广西十万大山山地常绿阔叶林优势种空间分布格局与关联性  

Spatial distribution pattern and correlation of dominant species of evergreen broad-leaved forest in Shiwandashan mountain

作　　者：姜冬冬 罗应华[1,2,3] 林建勇 何巧萍[1,2] 覃林 零雅茗[5] JIANG Dongdong;LUO Yinghua;LIN Jianyong;HE Qiaoping;QIN Lin;LING Yaming(Forestry College,Guangxi Key Laboratory of Forest Ecology and Conservation,Guangxi University,Nanning 530004,Guangxi,China;Laibin Jinxiu Dayaoshan Forest Ecosystems Observation and Research Station of Guangxi,Laibin 546100,Guangxi,China;Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,Guangxi,China;Fangchenggang Shiwandashan National Nature Reserve Administration Bureau,Fanagchenggang 538000,Guangxi,China)

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西大学广西森林生态与保育重点实验室,广西南宁530004 [3]来宾金秀大瑶山森林生态系统广西野外科学观测研究站,广西来宾546100 [4]广西壮族自治区林业科学研究院,广西南宁530002 [5]防城港市十万大山国家级自然保护区管理局,广西防城港538000

出　　处：《中南林业科技大学学报》2024年第1期151-161,共11页Journal of Central South University of Forestry & Technology

基　　金：广西自然科学基金项目(2021JJA130126);广西林草种质资源普查与收集项目(桂林科字[2021]第34号)。

摘　　要：【目的】山地常绿阔叶林是十万大山的主要植被类型,揭示其群落种群空间分布格局与关联性特征,有利于探讨群落物种竞争关系与维持机制。【方法】以十万大山1 hm^(2)山地常绿阔叶林样地重要值排名前6位的树种为研究对象,采用g(r)函数、方差比率法、Spearman秩相关系数分析种群空间分布格局和种内、种间相关性。【结果】以完全随机模型对样地群落优势种空间分布格局进行分析,发现优势种在1~11 m尺度上均呈聚集分布,云南桤叶树Clethra delavayi、银木荷Schima argentea、柔毛紫茎Stewartia villosa在1~25 m尺度上呈聚集分布;以异质泊松模型分析时,发现优势种在10~25 m尺度上均呈随机分布,表明优势种空间分布格局受生境异质性影响,且不同种群受影响的程度不同;样地微地形因子中海拔和坡度对优势种的格局分布影响较大;不同种群的龄级空间分布格局受个体密度影响较大,增长型种群幼龄个体聚集分布,随着龄级的增加其空间分布趋于随机分布,衰退型种群成年个体小尺度上聚集分布,幼龄个体随机分布;样地群落优势种的幼树、小树、成年树之间无种内竞争排斥关系,种内关联性均为正相关或无关联,种内关联性与尺度相关;群落优势种种间关联性总体呈正关联,种间正相关和无关联种对多于负相关种对,表明群落中优势种的种间竞争关系较弱,优势种间相互独立,利于物种共存。【结论】十万大山山地常绿阔叶林优势种的分布格局受生境异质性和密度制约的影响,且分布格局随尺度和发育阶段而变化。种内、种间关系多为正相关或无关联,群落优势种排斥竞争关系不显著,群落种群结构稳定。【Objective】Mountainous evergreen broad-leaved forest is the main vegetation type in Shiwandashan.In order to reveal the spatial distribution pattern and correlation characteristics of its community population,and to explore the competitive relationship and 2 maintenance mechanism of community species.【Method】The top 6 species with important value in the sample plot of 1 hm mountain evergreen broad-leaved forest in Shiwandashan were taken as the research object.By g(r)function,variance ratio and Spearman rank correlation coefficient were used to analyze the spatial distribution pattern and intra-specific and inter-specific correlation of the population.【Result】When using a complete stochastic model(CSR)to analyze the spatial distribution pattern of dominant species in the sample plot community,it was found that the dominant species were clustered on the scale of 1 to 11 m,while the Clethra delavayi,Schima argentea,and Stewartia villosa were clustered on the scale of 1 to 25 m;When analyzed using a heterogeneous Poisson model(HP),the dominant species were randomly distributed on a scale of 10-25 m;The spatial distribution patterns of the dominant species were all affected by habitat heterogeneity,but the degree of influence was different.Altitude and gradient had a significant impact on the pattern distribution of dominant species in the microtopography factors of the sample plot;The spatial distribution pattern of population at different age levels was affected by individual density,young individuals of the growing population tend to be clustered,and the distribution pattern tended to be random with the increase of age class;The adult individuals of the declining population were clustered on a small scale,and the saplings and small-aged individuals are randomly distributed;There was no intraspecific competition and exclusion relationship,and intraspecific correlation was positive or no correlation,and intraspecific correlation and scale correlation;The community was positively correlated as a whole,and

关 键 词：空间分布格局 种间关联性 种内关联性 山地常绿阔叶林 

分 类 号：S718.541[农业科学—林学]