摘要
为探讨梵净山自然保护区植物物种多样性与海拔间的梯度格局,以梵净山自然保护区内不同海拔段的植物群落为研究对象,分析23个群落的乔木、灌木、草本层的物种组成、物种多样性、植物区系成分等与海拔梯度间的关系。研究结果表明:1)在23个群落中记录到维管植物64科146属272种;物种丰富度指数在中间海拔(1000~2000 m)达到最大值211种,符合典型的中间膨胀原理。2)乔木层和灌木层Shannon-Wiener指数(H)的变化格局是先升后降的趋势,草本层呈先降低后升高再下降的变化格局;各层Simpson优势度(D)和Pielou均匀度(J)在中低海拔地区没有明显的变化趋势,而在高海拔地区显著降低。3)乔木层的常绿阔叶生活型随海拔的升高后逐渐减少,而落叶阔叶生活型和常绿针叶生活型在海拔升高的影响下逐渐增加。4)随着海拔升高,热带亚热带植物区系成分逐渐减少,而温带成分逐渐增加并在高海拔地段占据主导地位。
In order to explore the gradient pattern of plant species diversity and elevation in Fanjing Mountain Nature Reserve,the paper takes Fanjing Mountain Nature Reserve as the research sample site.The relationship between the species composition,species diversity,and flora composition of the trees,shrubs,and herb layer and the altitude gradient of the 23 communities was analyzed.The study results showed that:1)There were 272 species in 146 genera of 64 families in 23 communities;the maximum species richness index reached 211 species at intermediate altitude(1000~2000 m),consistent with the typical intermediate expansion principle.2)The change pattern of Shannon-Wiener index(H)in arbor and shrub layer was the trend of first rising and then decreasing,while the herbaceous layer showed the change pattern of first decreasing,then increasing and then decreasing.Each layer Simpson Dominance(D)and Pielou evenness(J)showed no obvious trend in the middle and low elevations,but it decreased significantly in the high elevations.3)The evergreen broad-leaved life type gradually decreased after the elevation level,while the deciduous broad-leaved life type and evergreen coniferous life type gradually increased.4)With the elevation,tropical and subtropical flora composition gradually decreased,while temperate composition gradually increased and occupied a dominant position in high-altitude areas.
作者
曾珍
容丽
杨文松
李璇
林朝平
ZENG Zhen;RONG Li;YANG Wensong;LI Xuan;LIN Chaoping(School of Geography&Environmental Sciences,Guizhou Normal University,Guiyang,Guizhou 550025,China)
出处
《贵州师范大学学报（自然科学版）》
CAS
北大核心
2024年第1期27-35,共9页
Journal of Guizhou Normal University：Natural Sciences
基金
国家世界遗产申报与保护项目(20140505)
贵州省科技计划重点课题(黔科合SY[2016]3052号)。
关键词
梵净山
物种多样性
海拔梯度
分布格局
植物区系
Fanjing Mountain
species diversity
altitudinal gradient
distribution pattern
flora
