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Abstract

Based on 16S rRNA gene analyses, the same bacterial operational taxonomic units (OTUs) are common to both the Arctic and Antarctic oceans, supporting the concept everything is everywhere. However, whether the same OTUs from both poles have identical genomes, i.e. whether everything is still everywhere at the genomic level has not yet been examined systematically. Here, we isolated, sequenced and compared the genomes of 45 culturable marine bacteria belonging to three genera of Salinibacterium, Psychrobacter and Pseudoalteromonas from both polar oceans. The bacterial strains with identical 16S rRNA genes were common to both poles in every genus, and four identical genomes were detected in the genus Salinibacterium from the Arctic region. However, no identical genomes were observed from opposite poles in this study. Our data, therefore, suggest that everything is not everywhere at the genomic level. The divergence time between bacteria is hypothesized to exert a strong impact on the bacterial biogeography at the genomic level. The geographical isolation between poles was observed for recently diverged, highly similar genomes, but not for moderately similar genomes. This study thus improves our understanding of the factors affecting the genomic-level biogeography of marine microorganisms isolated from distant locations.

Item Type:	Article
Authors/Creators:	Qin, Q-L and Wang, Z-B and Cha, Q-Q and Liu, S-S and Ren, X-B and Fu, H-H and Sun, M-L and Zhao, D-L and McMinn, A and Chen, Y and Chen, X-L and Zhang, Y-Z and Li, P-Y
Keywords:	bacteria, culturable, biogeography
Journal or Publication Title:	Environmental Microbiology
Publisher:	Blackwell Publishing Ltd
ISSN:	1462-2912
DOI / ID Number:	10.1111/1462-2920.15870
Copyright Information:	© 2021 Society for Applied Microbiology and John Wiley & Sons Ltd.
Related URLs:	Google Scholar: McMinn, A UTAS Profile: McMinn, A
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