四川白河自然保护区水青树群落特征与种群更新  

Community Characteristics and Population Regeneration of Tetracentron sinense in Baihe Nature Reserve,Sichuan Province

作　　者：王鑫 刘祥东 冯超 黄琴 任亦钊 沈丽 李晓清[1] WANG Xin;LIU Xiangdong;FENG Chao;HUANG Qin;REN Yizhao;SHEN Li;LI Xiaoqing(Sichuan Academy of Forestry,Sichuan Key Laboratory of E cological Restoration and Conservation for Forest and Wetland,Chengdu 610081,Sichuan,China;Chengdu Uni versity of Information Technology,Chengdu 610225,Sichuan,China)

机构地区：[1]四川省林业科学研究院、森林和湿地生态恢复与保育四川省重点实验室,四川成都610081 [2]成都信息工程大学,四川成都610225

出　　处：《福建林业科技》2023年第2期1-6,12,共7页Journal of Fujian Forestry Science and Technology

基　　金：四川省林业科学研究院基本科研项目(2021JBKY09)。

摘　　要：于2021年6—10月,以四川白河国家级自然保护区内的水青树为研究对象,采取样线法和样方法,对其群落结构、物种组成、种群径级结构及种群更新特点进行调查研究。结果表明:水青树伴生维管植物共记录有69科120属144种,白桦(Betula platyphylla)、糙皮桦(Betula utilis)、连香树(Cercidiphyllum japonicum)为群落优势种,蔷薇科(Rosaceae)、荨麻科(Urticaceae)、百合科(Liliaceae)、唇形科(Labiatae)、桦木科(Betulaceae)等为群落伴生植物的主要组成科;水青树群落的草本层物种最为丰富,其丰富度指数、多样性指数均最大,而乔木层的丰富度指数、多样性指数均较低;总体来看水青树种群年龄结构类型为增长型向稳定型过渡,种群数量少,林下更新极度不良,且各样地中水青树径级分布出现不同程度的残缺现象,表现出林窗或林缘下更新的特点,水青树群落在朝着不利于水青树种群更新的方向发展;保护区内水青树的垂直分布表现出对低于2600 m海拔段的明显偏好。From June to October 2021,a survey was conducted on the community structure,species composition,population size class structure,and population renewal characteristics of Tetracentron sinense in the Baihe National Nature Reserve in Sichuan,China,using line sampling and sampling methods.The results show that 144 species belonging to 120 genera and 69 families of vascular plants associated with Tetracentron sinense,Betula platyphylla,Betula utilis and Cercidiphyllum japonicum are the dominant species of the community,and Rosaceae,Urticaceae,Liliaceae,Labiatae and Betulaceae are the main constituent families of the associated plants of the community.The species of herbaceous layer of Tetracentron sinense community are the most abundant,and its richness index and diversity index are the largest,while the richness index and diversity index of arbor layer are low.On the whole,the age structure of the population of Tetracentron sinense is a transition from stable type to declining type,with a small number of populations,extremely poor regeneration under the forest,and the diameter class distribution of Tetracentron sinense in various fields is incomplete to varying degrees,mostly middle-aged and elderly individuals,showing the characteristics of newer under the forest gap or forest edge.In the study area,the development of Tetracentron sinense community is not conducive to the regeneration of Tetracentron sinense population.The vertical distribution of the Tetracentron sinense in the reserve shows an obvious preference for the altitude below 2600 m.

关 键 词：水青树 群落特征 种群更新 四川白河国家级自然保护区 

分 类 号：S718.542[农业科学—林学]