武夷山天然常绿阔叶林林隙物种多样性比较研究  

A comparing study on the tree species diversities of gaps in natural evergreen broad-leaved forest in Mountain Wuyi

作　　者：何国生[1] 林思祖[2] 曹子林[3] 赵大洲 来端 

机构地区：[1]福建林业职业技术学院,南平353000 [2]福建农林大学林学院,南平353001 [3]西南林学院,昆明650224 [4]邵武市林业规划队,邵武355400 [5]邵武市林业推广中心,邵武355400

出　　处：《中国生态农业学报》2004年第1期70-73,共4页Chinese Journal of Eco-Agriculture

基　　金：福建省自然科学基金项目 (C880 2 1)资助

摘　　要：对武夷山不同常绿阔叶林发育阶段林隙样地更新层物种多样性变化规律研究结果表明 ,林隙物种多样性指数大于非林隙样地 ,而生态优势度则相反 ;不同大小扩展林隙物种多样性指数不同 ,<10 0m2 面积林隙物种多样性指数最大 ,而≥ 30 0m2 的林隙则最小 ;>1.5m的林隙物种丰富度指数、Shannon Wienner多样性指数、均匀度指数和均优多指数随发育阶段的变化趋势基本一致 ,均以林隙形成时间为 10～ 2 0年达最大 ,而 <10年的则最小 ;更新层树种平均各林隙内SW多样性指数、均匀度指数和均优多指数以林隙形成 10～ 2 0年为最小 ,至 30年后有所增加 ,4 0～ 5 0年时达最大 ,5 0年后呈缓慢减少趋势。林隙形成为不同树种更新提供了动力 ,林业生产适当培育林隙对物种多样性保护极其重要。The changing pattern of tree species diversities in gaps at different developmental stages of evergreen broad -leaved forest in Mountain Wuyi was analyzed in this paper. The results show that the tree species diversity indexes in gaps are larger than that in non-gap stands, but the ecological dominance shows the opposite discipline. The tree species diversity indexes are changed in expanded gaps of different sizes and reach the highest in those with a size smaller than 100 square meter, but reach the lowest in the expanded gaps with a size larger than 300 square meter. Species richness, species diversity indexes and mean degree indexes of the species higher than 1.5m show a general trend with the development of gaps, reaching the highest level in the gap ages of about 10～20 years, but the lowest level in first ten years. The tree species diversity indexes and mean degree indexes in regeneration layer of gaps are decreased in the first 10 years, reaching the lowest level in 10～20 years after gap formation, and then are increased in the next 30 years, reaching the largest level in 40～50 years, but a slow trend of decreasing after 50 years after gap formation. Gap formation provides the power for regeneration of tree different species. In order to preserve the species diversity, it is very important to make gaps in a proper way in forest production.

关 键 词：武夷山 天然常绿阔叶林 林隙 物种多样性 生态优势度 多样性指数 

分 类 号：S718.54[农业科学—林学]