生态学杂志2011，Vol.30Issue(2)：208-214,7.
三峡水库消落带植物群落组成及物种多样性
Floristic composition and species diversity of plant communities along an environment gradient in drawdown area of Three Gorges Reservoir after its initial impounding to the water level of 156 m
摘要
Abstract
Aimed to provide scientific basis for understanding and maintaining the biodiversity in water level fluctuation littoral zone, the Kaixian reach of Pengxihe River was chosen to study the spatial pattern and gradient variation of plant communities in the drawdown area of Three Gorges Reservoir. In the study area, there was an obvious variation in the kind and dominance of dominant and companion species in each plant community. With increasing elevation, the total species richness decreased after an initial increase, and α- and β-diversity had a greater fluctuation,among which, Shannon diversity and Simpson diversity showed a distribution of "M" and "W" types, respectively, while Pielou diversity showed the same variation pattern with species richness. Jaccard index and Cody index all increased after an initial decrease, with the lowest values at middle elevation and the highest values at higher elevation. It was considered that the variation of α-diversity in the study area was originated from the habitat difference induced by the difference in the flooding time caused by different elevation, while the reason of β-diversity change was more complicated, which should be further studied.关键词
生物多样性/消落带/高程梯度/澎溪河分类
生物科学引用本文复制引用
孙荣,袁兴中,刘红,陈忠礼,张跃伟..三峡水库消落带植物群落组成及物种多样性[J].生态学杂志,2011,30(2):208-214,7.基金项目
国家自然科学基金项目(50749045)、国家科技支撑计划项目(2006BAJ08B01)和重庆市科委科技攻关项目(CSTC,2009AB1079)资助. （50749045）
