Landscape topography structures the soil microbiome in arctic polygonal tundra

Taş, Neslihan; Prestat, Emmanuel; Wang, Shi; Wu, Yuxin; Ulrich, Craig; Kneafsey, Timothy; Tringe, Susannah G.; Torn, Margaret S.; Hubbard, Susan S.; Jansson, Janet K.

doi:10.1038/s41467-018-03089-z

Title: Landscape topography structures the soil microbiome in arctic polygonal tundra

Journal Article · Thu Feb 22 00:00:00 EST 2018 · Nature Communications

DOI:https://doi.org/10.1038/s41467-018-03089-z· OSTI ID:1423412

Taş, Neslihan ^[1]; Prestat, Emmanuel ^[1];

^[1]; Wu, Yuxin ^[1]; Ulrich, Craig ^[1]; Kneafsey, Timothy ^[1];

^[2]; Torn, Margaret S. ^[3]; Hubbard, Susan S. ^[1]; Jansson, Janet K. ^[4]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

In the Arctic, environmental factors governing microbial degradation of soil carbon (C) in active layer and permafrost are poorly understood. Here we determined the functional potential of soil microbiomes horizontally and vertically across a cryoperturbed polygonal landscape in Alaska. With comparative metagenomics, genome binning of novel microbes, and gas flux measurements we show that microbial greenhouse gas (GHG) production is strongly correlated to landscape topography. Active layer and permafrost harbor contrasting microbiomes, with increasing amounts of Actinobacteria correlating with decreasing soil C in permafrost. While microbial functions such as fermentation and methanogenesis were dominant in wetter polygons, in drier polygons genes for C mineralization and CH 4 oxidation were abundant. The active layer microbiome was poised to assimilate N and not to release N 2 O, reflecting low N 2 O flux measurements. These results provide mechanistic links of microbial metabolism to GHG fluxes that are needed for the refinement of model predictions.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC05-76RL01830; AC02-05CH11231

OSTI ID:: 1423412

Alternate ID(s):: OSTI ID: 1433134

Report Number(s):: PNNL-SA-126595

Journal Information:: Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 58 works

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54 ENVIRONMENTAL SCIENCES
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Title: Landscape topography structures the soil microbiome in arctic polygonal tundra

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