天目山紫楠种群年龄结构与点格局分析  

Age structure and spatial point pattern of Phoebe sheareri population in Mount Tianmu

作　　者：范忆 楼一恺 库伟鹏 戴其林 王铮屹 赵明水[3] 余树全[1] FAN Yi;LOU Yikai;KU Weipeng;DAI Qilin;WANG Zhengyi;ZHAO Mingshui;YU Shuquan(School of Forestry and Biotechnology,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;School of Environmental and Resource Sciences,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Management Office,National Nature Reserve of Tianmu Mountain,Hangzhou 311311,Zhejiang,China)

机构地区：[1]浙江农林大学林业与生物技术学院,浙江杭州311300 [2]浙江农林大学环境与资源学院,浙江杭州311300 [3]浙江天目山国家级自然保护区管理局,浙江杭州311311

出　　处：《浙江农林大学学报》2020年第6期1027-1035,共9页Journal of Zhejiang A&F University

基　　金：浙江省重点研发计划项目(2017C02028);天目山国家级自然保护区生物多样性长期监测样地建设项目。

摘　　要：【目的】研究天目山紫楠Phoebe sheareri种群年龄结构和空间分布格局,有利于更好地保护天目山紫楠种群,为森林管理提供依据。【方法】基于浙江省天目山常绿阔叶林1 hm2(100 m×100 m)样地调查数据,分析了优势种紫楠种群的年龄结构,并按胸径(DBH)将其分为5个径级,分别为径级1(1.0 cm≤DBH<2.5 cm)、径级2(2.5 cm≤DBH<10.0 cm)、径级3(10.0 cm≤DBH<20.0 cm)、径级4(20.0 cm≤DBH<30.0 cm)、径级5(DBH≥30.0 cm)。同时,应用点格局方法分析了不同径级个体的空间分布格局以及空间关联性。【结果】①径级1和径级2低龄个体较多,占总统计量的68.95%,径级3个体占23.71%,径级4和径级5高龄个体较少,占7.34%。种群的存活曲线接近DeeveyⅠ型,属于增长型发展模式。②径级1、径级2、径级3、径级4个体以聚集型分布为主,且随着研究尺度的增大,聚集性也越显著,径级5以随机分布为主。③各径级间关系密切,以正关联为主。从小尺度观察,径级1与径级4个体在0~5 m尺度内是负关联,径级3与径级4个体在0~8 m尺度内是负关联,径级3与径级5个体在0~4 m尺度内是负关联。除此之外,其他径级个体之间皆为正关联。从大尺度观察,天目山紫楠种群各径级个体之间基本都呈显著正关联。【结论】天目山紫楠种群属于增长型的发展模式,各径级都呈集群分布,不同径级间的关系密切,以正关联为主。[Objective] This research aims to study the age structure and spatial pattern of Phoebe sheareri population in Mount Tianmu, so as to better protect the population and provide basis for forest management.[Method] Based on the survey data of 1 hm2(100 m×100 m) of evergreen broad-leaved forests in Mount Tianmu of Zhejiang Province, the age structure of dominant species P. sheareri population was analyzed.According to the diameter at breast height(DBH), the population was divided into five diameter classes: diameter class 1(1.0 cm≤DBH< 2.5 cm), diameter class 2(2.5 cm≤DBH< 10.0 cm), diameter class 3(10.0 cm≤DBH< 20.0 cm), diameter class 4(20.0 cm≤DBH< 30.0 cm), diameter class 5(DBH≥30.0 cm). The point pattern method was used to analyze the spatial distribution pattern of P. sheareri and spatial correlation of individuals of different diameter classes. [Result](1) 68.95% were young individuals in diameter class 1 and diameter class 2, 23.71% in diameter class 3, 7.34% in diameter class 4 and diameter class 5. The survival curveof the population was close to Deevey type I, belonging to the growth-oriented development model.(2) The individuals of diameter class 1, diameter class 2, diameter class 3 and diameter class 4 were mainly distributed in clusters, and with the increase of research scale, the aggregation was more significant, and diameter class 5 was mainly of random distribution.(3) There existed a close relationship between diameter classes, displaying a dominant positive correlation. In small scale observation, diameter class 1 and diameter class 4 were negatively correlated in the scale of 0-5 m, diameter class 3 and diameter class 4 were negatively correlated in the scale of0-8 m, and diameter class 3 and diameter class 5 were negatively correlated in the scale of 0-4 m. All other diameter individuals were positively correlated. From the large-scale observation, there was a significant positive correlation between individuals of different sizes in P. sheareri population. [Conclusion] The populati

关 键 词：森林生态学 紫楠 点格局分析 年龄结构 空间分布格局 空间关联性 

分 类 号：S718.5[农业科学—林学]