生态学报2017，Vol.37Issue(7)：2352-2359,8.DOI:10.5846/stxb201511192337
环境因子对湖泊岛屿苔藓植物分布和物种组成的影响
Environmental variables affect species composition and distribution of Bryophytes
摘要
Abstract
Bryophytes are sensitivity to the changes in the environment,exhibit high degree of adaptability and ability to reproduce,and play an important role as bioagents in monitoring of the ecological environment and ecological restoration.In the present study,the relationship between species composition and environment variables was elucidated by the canonical correspondence analysis (CCA),regression analysis and Hongfeng river field survey.Partial CCA was used to calculate the gross and net effects on species richness to each environmental variable.The number of bryophytes and composition similarity of species increased along with the increasing area and height of islands (Yejipo,Gantianbian Islandl,Xinzhuang Island1,Hongfeng river islandl,Yuanyang islandl,Yuanyang island2,Hongfeng river island2,Xinzhuang island2 and Ganbiantian island2 with less human disturbance) but declined with increasing island shape index and the closest distance of island from land.Eight environmental variables totally explained 35.6％ of total variation in species composition,of which the net effects of matrix,slope,herbcov,aspect,canopy,human disturbance,moisture and altitude on species composition were significant (P＜0.05),however,the intensity of their effect decreased successively.Eurohypnum leptothallum is the most dominate species with little impact from environment,emerge in 77.7％ of samples and coverage of at least 19.2％.关键词
岛屿/苔藓植物/生态/典范对应分析(CCA)/环境因子Key words
Island/Bryophytes/ecology/CCA/environment factors引用本文复制引用
罗先真,熊源新,夏欣,曹威,钟世梅,崔在宁,谈洪英,刘良淑..环境因子对湖泊岛屿苔藓植物分布和物种组成的影响[J].生态学报,2017,37(7):2352-2359,8.基金项目
国家自然科学基金资助项目(31360041) （31360041）
贵州大学研究生创新基金资助项目(研农2016001) （研农2016001）
