突脉青冈群落乔木层优势种群生态位研究  

Study on the niches of dominant populations on arbor layer in Cyclobalanopsis elebaticostata community

作　　者：王念奎[1,2] 李海燕[1] 荣俊冬[1] 高楠[3] 郑郁善[1] 

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福建省林业调查规划院,福建福州350003 [3]福建省林业科学研究院,福建福州350012

出　　处：《福建林学院学报》2010年第2期128-132,共5页Journal of Fujian College of Forestry

基　　金：福建省重大科技资助项目(2003I007)

摘　　要：采用统计学、数学方法对突脉青冈群落乔木层生态位状况进行定量分析,揭示突脉青冈群落优势种群生态位特征,以恢复其退化生态系统的树种结构和生态功能。结果表明,突脉青冈和米槠生态位较宽,其生态位值分别为0.96和0.83,群落内其它树种的生态位宽度在0.2-0.4之间。生态位相似比例和生态位重叠值表明生态位宽度较大的种,在群落中与其他种生态位相似比例和生态位重叠值较高。说明突脉青冈和米槠2个树种是群落中的优势种群,能更好地适应当地环境,充分利用群落中的资源。该群落继续向前发展,可能发展成为突脉青冈和米槠占优势的顶级群落。Cyclobalanopsis elebaticostata population is explored, using adjacent gridding after perspective investigation, and using the methods of mathematics and statistics. Analysis results indicate Cyclobalanopsis elebaticostata and Cyclobalanopsis elebaticostata′s niche breadths are wider, and the values of niche breadths are 0.96 and 0.83, which indicate the two species can adapt to the change of environment and can make use of resource of the community. The niche breadths of Rhododendron simsii, Dendropanax chevalieri, Castanopsis fabri, Cunninghamia lanceolata are more narrow than those of Cyclobalanopsis elebaticostata and Castanopsis carlesll, but are also around 0.5, which indicates they are superior in the moist environment caused by Cyclobalanopsis elebaticostata. In the natural forest of Cyclobalanopsis elebaticostata, the most of niche breadths are from 0.2 to 0.4. It accounts for 40% of trees. The importance values of the species are relative lower, and niche breadths are lower than those of Cyclobalanopsis elebaticostata, Castanopsis carlesll and other tall trees, the niche breadths of Cyclobalanopsis elebaticostata, Castanopsis carlesll are from 0.8 to 1.0. We can conclude the two species are dominant and form a climax community. The percentage of similarity between main species in Cyclobalanopsis elebaticostata natural forest is high, the percentage of similarity between Cyclobalanopsis elebaticostata and other species is higher, and this indicates the percentage of similarity changes along with niche breadths. There are 30 species-species whose niche overlap is more than 0.5, accounting for 28.57%; and there are 47 of which niche overlap value is higher than equal value 0.35. The higher ones are Cyclobalanopsis elebaticostata-Ilex asprella, Castanopsis fabri-Machilus kwangtungensis, Castanopsis fabri Hance-Dendropanax chevalieri. There niche similarity is also higher than the equal value 0.15, it indicates that there is positive relationship between niches overlap and niche similarity.

关 键 词：突脉青冈 生态位 乔木层 种群 

分 类 号：S718.5[农业科学—林学]