重庆特有濒危植物缙云黄芩种群生态位研究  

Niche Studies on Populations of Endangered Plant Scutellaria tsinyunensis of Endemic Species of Chongqing

作　　者：马凯阳 王有为[1] 郭晨慧[1] 陶琪[1] 邓洪平[1] 

机构地区：[1]西南大学生命科学学院/三峡库区生态环境教育部重点实验室,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2016年第1期45-50,共6页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：国家级大学生创新创业训练计划(201410635043);重庆市基础与前沿研究计划(cstc2013jcjA90020)

摘　　要：研究重庆特有濒危植物缙云黄芩Scutellaria tsinyunensis 9个群落20个主要物种的生态位特征,采用Levins生态位宽度、Hurlbert生态位宽度及Pianka生态位重叠等计算公式,测定了缙云黄芩9个群落中草本层20个主要物种的生态位宽度和生态位重叠.结果表明,群落中缙云黄芩的生态位宽度最大,其对环境资源利用能力较强,生态适应幅度较大;但与具有相同或相似环境要求的物种间生态位重叠也较大,表明它们对环境资源利用的相似度较高,物种间存在激烈的竞争.The niche characteristics have been studied of the twenty major species in nine Scutellaria tsinyunensiscommunities,an endangered plant endemic to Chongqing.And with the help of the equations of Levins＇niche and Hurlbert＇s niche breadths,the niche breadths have also been studied of the populations of Scutellaria tsinyunensis.The result shows that the niche breadths of the Scutellaria tsinyunensis are the greatest among the twenty major species we have studied,which indicates the abilities of utilizing resources are greater and the ecological adaptation of Scutellaria tsinyunensis is relatively stronger.With the help of Pianka＇s niche overlap we have further studied the niche overlap among different species in the sampled communities.The niche overlap among the species with the same or similar environment requirements are greater,which shows the competition among those species is intense in the communities.

关 键 词：缙云黄芩 生态位宽度 生态位重叠 

分 类 号：Q948.1[生物学—植物学]