滇东北珙桐群落结构特征研究  

Study on Characteristics of Community Structure of Davidia involucrata in Northeastern Yunnan

作　　者：罗柏青[1] 杜凡[1] 王娟[1] 石翠玉[1] 赫尚丽[1] 

机构地区：[1]西南林学院,云南昆明650224

出　　处：《林业调查规划》2009年第1期15-20,共6页Forest Inventory and Planning

基　　金：云南昭通北部自然保护区综合科学考察项目(09968-206613;云南省林业厅项目);自然保护区生物标本标准化整理;整合及共享试点(2005DKA21404;国家科技基础条件平台建设项目)

摘　　要：在对滇东北9个样地总面积4500 m2珙桐群落进行野外调查的基础上,重点分析该地区珙桐群落的物种构成、区系成分、结构特征、群落相似性及珙桐更新状况.结果表明:①该地区珙桐群落植物种类十分丰富,共有蕨类植物7科10属16种,被子植物63科110属171种,且古老性、特有性强;②群落被子植物的区系构成中以温带分布型属为主,约占57.27%,缺乏温带亚洲分布,中亚分布和地中海区、西亚至中亚分布3种类型;③与四川省都江堰、卧龙和甘肃省文县等地珙桐群落植物区系构成基本相似,但温带成分略为减少,热带成分相对较多;④群落垂直结构明显,珙桐与各散生竹类构成独特的乔、竹、草结构,依群落中灌木层优势竹种不同而划分为3个群丛;⑤珙桐径级分布呈现出稳定增长的金字塔型,表明该地区珙桐种群能保持较长时期稳定,但珙桐更新种群以萌枝为主,极少见实生苗,表现出种群衰退迹象,而且群落更新层中有大量其他树种幼苗,若珙桐遭到破坏,它们将有可能取代珙桐的优势地位.Based on field work in 9 sample plots of Davidia involucrata communities with total area of 4 500 m^2 in Northeastern Yunnan, the study mainly analyzes the species composition, flora element, structure characteristics, similarity about community and species regeneration. The results show as following： （1） The species of the community are very rich with prominent ancient and endemic characteristics. There totally are 16 species of Pteridophyte, belonging to 10 genera and 7 families, and 171 species of seed plants, to 110 genera and 63 families. （2） The flora composition of angiosperm is mainly temperate distribution type accounting for about 57.27%. （3） The flora composition of the population is basically same as that in other provinces. （4） The vertical structure of the community is obvious. （5） The diameter class distribution of Davidia involucrata population presents stable growth like a pyramid.

关 键 词：珙桐群落 区系特征 群落结构 滇东北 

分 类 号：S792.99[农业科学—林木遗传育种] S718.54[农业科学—林学]