title: Identification of bacterial communities in sediments of Poyang Lake, the largest freshwater lake in China.
abstract: Bacteria play a vital role in various biogeochemical processes in lacustrine sediment ecosystems. This study is among the first to investigate the spatial distribution patterns of bacterial community composition in the sediments of Poyang Lake, the largest freshwater lake of China. Sediment samples were collected from the main basins and mouths of major rivers that discharge into the Poyang Lake in May 2011. Quantitative PCR assay and pyrosequencing analysis of 16S rRNA genes showed that the bacteria community abundance and compositions of Poyang Lake sediment varied largely among sampling sites. A total of 25 phyla and 68 bacterial orders were distinguished. Burkholderiales, Gallionellales (Beta-proteobacteria), Myxococcales, Desulfuromonadales (Delta-proteobacteria), Sphingobacteriales (Bacteroidetes), Nitrospirales (Nitrospirae), Xanthomonadales (Gamma-proteobacteria) were identified as the major taxa and collectively accounted for over half of annotated sequences. Moreover, correlation analyses suggested that higher loads of total phosphorus and heavy metals (copper, zinc and cadmium) could enhance bacterial abundance in the sediment.
authors.affiliation: College of Life Science, Nanchang University, No. 999, Xuefu da Road, Hongutang New District, Nanchang, 300031 Jiangxi China ; Collaborative Innovation Center for Poyang Lake Basin Green Development and Water Security, Nanchang University, Nanchang, 330031 China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Kou
authors.affiliation: College of Life Science, Nanchang University, No. 999, Xuefu da Road, Hongutang New District, Nanchang, 300031 Jiangxi China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Biological Sciences, Kent State University, No. 800 E. Summit Street, Kent, OH 44240 USA.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Lu
authors.affiliation: College of Life Science, Nanchang University, No. 999, Xuefu da Road, Hongutang New District, Nanchang, 300031 Jiangxi China ; Collaborative Innovation Center for Poyang Lake Basin Green Development and Water Security, Nanchang University, Nanchang, 330031 China.
authors.forename: Yantian
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Biological Sciences, Kent State University, No. 800 E. Summit Street, Kent, OH 44240 USA.
authors.forename: Xiaozhen
authors.initials: X
authors.lastname: Mou
authors.affiliation: College of Life Science, Nanchang University, No. 999, Xuefu da Road, Hongutang New District, Nanchang, 300031 Jiangxi China ; Collaborative Innovation Center for Poyang Lake Basin Green Development and Water Security, Nanchang University, Nanchang, 330031 China.
authors.forename: Lan
authors.initials: L
authors.lastname: Wu
keywords: Bacterial community; High-throughput sequencing; Poyang Lake; Sediment