三峡水库消落带植物物种组成及群落物种多样性研究  

Species Composition and Species Diversity of Plant Community in the Water-lever-fluctuation Zone of Three Gorges Reservoir

作　　者：齐代华[1] 贺丽[1] 周旭[1] 刘成[1] 闵鹏[1] 

机构地区：[1]三峡库区生态环境教育部重点实验室重庆市三峡库区植物生态与资源重点实验室西南大学生命科学学院,重庆北碚400715

出　　处：《草地学报》2014年第5期966-970,共5页Acta Agrestia Sinica

基　　金：中央高校基本科研业务费专项资金(XDJK2010E001)资助

摘　　要：以三峡库区典型区域的消落带植物群落为研究对象,通过对区域内5个不同海拔段的植物群落进行样方调查,采用α多样性指数及β多样性指数进行测度,探讨该区消落带水淹梯度上的物种组成、多样性变化规律。结果表明:共有298种维管植物,隶属于82科175属,种类较少;优势种组成变化明显,Shannon-Wiener指数、Simpson指数和物种丰富度指数总体均表现为随海拔升高而升高,均匀度指数则表现为先降低后升高的趋势;β_T与C_N随海拔升高呈基本相反的变化趋势。Plant communities in the water-lever-fluctuation zone of Three Gorges Reservoir were studied.The study area was divided into five regions according to the changes of water level.The species diversities and gradient variation of plant communities in the water-lever-fluctuation zone of Three Gorges Reservoir were measured by α-diversity index and β-diversity index.The results showed that there were the 298 species of vascular plants belonging to 82 families and 175 genera in all plots.Dominant species had obvious difference among different regions in the study area.The Shannon-Wiener,Simpson and richness indices of the communities generally increased with the altitude increasing,while Pielou diversity showed different variation pattern from the richness index,and βTand CNdiversity index presented opposite trend.

关 键 词：三峡水库 消落带 Α多样性 Β多样性 

分 类 号：Q948.1[生物学—植物学]