中南林业科技大学学报2025，Vol.45Issue(5)：77-88,102,13.DOI:10.14067/j.cnki.1673-923x.2025.05.008
苍山西坡常绿阔叶林乔木层优势种生态位特征及种间联结
Niche and interspecific association of dominant species in tree layer of broad-leaved evergreen forests on the western slope of the Cangshan mountain
摘要
Abstract
[Objective]In order to understand the ecological niche characteristics and interspecific relationships of dominant tree species in the evergreen broad-leaved forest stratum on the west slope of Cangshan mountain,and to reveal the ecological niche width and overlap characteristics of dominant species,in order to further comprehend the coexistence mechanisms and succession patterns of community species,and to provide a scientific basis for forest resource protection and management.[Method]Based on plot survey data,this study focused on the dominant populations of the tree layer in the evergreen broad-leaved forest on the west slope of Cangshan mountain.The Levins index,Shannon-Wiener index,Pianka index,and Schoener index were used to analyze the ecological niche width,overlap,and similarity of the dominant tree species.Additionally,methods such as variance ratio,x2 test,interspecific connectivity coefficient,and Spearman rank correlation test were employed to analyze connectivity characteristics.[Result]1)The dominant tree species in the evergreen broad-leaved forest on the west slope of Cangshan mountain include Vaccinium bracteatum,Alnus nepalensis,Rhododendron irroratum,Rhododendron delavayi,Schima argentea and Castanopsis orthacantha;2)Among the 190 species pairs formed by the 20 dominant species,Vaccinium bracteatum has the largest ecological niche width,while Schima argentea has the smallest,with an average ecological niche width of 0.18.The majority of species pairs have low ecological niche overlap,indicating a high degree of differentiation among dominant tree populations;3)The overall interspecific relationships among the dominant tree species in the tree layer are positive,but a significant portion also show negative relationships,with indistinct differences,suggesting that the connectivity among dominant species is not tight,and some species are in a relatively loose state of interspecific connectivity.[Conclusion]The evergreen broad-leaved forest on the west slope of Cangshan mountain is generally in a relatively stable stage of late succession.Vaccinium bracteatum has the highest frequency and ecological niche width,and possesses strong resource utilization capabilities and environmental adaptability,which helps maintain community stability.The majority of dominant tree species pairs on the west slope of Cangshan mountain have low ecological niche overlap,indicating a high degree of ecological niche differentiation among dominant tree species,weak interspecific competition,relatively independent distribution of dominant species,and more stable interspecific relationships.In future vegetation restoration processes,species with positive connectivity and low ecological niche overlap values can be supplemented to fully utilize the unique ecological environment resources of Cangshan to form a more stable forest community.关键词
苍山西坡/优势种/常绿阔叶林/生态位/种间联结Key words
western slope of Cangshan mountain/dominant species/broad-leaved evergreen forest/niche/interspecific association分类
农业科技引用本文复制引用
王李娟,马长乐,杨建欣,龚买玉,龚郁舒,杨恒屹,刘佳,孙永玉..苍山西坡常绿阔叶林乔木层优势种生态位特征及种间联结[J].中南林业科技大学学报,2025,45(5):77-88,102,13.基金项目
云南省农业联合专项重点项目(202301BD070001-150) （202301BD070001-150）
云南省农业联合面上项目(202101BD070001-100) （202101BD070001-100）
西南林业大学风景园林科研预研基金(18210171). （18210171）
