百山祖国家公园五岭坑常绿阔叶林甜槠的种群特征  

The Population Characteristics of Castanopsis eyrei in Evergreen Broad-leaved Forest in Wulingkeng of Baishanzu National Park

作　　者：蔡焕满 吴素美 吴逸卿 熊艳云 林阳 毛志斌 吴友贵 吴秋丰 CAI Huanman;WU Sumei;WU Yiqing;XIONG Yanyun;LIN Yang;MAO Zhibin;WU Yougui;WU Qiufeng(Qingyuan Conservation Center of Qianjiangyuan-Baishanzu National Park,Qingyuan 323800,China;College of Life Sciences,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]钱江源-百山祖国家公园庆元保护中心,浙江庆元323800 [2]浙江大学生命科学学院,浙江杭州310058

出　　处：《浙江林业科技》2024年第1期1-7,共7页Journal of Zhejiang Forestry Science and Technology

基　　金：百山祖国家公园科研项目(2021ZDZX01、2021KFLY10);中央林业改革发展资金项目(财资环[2021]82号)。

摘　　要：甜槠Castanopsis eyrei是中亚热带常绿阔叶林的主要建群种,为了阐明其在百山祖国家公园五岭坑常绿阔叶林的种群特征,了解种群数量动态和发展趋势,在该群落3个不同海拔各建立1个1 hm^(2)固定监测样地,将每个样地划分成400个5 m×5 m的小样方进行群落调查。结果表明:从径级结构来看,甜槠种群稳定,更新能力强;除了其中1个样地的过熟树为随机分布外,其余的小树、中树、大树、过熟树均为集群分布,从小树到中树聚集程度逐渐减少;在Ⅰ~Ⅲ龄级,甜槠种群具有较大的生命期望,随着龄级的增加生命期望逐渐下降,对3个样地的甜槠种群密度进行比较,发现种群密度较小的样地,由于种内竞争不激烈,死亡率小,因而拥有较大的平均生命期望;甜槠种群的存活曲线符合Deevey-Ⅱ型,说明种群在各龄级的死亡率基本相近。In August 2022,permanent sample plot with 100 m×100 m were established in main distribution area of Castanopsis eyrei at altitude of 705 m,827 m and 974 m in evergreen broad-leaved forest in Wulingkeng of Baishanzu National Park,Zhejiang province.Investigations were carried out on population of C.eyrei.The result showed that the population of C.eyrei was stable and had strong regeneration ability from the view of diameter class structure.Small,medium,large,and over-mature trees were contagious distribution in two sample plot except over-matured trees randomly distributed in one plot.The aggregation degree gradually decreased from small trees to medium trees.At ages Ⅰ to Ⅲ,the population of C.eyrei had higher life expectancy,and gradually decreased with increase of age.Comparison on population density of C.eyrei in three sample plots demonstrated that the smaller density,the higher average life expectancy of the population.The population survival curve of C.eyrei conformed to Deevey-Ⅱ type,indicating that the mortality rate at each age class was similar.

关 键 词：常绿阔叶林 甜槠 径级结构 空间分布格局 静态生命表 存活曲线 

分 类 号：S718.54[农业科学—林学] S792.17