Diversity of bacterial community in different volcanic sediments of Wudalianchi, China

Abstract:

[Objective] This study was done to understand the diversity of bacteria in the Wudalianchi volcanic region of China. [Methods] High-throughput sequencing with the Illumina MiSeq system was used to analyze the community composition and distribution of the bacteria occurring in different volcanic sediments of the Wudalianchi region. [Results] In total 23 categories of bacteria, including Firmicutes, Proteobacteria, Verrucomicrobia, Acidobacteria, Chloroflexi and Actinobacteria were found and further analyzed. Among them, the abundance of Firmicutes and Proteobacteria were higher, and Bacillus was the predominant genus. In addition, the homology of volcanic materials caused that the metabolic pathways of bacteria were mostly related to the biochemical cycle of C, N, S and Fe, therefore there was a certain degree of similarity between the community structure and function of the bacteria. However due to differences in sedimentary components, environmental factors and geological evolution in different research regions, some populations of Bacillus, Geobacter, Acidobacterium, Gallionella and Blastocatala were distributed differently in volcanic sediments with typical regional adaptability. [Conclusion] It showed that microbial resources were abundant in the volcanic sedimentary environments of the Wudalianchi region. Our results will provide the basic data for the future mining of functional microbial resources and further discussion of the relationship between microbial communities and volcanic environment.