为主,占总数的79%。(4)群落垂直结构分为乔木层、灌木层、草本层,乔木层树高在6~9 m区域间比例最大,占总株数的63.89%。灌木层物种高度是1~2 m区域间最多。从径级结构来看,乔木层和灌木层植物都以小径级为主,径级结构呈“倒J型”。(5)化香树(Platycarya strobilacea)和岩生鹅耳枥(Carpinus rupestris)在乔木层占优势地位;针齿铁仔(Myrsine semiserrata)和纪如竹(Ampelocalamus calcareus)在灌木层占主导,草本层主要以石油菜(Pilea cavaleriei)为主。(6)该植物群落不同层次α多样性表现为Margalef指数、Simpson指数和Shannon-wiener指数均显示灌木层>乔木层>草本层,Pielou指数表现为:灌木层>草本层>乔木层。(7)种内竞争指数:GI≥3的树种有化香树和南酸枣(Choerospondias axillaris),两者的(GI)指数分别为5.89和3.94,平均竞争指数为4.92,占到了总竞争指数的35.85%。
Syndiclis anlungensis H.W.Li is one of the most typical tree species that grown in the subtropical biome.This study aims to explore the habitat community characteristics and species diversity of the tree in Guizhou Province of China.The distribution points of plant communities were also investigated to determine the growth habits using sample method.A systematic analysis was implemented to explore the species composition,floristic characteristics,life type spectrum,community structure,species diversity and competition.The results show that:(1)In species composition,the total of 42 species of vascular plants belonged to 38 genera in the two sites.Among them,29 families were recorded in the communities of Wang Yuan village.Po Lao village recorded 45 species of vascular plants in 28 families,41 genera.(2)The distribution types of seed plants and genera were mainly tropical components in the two distribution points,which was accounted for 46.51%in the total families and 53.14%in the total genera.(3)The life type spectrum of the sample plants was represented by the high-budding plants,accounting for 79%of the total;(4)The vertical structure of the community was divided into the arbor,shrub,and herbaceous layer.The proportion of tree height in the arbor layer was the largest in the area of 6-9m,accounting for 63.89%of the total number of plants.The height of shrub species was 1-2m,indicating the most interregional.Furthermore,both the tree and shrub layer plants were the trail level,whereas,the diameter level structure was in"inverted J-shaped"mode.(5)Platycarya strobilacea and Carpinus rupestris were predominated in the arbor layer,while Myrsine semiserrata and Ampelocalamus calcareus were the shrub layer,and the herbaceous layer was dominated by the petroleum plant Pilea cavaleriei.(6)The diversityαdifferent levels of the plant community was manifested as follows.Margalef index,Simpson index,and Shannon Wiener index were ranked in the descending order of shrub layer>tree layer>herb layer.Pielou index was ranked the
作者
陈锐
徐超然
黄郎
李茂
杨成华
CHEN Rui;XU Chaoran;HUANG Lang;LI Mao;YANG Chenghua(Guizhou Academy of Forestry,Guiyang 550005,Guizhou,P.R.China)
出处
《贵州林业科技》
2023年第3期30-37,44,共9页
Guizhou Forestry Science and Technology
基金
“极危植物安龙油果樟扩繁技术研究”(黔林科合J字[2019]11号)
“贵州极危特有种安龙油果樟(Syndiclis anlungensis)濒危机制研究”(黔科合基础—ZK[2022]一般240)。
关键词
安龙油果樟
生境群落
区系
群落结构
物种多样性
种内竞争
Syndiclis anlungensis
habitat community
floristic
community structure
biodiversity
competition of species
