摘要
常绿阔叶林是我国亚热带地区重要的森林植被类型之一,但由于人为干扰,目前仅有少量存在,并且主要以次生常绿阔叶林的形式存在。因此了解次生常绿阔叶林的种类组成和群落特征对于保护森林生物多样性非常重要。为了解东莞大屏嶂森林公园次生常绿阔叶林的种类组成与群落特征。按照CTFS(Center for Tropical Forest Science)样地建设标准,在该园的公园的次生常绿阔叶林建立了一个1600 m2(20 m×80 m)的动态监测样地。以样地内胸径(DBH)≥1 cm的木本植物为研究对象,分析群落的种类组成、区系特征、径级结构和群落稳定性。结果表明:群落中DBH≥1cm的木本植物一共867株,属于24科33属36种,其中壳斗科(Fagaceae)为主要优势种,占总个体数40.25%。其中重要值≥1的物种共有21种,占总个体数的93.66%,重要值最大的三个种依次是小叶青冈(Cyclobalanopsis myrsinifoliacc)、黧蒴锥(Castanopsis fissacc)和小果核果茶(Pyrenaria macrocarpa)。在属的水平上,热带区系成分占总属数的83.6%,温带成分占16.7%。样地内所有个体的径级分布呈倒“J”型,群落自我更新良好。采用改进的M-Godron法判断群落稳定性,曲线交点与稳定点之间的欧氏距离为20.591,距离较大,群落处于不稳定的状态。
Evergreen broad-leaved forest is one of the important forest vegetation types in the subtropical area of China.However,due to human disturbance,only a small amount exists and mainly exists in the form of secondary evergreen broad-leaved forest.Therefore,understanding the species composition and community structure of secondary evergreen broad-leaved forest is very important for protection of forest biodiversity.In this study,we analyzed the species composition,floristic characteristics,diameter class structure and community stability based on the data of all woody species with a diameter at breast(DBH)≥1 cm in a 1600 m2 sample plot in Dongguan Dapingzhang Forest Park.The result showed that there were 867 woody plants with DBH≥1 cm in the community,belonging to 36 species,33 genera and 24 families.Fagaceae was the main dominant species,accounting for 40.25%of the total number of individuals.The 21 individual species with importance value≥1 contributed 93.66%to the total abundance.The three most abundance species were Cyclobalanopsis myrsinifoliacc,Castanopsis fissacc and Pyrenaria macrocarpa.At the genus level,the tropical and temperate compositions accounted for 83.6%and 16.7%,respectively.The DBH distribution of all individuals in the plot showed a reverse“J”pattern,indicating good regeneration of community.The improved M-Godron method was used to judge the stability of the community.The Euclidean distance between the intersection point of the curve and the stable point was 20.591,showing an unstable state of the community.
作者
王静宜
林育述
黄练忠
徐庆华
胡科
戴淑仪
陆龙威
欧阳磊
戴小华
赵平
WANG Jingyi;LIN Yushu;HUANG Lianzhong;HU Ke;DAI Shuyi;LU Longwei;OUYANG Lei;DAI Xiaohua;ZHAO Ping(Gannan Normal University,Ganzhou 341000,China;South China Botanical Garden,the Chinese Academy of Science,Guangzhou 510070,China;Dapingzhang Forest Park,Dongguan 523710,China)
出处
《生态科学》
CSCD
北大核心
2024年第6期121-128,共8页
Ecological Science
基金
国家自然科学基金联合基金重点项目(U21A2003)。
关键词
大屏嶂森林公园
种类组成
区系特征
径级结构
群落稳定性
Dapingzhang Forest Park
species composition
floristic characteristics
size class structure
community stability
