广西灵渠流域青冈栎群落主要种群生态位分析  

Niche Analysis of Main Populations in Cyclobalanopsis glauca Community in Lingqu Basin of Guangxi,China

作　　者：张仕艳 谢强[1,2] 黄丽娟[1,2] 黄庆 冯学宇 苏华龙[1,2] ZHANG Shiyan;XIE Qiang;HUANG Lijuan;HUANG Qing;FENG Xueyu;SU Hualong(College of Life Sciences,Guangxi Normal University,Guilin Guangxi 541006,China;Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University),Ministry of Education,Guilin Guangxi 541006,China)

机构地区：[1]广西师范大学生命科学学院,广西桂林541006 [2]珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学),广西桂林541006

出　　处：《广西师范大学学报（自然科学版）》2021年第6期162-173,共12页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(RZ1900001006)。

摘　　要：为了解灵渠流域青冈栎群落主要木本植物的生态位特征,在对其进行群落调查的基础上,利用Levins和Shannon-Wiener生态位宽度、Pianka生态位重叠和Schoener生态位相似性,对青冈栎群落乔木层和灌木层主要物种的生态位进行定量分析。结果表明:1)重要值较大的物种,其生态位宽度一般较大,但两者大小在排序上并不完全一致。2)乔木层的青冈栎、清香木和灌木层的红背山麻杆、檵木的生态位宽度较大。3)在青冈栎群落中,主要植物种群生态位重叠及生态位相似性均集中在较低水平(生态位重叠值:乔木层物种为0.1~0.4,灌木层物种为0~0.2;生态位相似性值:乔木层物种为0.2~0.5,灌木层物种为0~0.4),表明物种对环境资源的利用相似度不高。4)生态位宽度与生态位重叠并没有显著的相关关系。物种的生态位宽度大但重叠值不一定高,生态位宽度小重叠值不一定低。5)生态位重叠值大的物种,生态位相似性一般也大。青冈栎群落属于地带性顶级群落,物种间竞争不激烈,种间关系和谐,但物种更新缓慢有衰退的趋势。To understand the niche characteristics of the main woody plant populations in the Cyclobalanopsis glauca community in Lingqu basin,quantitative analysis was carried for the niche of the main species in the arbor layer and shrub layer of the C.glauca community by using the niche breadth of Levins and Shannon-Wiener,the niche overlap of pianka and the niche proportional similarity of Schoener.The results showed that:1)The species with larger importance values generally had larger niche breadth,but the rank orders of which were not exactly the same.2)C.glauca and Pistacia weinmannifolia in the arbor layer,Alchornea trewioides and Loropetalum chinense in the shrub layer had higher niche breadth than other species.3)In the C.glauca community,the niche overlap and niche proportional similarity of the main plant populations were concentrated at a low level,(niche overlap values:0.1-0.4 for arbor layer species,0-0.2 for shrub layer species;niche proportional similarity value:0.2-0.5 for arbor layer species,0-0.4 for shrub layer species),which indicated that the similarity degree of species’utilization of environmental resources was not high.4)There was no significant correlation between niche breadth and niche overlap,when the niche breadth of species was large but the niche overlap was not necessarily high,and when the niche breadth was small,the niche overlap was not necessarily low.5)The niche proportional similarity of species with large niche overlap value was also large.The C.glauca community belongs to the top zone community.The competition among species is not fierce and the inter specific relationship is harmonious,but the species regeneration is slow and demonstrates a declining trend.

关 键 词：青冈栎 生态位 多样性 种群 植被恢复 灵渠流域 

分 类 号：S718.5[农业科学—林学] Q948.1[生物学—植物学]