茂兰喀斯特森林群落优势乔木种群空间分布格局及关联性  

Spatial Distribution Pattern and Correlation of Dominant Tree Population in Karst Forest Communities in Maolan

作　　者：王琨 安明态[1,2] 张央[1,2] 余江洪 刘锋 文伟 WANG Kun;AN Ming-tai;ZHANG Yang;YU Jiang-hong;LIU Feng;WEN Wei(Forestry College of Guizhou University,Guiyang Guizhou 550025,P.R.China;Research Center for Biodiversity and Nature conservation of Guizhou University,Guiyang Guizhou 550025,P.R.China)

机构地区：[1]贵州大学林学院,贵州贵阳550025 [2]贵州大学生物多样性与自然保护研究中心,贵州贵阳550025

出　　处：《西部林业科学》2022年第6期71-78,共8页Journal of West China Forestry Science

基　　金：“十三五”国家重点研发计划课题(2016YFC05026040);贵州省科技计划重大专项(黔科合JZ字[2014]2002)。

摘　　要：为探究茂兰喀斯特森林群落优势乔木种群空间分布及联结特征,揭示其群落物种多样性形成及维持机制,采用扩散系数、负二项式指数、丛生指数等7个聚集强度指数,对茂兰喀斯特森林群落重要值大于1%的乔木树种进行空间分布格局研究,并采用方差比率法、χ~2检验、联结系数(AC)进行关联性分析。结果显示:研究区24个优势乔木种群均呈聚集分布;在关联分析上,乔木优势种群总体种间关联性呈不显著负关联,各物种间趋于独立;χ~2检验、联结系数AC。结果表明,276个种对中有130对呈正关联,146对呈负关联,正负比为0.89,绝大部分种对呈不显著关联,种对间独立性较强。通过聚类分析,将群落中24种优势乔木种群分成3个生态种组,各生态种组具有不同的生态适应性。In order to explore the spatial distribution and association characteristics of dominant tree population in Maolan Karst forest community,and reveal the formation and maintenance mechanism of community species diversity,the spatial distribution pattern of tree species with importance value greater than 1%in Karst forest communities in Maolan was studied by using diffusion index,neg-ative binomial parameter and clustering index and other seven aggregation intensity index,and the correlation was studied by using variance ratio method,χ~2 test and association coefficient.The results showed that all the 24 dominant tree populations were clustered.In terms of correlation analysis,the overall interspecific correlation of dominant tree population showed no significant negative correlation,and each species tended to be independent.The results ofχ~2 test showed that 130 species pairs were positively correlated with each other,146 species pairs were negatively correlated with each other,and the positive and negative ratio was 0.89.Most species pairs were not significantly correlated with each other.By cluster analysis,24 dominant tree populations were divided into three ecological species groups,each of which had different ecological adaptability.The results of this study can provide theoretical basis for species coexistence mechanism and vegetation restoration in karst region.

关 键 词：喀斯特森林 优势乔木 空间分布格局 关联性 生态种组 茂兰 

分 类 号：S718.54[农业科学—林学]