濒危植物合柱金莲木伴生群落特征*
Traits of Concomitant Communities  of the Endangered Plant Sinia rhodoleuca

 

陈宗游,柴胜丰,谭萍,蒋运生,杨丽涛
CHEN Zongyou,CHAI Shengfeng,TAN Ping,JIANG Yunsheng,YANG Litao
 

(1.广西大学农学院,广西南宁 530005;2.广西壮族自治区中国科学院广西植物研究所,广西喀斯特植物保育与恢复生态学重点实验室,广西桂林 541006;3.玉林师范学院,广西玉林  537000;4.广西亚热带生物资源保护利用重点实验室,广西南宁   530005)
(1.College of Agronomy,Guangxi University,Nanning,Guangxi,530005,China;2.Guangxi Key aboratory of Plant Conservation and Restoration Ecology in Karst Terrain,Guangxi Institue of Botany,Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences,Guilin,Guangxi,541006,China;3.Yulin Normal University,Yulin,Guangxi,537000,China;4.Guangxi Key Laboratory of Subtropical Bioresources Conservation and Utilization,Nanning,Guangxi, 530005,China)

摘要:【目的】研究濒危植物合柱金莲木(Sinia rhodoleuca)的伴生群落特征,为该物种的保护提供参考。【方法】采用样地调查法对合柱金莲木的5个分布点:广西融水(P1)、广西金秀(P2)、广西德保(P3)、广东封开(P4)和广东连山(P5)进行调查,分析其伴生群落的种类组成、区系成分、结构特征、物种多样性及其种群年龄结构。【结果】在2000 m2样地中共有维管束植物153种,隶属58科113属,主要优势科为樟科、壳斗科、紫金牛科、茜草科等。合柱金莲木伴生群落种子植物包含12个分布区类型,以泛热带分布、旧世界热带分布、热带亚洲分布为主,热带成分占优势,温带成分所占比例较小。合柱金莲木伴生群落结构分层现象明显,可分为乔木层、灌木层和草本层,层间植物匮乏。与P1、P2、P3样地相比,P4、P5样地生境破坏较小,Shannon指数和Simpson指数高。除P5样地内的合柱金莲木种群为增长型外,其余样地的合柱金莲木种群均为衰退型。【结论】合柱金莲木伴生群落的组成种类丰富,科、属组成复杂,其区系特点具有明显的热带亚热带性质;伴生群落物种多样性与生境破坏程度有关;合柱金莲木种群多呈衰退趋势,应对其加强保护。
关键词:合柱金莲木 濒危植物 伴生群落特征 物种多样性 年龄结构
中图分类号:Q948      文献标识码:A      文章编号:1002-7378(2016)01-0006-09

Abstact:【Objective】To study the traits of concomitant communities characteristics of the endangered
plant Sinia rhodoleuca,and provide references for its conservation strategies.【Methods】The floristic composition,structure,species diversity,and age structure of endangered plantSinia rhodoleuca concomitant communities were studied based on community investigation in five locations (Rongshui (P1),Jinxiu (P2) and Debao (P3) county,Guangxi province;Fengkai (P4) and Lianshan (P5) county,Guangdong province).【Results】There were 153 vascular plants belonging to 58 families and 113 genera in plots of 2000 m2,which dominated by the families of Lauraceae,Fagaceae,Myrsinaceae and Rubiaceae.The floristic composition can be divided into 12 areal types in the level of genera,the pantropic,old world tropics and tropic Asia elements were the dominant areal types,and 79.21% of the genera were the tropical elements,13.1% were the temperate elements.The structure of concomitant communities of the species Sinia rhodoleucacould be vertically divided into three layers:Tree, shrub and herb layer,and interlayer species were deficient.Compared to P1,P2 and P3 plots,the Shannon index and Simpson index were higher in P4 and P5 plots because of their lighter habitat destruction.Analysis on the population age structure of Sinia rhodoleuca indicated that except for the P5 plot, a decline pattern was found in other four investigated plots.【Conclusion】The components of plant species were complex,and there was a obvious tropical and subtropical characteristic of the concomitant community.The species diversity of concomitant community was relevant to the destruction of the habitat. According to the decline tendency of the most populations,a enhanced protection through in situ and ex situconservation should be adopted for the species Sinia rhodoleuca.
Key words:Sinia rhodoleuca,endangered plant,traits of concomitant communities,species diversity,age structure

 

*国家自然科学基金项目(31260086),广西青年科学基金项目(桂科青0832075)和广西植物研究所基本业务费项目(12011)资助。

 

PDF全文下载cbimg.cnki.net/Editor/2016/0214/gxkx/f3dd5a0b-0031-45d9-aa85-7d4448af0319.pdf

发布日期:2016/2/14