Bacterial communities in sediments of the shallow Lake Dongping in China
Article first published online: 24 NOV 2011
© 2011 The Authors. Journal of Applied Microbiology © 2011 The Society for Applied Microbiology
Journal of Applied Microbiology
Volume 112, Issue 1, pages 79–89, January 2012
How to Cite
Song, H., Li, Z., Du, B., Wang, G. and Ding, Y. (2012), Bacterial communities in sediments of the shallow Lake Dongping in China. Journal of Applied Microbiology, 112: 79–89. doi: 10.1111/j.1365-2672.2011.05187.x
- Issue published online: 13 DEC 2011
- Article first published online: 24 NOV 2011
- Accepted manuscript online: 2 NOV 2011 04:32AM EST
- 2011/0969: received 11 June 2011, revised 4 October 2011 and accepted 27 October 2011
- bacterial communities;
- Lake Dongping;
Aims: The purpose of this study was to discuss how the environmental inputs and anthropogenic activities impact bacterial communities in the sediments of a shallow, eutrophic and temperate freshwater lake.
Methods and Results: Sediment cores were collected from Lake Dongping, located in Taian, Shandong, China. All samples were processed within 4 h of collection. Total nitrogen, total phosphorus (TP), total organic carbon, ammonium nitrogen and nitrate nitrogen content of samples were measured by Kjeldahl determination, sulphuric acid–perchloric acid digestion and molybdenum blue colorimetry, potassium dichromate titration, Nessler’s reagent colorimetric and the phenol disulphonic acid colorimetric method, respectively. Seasonal and temporal diversity of sediment bacterial communities at six stations in Lake Dongping were investigated using molecular approaches (terminal restriction fragment length polymorphism and 16S rDNA clone libraries). Noticeable seasonal and temporal variations were observed in bacterial diversity and composition at all six stations. Sediment bacterial communities in Lake Dongping belonged to 16 phyla: Proteobacteria (including α-Proteobacteria, β-Proteobacteria, δ-Proteobacteria, ε-Proteobacteria, γ-Proteobacteria), Acidobacteria, Planctomycetes, Bacteroidetes, Firmicutes, Verrucomicrobia, Nitrospira, Chloroflexi, Gemmatimonadetes, Chlorobi, Cyanobacteria, Deferribacteres, Actinobacteria, OP8, Spirochaetes and OP11. Members of β-, δ- and γ-Proteobacterial sequences were predominant in 11 of 12 clone libraries derived from sediment samples. Sediment samples collected at stations 1 and 4 in July had the greatest bacterial diversity while those collected at station 2 in October had the least diversity. TP concentration was significantly correlated with the distribution of bacterial communities.
Conclusions: Our results suggested that different environmental nutrient inputs contribute to seasonal and temporal variations of chemical features and bacterial communities in sediments of Lake Dongping. TP concentration was significantly correlated with the distribution of bacterial communities.
Significance and Impact of the Study: This study has an important implication for the optimization of integrated ecosystem assessment of shallow temperate freshwater lake and provides interesting information for the subsequent of the ecosystem.