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    Microbial Communities in a High Arctic Polar Desert Landscape

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    McCann_2016.pdf (619.4Kb)
    Issue Date
    2016-03
    Author
    McCann, Clare M.
    Wade, Matthew J.
    Gray, Neil D.
    Roberts, Jennifer A.
    Hubert, Casey R. J.
    Graham, David W.
    Publisher
    Frontiers Media
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    The High Arctic is dominated by polar desert habitats whose microbial communities are poorly understood. In this study, we used next generation sequencing to describe the α- and β-diversity of microbial communities in polar desert soils from the Kongsfjorden region of Svalbard. Ten phyla dominated the soils and accounted for 95% of all sequences, with the Proteobacteria, Actinobacteria, and Chloroflexi being the major lineages. In contrast to previous investigations of Arctic soils, relative Acidobacterial abundances were found to be very low as were the Archaea throughout the Kongsfjorden polar desert landscape. Lower Acidobacterial abundances were attributed to characteristic circumneutral soil pHs in this region, which has resulted from the weathering of underlying carbonate bedrock. In addition, we compared previously measured geochemical conditions as possible controls on soil microbial communities. Phosphorus, pH, nitrogen, and calcium levels all significantly correlated with β-diversity, indicating landscape-scale lithological control of available nutrients, which in turn, significantly influenced soil community composition. In addition, soil phosphorus and pH significantly correlated with α-diversity, particularly with the Shannon diversity and Chao 1 richness indices.
    URI
    http://hdl.handle.net/1808/20780
    DOI
    https://doi.org/10.3389/fmicb.2016.00419
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    • Geology Scholarly Works [247]
    Citation
    Mccann, Clare M., Matthew J. Wade, Neil D. Gray, Jennifer A. Roberts, Casey R. J. Hubert, and David W. Graham. "Microbial Communities in a High Arctic Polar Desert Landscape." Front. Microbiol. Frontiers in Microbiology 7 (2016): n. pag. Web.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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