峨眉山珍稀濒危植物珙桐群落特征研究  

Study on Community Characteristics of Endangered Davidia Involucrata Species in Mount Emei

作　　者：陈绪玲 余道平 方志强[1,2] 李小杰 李策宏[1] 谢孔平 CHEN Xuling;YU Daoping;FANG Zhiqiang;LI Xiaojie;LI Cehong;XIE Kongping(Emei Mountain Biotic Resource Experimental Station,Emeishan 614201,China;Sichuan Provincial Institute of Natural Resource Science,Chengdu 610015,China)

机构地区：[1]峨眉山生物资源实验站,四川峨眉山614200 [2]四川省自然资源科学研究院,四川成都610015

出　　处：《四川林业科技》2021年第2期21-26,共6页Journal of Sichuan Forestry Science and Technology

基　　金：峨眉山3种濒危植物野生种群自然更新能力评估与人工促进措施研究(2019YFS0459);四川省植物资源共享平台建设项目(2019JDPT0028);峨眉山植物园科普教育基地能力提升创新与示范(2018KZ0006)。

摘　　要：采用样地调查法,在峨眉山海拔1500~1800 m的珙桐分布区内对珙桐群落进行野外调查,设置5个样地,总面积共2000 m~2,重点调查该区域内珙桐的群落结构、年龄结构和垂直分布状况,此次调查结果表明:(1)珙桐的分布区域中群落植物种类丰富,有高等植物147种,分属于68科,102属;其生活型以高位芽植物占绝对优势,达40.5%,以中叶(53%)、单叶(79.5%)、纸质叶(77%)为主;乔木层重要值分析显示,珙桐在群落中的优势度最高;(2)珙桐种群中,中龄级的个体数量较多,幼龄个体和老龄个体数量较少,呈纺锤形结构,为衰退型种群;(3)从垂直分布看,海拔最高的仙峰寺,成年个体和实生苗数量最多。In this study,a field investigation was conducted in the distribution area of Davidia involucrata community at an altitude of 1500-1800 m in Mount Emei.Five sample plots with a total area of 2000 m2 were set up,focusing on community structure,age structure and vertical distribution of Davidia involucrate in this area.The results showed that:(1)There are 147 species of higher plant species in Davidia involucrate community,belonging to 68 families and 102 genera.The life form of the community is dominated by phanerophyte(40.5%),leave size by mesophyll(53%),leave type by single leaf(79.5%),and leaf texture by papery(77%).The analysis of important value of tree layer showed that Davidia involucrata had the highest dominance in the community.(2)In Davidia involucrata population,the number of middle-aged individuals was more,while the number of young and old individuals was less,showing spindle-shaped structure.The results indicated that the population was declining.(3)According to the vertical distribution,Xianfeng Temple with the highest elevation had the largest number of adult individuals and seedlings.

关 键 词：峨眉山 珙桐群落 垂直分布 年龄结构 

分 类 号：S792.99[农业科学—林木遗传育种]