秦岭冷杉群落主要种群生态位研究  

Study on the Niche of the Main Populations in Abies chensiens Community

作　　者：史小华[1] 许晓波[1] 张文辉[1] 

机构地区：[1]西北农林科技大学,杨凌712100

出　　处：《植物研究》2007年第3期345-349,共5页Bulletin of Botanical Research

基　　金：中国科学院知识创新工程重要方向课题(KSCX2-SW-104-04)

摘　　要：基于对秦岭山区濒危植物秦岭冷杉(Abies chensiensis)分布群落的样地调查,采用定量分析的方法,研究了秦岭冷杉群落中主要种群的生态位宽度、生态位相似性比例和生态位重叠,结果表明:(1)分别用Levins和Shannon-weiner两指数测得的主要种群的生态位宽度结果基本一致,即乔木、灌木和草本层中生态位宽度最大的依次为秦岭冷杉、箭竹(Sinarundinaria nitida)和苔草(Carexlanceolata),秦岭冷杉与生态位宽度值大的种群易形成混交林;(2)生态位宽度较高的两个种群,种对相似性比例一般较高;(3)秦岭冷杉群落中各主要种群之间的生态位重叠程度较低,表明种群对群落环境资源的分享比较充分,群落处于相对稳定状态。Based on the data collected from the plots investigation along with the implementation Levins, Shannon weiner index and niche overlap formulas in Mt. Qinling Shaanxi, the niche breadth values, niche similarity and niche overlap values of the main tree species were measured in the forestry of Abies chensiensis in this study. The results showed that： with the respective Levins and Shannon weiner index, the results of niche breadths of the main populations were almost the same and the highest value of niche breadth in arbor layer, shrub layer and herb layer were Abies chensiensis, Sinarundinaria nitida and Carex lanceolata, respectively. Abies chensiensis was prone to form mixed forest with populations with high value of niche breadth. In the populations with high value of niche breadth, the niche similarity was generally higher accordingly. Niche overlaps extents of main populations in Abies chensiensis community were correspondingly lower, indicated that the environmental resource could be shared by every population and the community was comparative stable.

关 键 词：秦岭冷杉 种群 生态位宽度 生态位相似性比例 生态位重叠 

分 类 号：S812[农业科学—草业科学]