Spatial change of bacterial community in high-altitude freshwater wetland sediment

Liu Y, Zhang JX, Zhang XL, Xie SG*. 2014. Spatial change of bacterial community in high-altitude freshwater wetland sediment. Limnology, DOI: 10.1007/s10201-014-0429-0.

Abstract: Sediment microorganisms play crucial role in a variety of biogeochemical processes in freshwater ecosystems. The objective of the current study was to investigate the spatial change of sediment bacterial community structure in Luoshijiang Wetland, located in Yunnan-Kweichow Plateau (China). Wetland sediments at different sites and depths were collected. Clone library analysis indicates bacterial communities varied with both sampling site and sediment depth. A total of fourteen bacterial phyla were identified in sediment samples, including Proteobacteria, Acidobacteria, Actinobacteria, Armatimonadetes, Bacteroidetes, Chlorobi, Chloroflexi, Cyanobacteria, Firmicutes, Gemmatimonadetes, Nitrospirae, Planctomycetes, Spirochaetes, and Verrucomicrobia. Proteobacteria (mainly Betaproteobacteria and Deltaproteobacteria) predominated in wetland sediments. Moreover, the proportions of Alphaproteobacteria, Acidobacteria, Bacteroidetes, Gemmatimonadete, and Planctomycetes were significantly correlated with chemical properties.

Keywords: Aquatic ecosystem; Microbial community; Proteobacteria; Wetlands; Sediment; Freshwater