Spatial-temporal Dynamics of Vegetation in the Newly Created Water-level-fluctuation Zone of Three Gorges Reservoir:a Case Study in Baijia Stream, Kaixian County, China
After impoundent of the Three Gorges Reservoir, a large permanent sample plot was placed in its water-level-fluctuation zone beside Baijia Stream, Kaixian County, China. Vegetation in the plot was investigated in the summer of 2008, 2009 and 2010. The result indicated that community s component, biodiversity and aboveground biomass showed obvious spatial-temporal dynamics. Total spiecies number of vascular flora inside decreased yearly, from 52 species in 2008 to 41 species in 2009 and to 35 species in 2010. The area below 156 m in elevation was dominated by Paspalum paspaloides and Xanthium sibiricum in 2008. However, Paspalum paspaloides was rapid replaced by Cyrwdon dactylo in 2009 and X. sibiri-cum expanded its distribution in upper area of the plot. In 2010, X. sibiricum depressed its population in lower areas of the plot as the Three Gorges Reservoir started to impound half month earlier in the winter of 2009 and decreased seed bank for its germination. Shannon-Wiener Index increased as elevation according to the data of 2009 and 2010, which reflected the influence of submerged gradient. Aboveground biomass of vegetation in each elevation zone of the plot indicated great variation.
Three Gorges Reservoir water-level-fluctuation zone vegetation spatial-temporal dynamics biodiversity
WANG Qiang LIU Hong ZHANG Yue-wei XIONG Sen YUAN Xing-zhong
College of Resource and Environmental Science Key Laboratory of Southwest Resource Exploitation and College of Resource and Environmental Science Pengxi River Wetland Nature Reserve Management Bureau, Kaixian Chongqing 405400, China
国际会议
重庆
英文
163-167
2011-10-01（万方平台首次上网日期，不代表论文的发表时间）