Diversity and composition of bacterial community in soils and lake sediments from an Arctic lake area

• Published in: Frontiers in Microbiology
• Main Authors: Nengfei Wang, Tao Zhang, Xiao Yang, Shuang Wang, Yong Yu, Long Long Dong, Yu Dong Guo, Yong Xing Ma, Jia Ye Zang
• Format: Article in Journal/Newspaper
• Language: English
• Published: Frontiers Media S.A. 2016
• Subjects: high-throughput sequencing; Geochemical factor; Bacterial diversity and community composition; Arctic lake area; Soils and lake sediments; Microbiology; QR1-502; Arctic; Arctic Lake; Svalbard
• Online Access: https://doi.org/10.3389/fmicb.2016.01170; https://doaj.org/article/34e3933033aa408bace19b000cc3f82e

This study assessed the diversity and composition of bacterial communities within soils and lake sediments from an Arctic lake area (London Island, Svalbard). A total of 2,987 operational taxonomic units (OTUs) were identified by high throughput sequencing, targeting bacterial 16S rRNA. The samples from four sites (three samples in each site) were significantly different in geochemical properties and bacterial community composition. Proteobacteria and Acidobacteria were abundant phyla in the nine soil samples, whereas Proteobacteria and Bacteroidetes were abundant phyla in the three sediment samples. Furthermore, Actinobacteria, Chlorobi, Chlorofiexi, Elusimicrobia, Firmicutes, Gemmatimonadetes, Nitrospirae, Planctomycetes, Proteobacteria significantly varied in their abundance among the four sampling sites. Additionally, members of the dominant genera, such as Clostridium, Luteolibacter, Methylibium, Rhodococus, and Rhodoplanes, were significantly different in their abundance among the four sampling sites. Besides, distance-based redundancy analysis revealed that pH (p < 0.001), water content (p < 0.01), ammonium nitrogen (NH4--N, p < 0.01), silicate silicon (SiO42--Si, p < 0.01), nitrite nitrogen (NO2--N, p < 0.05), organic carbon (p < 0.05), and organic nitrogen (p < 0.05) were the most significant factors that correlated with the bacterial community composition. The results suggest soils and sediments from a lake area in the Arctic harbor a high diversity of bacterial communities, which are influenced by many geochemical factors of Arctic environments.