大相岭自然保护区珙桐群落植物区系、结构及动态  

Flora,structure,and dynamics of Davidia involucrata community in Daxiangling Nature Reserve

作　　者：张潇月 周润惠 余飞燕 叶鑫 王敏 齐锦秋[1,2] 郝建锋 ZHANG Xiao-yue;ZHOU Run-hui;YU Fei-yan;YE Xin;WANG Min;QI Jin-qiu;HAO Jian-feng(College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Wood Industry and Furniture Engineering Sichuan Provincial Colleges and Uni-versities Key Laboratory,Chengdu 611130,China;Key Laboratory of Soil&Water Conservation and Desertification Combating,Chengdu 611130,China)

机构地区：[1]四川农业大学林学院,成都611130 [2]木材工业与家具工程重点实验室,成都611130 [3]水土保持与荒漠化防治重点实验室,成都611130

出　　处：《生态学杂志》2020年第5期1509-1517,共9页Chinese Journal of Ecology

基　　金：国家自然科学基金(31370628);四川省教育厅一般项目(自然科学,15ZB0020);四川农业大学双支计划(03571838)项目资助。

摘　　要：在多次调查的基础上,对四川大相岭自然保护区珙桐(Davidia involucrata)群落的植物区系组成、群落结构、更新现状以及群落演替进行了探究。结果表明:(1)大相岭自然保护区的植被为亚热带向温带过渡的区系类型,大量古老孑遗属的存在反映出珙桐群落植物区系的孑遗性和古老性。(2)群落整体径级结构呈偏正态分布型,高度级结构呈倒J型,群落结构发展趋势较为稳定。(3)大相岭自然保护区珙桐种群整体年龄结构近似呈金字塔型,为增长型种群。总体来说,珙桐纯林(C类型群落)搭配优势度最优,处于后期稳定型演替阶段,是大相岭自然保护区珙桐群落中的顶极群落。研究认为,设立专门的珙桐保护区开展就地保护是针对此类珙桐原生群落有效的保护方法。Based on data from several investigations,we explored flora composition,structure,regeneration status and succession of Davidia involucrata community in Daxiangling Nature Reserve,Sichuan.The results showed that:(1)The vegetation was a transition flora type from subtropical to temperate zone.The co-existence of many ancient genera reflected the ancient and solitary of flora.(2)The diameter-class structure of the community was biased with a normal distribution,and the height-class structure showed an inverted J-shaped curve.The development trend of community structure was relatively stable.(3)The age structure of D.involucrata population was approximately pyramidal,as a growing type.Overall,the pure D.involucrata forest(community type C)was the best in matching dominance and at the late stable succession stage,which was the climax community in Daxiangling Nature Reserve.Our results suggested that establishing a special protection area for in situ conservation of D.involucrata is an effective method for the conservation of native communities.

关 键 词：珙桐 植物区系 群落结构 更新特征 群落演替 

分 类 号：Q948[生物学—植物学]