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.
作者
陈绪玲
余道平
方志强
李小杰
李策宏
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)
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)。
关键词
峨眉山
珙桐群落
垂直分布
年龄结构
Mount Emei
Davidia involucrata community
Vertical distribution
Age structure
