茂兰圆果化香群落主要种群生态位特征和种间联结性分析  

Niche Characteristics and Interspecific Associations of the Main Populations in Platycarya longipes Community in Maolan

作　　者：谭娅 罗小菊[2] 李秋英 王爽 吴高殷 刘映良[1] TAN Ya;LUO Xiao-ju;LI Qiu-ying;WANG Shuang;WU Gao-yin;LIU Ying-liang(School of Life Sciences,Guizhou Normal University,Guiyang 550025,Guizhou,China;Library of Guizhou Normal University,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州师范大学生命科学学院,贵州贵阳550025 [2]贵州师范大学图书馆,贵州贵阳550025

出　　处：《西北林学院学报》2023年第6期110-115,共6页Journal of Northwest Forestry University

基　　金：国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目(U1812401);国家自然科学地区基金项目(31760124);贵州省科技计划项目(黔科合平台人才[2017]5726)。

摘　　要：为了解茂兰圆果化香群落主要物种生态位特征及种间关联,采用Levins和Shannon-Wiener生态位宽度、Pianka生态位重叠和Schoener生态位相似性分析群落中物种生态位特征,方差比率法和贡献定律法探究群落稳定性,X^(2)检验和联结系数研究群落中主要物种种间关联。结果表明,1)圆果化香的重要值和生态位宽度最大,均能与其他物种发生生态位重叠。2)群落中物种的生态位宽度、生态位重叠及生态位相似性之间并没有正相关关系,表明物种的生态位特征与其斑块状分布及生态习性差异有关。3)该群落总体关联性为不显著负联结,且交点坐标远离稳定交点坐标,群落不稳定。4)X^(2)检验和联结系数表明,群落中绝大部分种对间呈不显著相关,种间联结松散,物种独立分布较强,群落处于不稳定演替晚期阶段并向正联结方向发展。圆果化香作为喀斯特区建群种,在群落演替过程中占有重要地位,更适应喀斯特环境。In order to understand the niche characteristics and interspecific associations of the main species in Platycarya longipes community in Maolan Nature Reserve of Guizhou Province,the Levins and Shannon-Wiener niche breadth,Pianka niche overlap and Schoener niche similarity were used for analyzing the niche characteristics of species in the community.Variance ratio and contribution law method were adopted to explore community stability,and X^(2)test and association coefficient were used to investigate the interspecific associations between the community species.The results showed that 1)the importance value and niche breadth of P.longipes were the largest,and it could overlap with other species in ecological niche.2)No positive correlations were found between niche breadth,niche overlap and niche similarity of species in community,indicating that niche characteristics of species are related to its patchy distribution and ecological habits.3)The overall correlation between the main species in the community presented non-significant and negative linkage,and the intersection coordinates were far from that of stable intersection point coordinates,indicating that the community is unstable.4)X^(2)test and association coefficient results showed that most of species in community were non-significantly correlated between pairs,interspecific linkages were loose,species independent distribution was strong,and community was in the late stage of unstable succession and developed in the direction of positive association.The P.longipes as the building species in Karst area,plays an important role in succession process of community and is more suitable for the Karst environment.

关 键 词：茂兰 圆果化香 生态位特征 种间联结性 喀斯特 

分 类 号：S718.5[农业科学—林学]