Biogeographical patterns in soil bacterial communities across the Arctic region

Malard, Lucie A.; Anwar, Muhammad Z.; Jacobsen, Carsten S.; Pearce, David A. ORCID: https://orcid.org/0000-0001-5292-4596. 2019 Biogeographical patterns in soil bacterial communities across the Arctic region. FEMS Microbiology Ecology, 95 (9), fiz128. 10.1093/femsec/fiz128

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Text (Open Access) © FEMS 2019. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. fiz128.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (3MB) | Preview

Abstract/Summary

The considerable microbial diversity of soils and key role in biogeochemical cycling have led to growing interest in their global distribution and the impact that environmental change might have at the regional level. In the broadest study of Arctic soil bacterial communities to date, we used high-throughput DNA sequencing to investigate the bacterial diversity from 200 independent Arctic soil samples from 43 sites. We quantified the impact of spatial and environmental factors on bacterial community structure using variation partitioning analysis, illustrating a nonrandom distribution across the region. pH was confirmed as the key environmental driver structuring Arctic soil bacterial communities, while total organic carbon (TOC), moisture and conductivity were shown to have little effect. Specialist taxa were more abundant in acidic and alkaline soils while generalist taxa were more abundant in acidoneutral soils. Of the 48 147 bacterial taxa, a core microbiome composed of only 13 taxa that were ubiquitously distributed and present within 95% of samples was identified, illustrating the high potential for endemism in the region. Overall, our results demonstrate the importance of spatial and edaphic factors on the structure of Arctic soil bacterial communities.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1093/femsec/fiz128
ISSN:	0168-6496
Additional Keywords:	16S rRNA; Arctic soil; microbial diversity; indicator species; core microbiome; biogeography
Date made live:	16 Sep 2019 11:04 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/525110

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