title: Diversity and Composition of Bacterial Community in Soils and Lake Sediments from an Arctic Lake Area.
abstract: 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 were identified by high-throughput sequencing, targeting bacterial 16S rRNA gene. 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, Chloroflexi, 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, Rhodococcus, 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 ([Formula: see text]-N, p < 0.01), silicate silicon ([Formula: see text]-Si, p < 0.01), nitrite nitrogen ([Formula: see text]-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.
authors: Key Lab of Marine Bioactive Substances, First Institute of Oceanography, State Oceanic Administration Qingdao, China.
authors: Neng Fei
authors: NF
authors: Wang
authors: Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences Beijing, China.
authors: Tao
authors: T
authors: Zhang
authors: Chemical Engineering Institute, Qingdao University Qingdao, China.
authors: Xiao
authors: X
authors: Yang
authors: Chemical Engineering Institute, Qingdao University Qingdao, China.
authors: Shuang
authors: S
authors: Wang
authors: Polar Research Institute of China Shanghai, China.
authors: Yong
authors: Y
authors: Yu
authors: Department of Bioengineering and Biotechnology, Qingdao University of Science and Technology Qingdao, China.
authors: Long Long
authors: LL
authors: Dong
authors: Department of Bioengineering and Biotechnology, Qingdao University of Science and Technology Qingdao, China.
authors: Yu Dong
authors: YD
authors: Guo
authors: Key Lab of Marine Bioactive Substances, First Institute of Oceanography, State Oceanic Administration Qingdao, China.
authors: Yong Xing
authors: YX
authors: Ma
authors: Key Lab of Marine Bioactive Substances, First Institute of Oceanography, State Oceanic Administration Qingdao, China.
authors: Jia Ye
authors: JY
authors: Zang
keywords: Arctic lake area; bacterial diversity and community composition; geochemical factor; high-throughput sequencing; soils and lake sediments