Landscape topography structures the soil microbiome in arctic polygonal tundra
Abstract
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.
- Authors:
-
[1];
[2];
- 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)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1423412
- Alternate Identifier(s):
- OSTI ID: 1433134
- Report Number(s):
- PNNL-SA-126595
Journal ID: ISSN 2041-1723
- Grant/Contract Number:
- AC05-76RL01830; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; soil microbiome; metagenome; polygonal tundra; greenhouse gas
Citation Formats
Taş, Neslihan, Prestat, Emmanuel, Wang, Shi, Wu, Yuxin, Ulrich, Craig, Kneafsey, Timothy, Tringe, Susannah G., Torn, Margaret S., Hubbard, Susan S., and Jansson, Janet K. Landscape topography structures the soil microbiome in arctic polygonal tundra. United States: N. p., 2018.
Web. doi:10.1038/s41467-018-03089-z.
Taş, Neslihan, Prestat, Emmanuel, Wang, Shi, Wu, Yuxin, Ulrich, Craig, Kneafsey, Timothy, Tringe, Susannah G., Torn, Margaret S., Hubbard, Susan S., & Jansson, Janet K. Landscape topography structures the soil microbiome in arctic polygonal tundra. United States. https://doi.org/10.1038/s41467-018-03089-z
Taş, Neslihan, Prestat, Emmanuel, Wang, Shi, Wu, Yuxin, Ulrich, Craig, Kneafsey, Timothy, Tringe, Susannah G., Torn, Margaret S., Hubbard, Susan S., and Jansson, Janet K. Thu .
"Landscape topography structures the soil microbiome in arctic polygonal tundra". United States. https://doi.org/10.1038/s41467-018-03089-z. https://www.osti.gov/servlets/purl/1423412.
@article{osti_1423412,
title = {Landscape topography structures the soil microbiome in arctic polygonal tundra},
author = {Taş, Neslihan and Prestat, Emmanuel and Wang, Shi and Wu, Yuxin and Ulrich, Craig and Kneafsey, Timothy and Tringe, Susannah G. and Torn, Margaret S. and Hubbard, Susan S. and Jansson, Janet K.},
abstractNote = {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.},
doi = {10.1038/s41467-018-03089-z},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Thu Feb 22 00:00:00 EST 2018},
month = {Thu Feb 22 00:00:00 EST 2018}
}
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