Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment
Abstract
Microbial decomposition of soil organic carbon (SOC) in thawing Arctic permafrost is important in determining greenhouse gas feedbacks of tundra ecosystems to climate. However, the changes in microbial community structure during SOC decomposition are poorly known. Here we examine these changes using frozen soils from Barrow, Alaska, USA, in anoxic microcosm incubation at -2 and 8°C for 122 days. The functional gene array GeoChip was used to determine microbial community structure and the functional genes associated with SOC degradation, methanogenesis, and Fe(III) reduction. Results show that soil incubation after 122 days at 8°C significantly decreased functional gene abundance (P < 0.05) associated with SOC degradation, fermentation, methanogenesis, and iron cycling, particularly in organic-rich soil. These observations correspond well with decreases in labile SOC content (e.g., reducing sugar and ethanol), methane and CO 2 production, and Fe(III) reduction. In contrast, the community functional structure was largely unchanged in the -2°C incubation. Soil type (i.e., organic vs. mineral) and the availability of labile SOC were among the most significant factors impacting microbial community structure. These results demonstrate the important roles of microbial community in SOC degradation and support previous findings that SOC in organic-rich Arctic tundra is highly vulnerable to microbial degradationmore »
- Authors:
-
[1];
[7];
[9];
[5]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division; Oakland Univ., Rochester, MI (United States). Dept. of Chemistry
- Tsinghua Univ., Beijing (China). State Key Joint Lab. of Environment Simulation and Pollution Control, School of Environment
- Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics, Dept. of Microbiology and Plant Biology
- Tsinghua Univ., Beijing (China). State Key Joint Lab. of Environment Simulation and Pollution Control, School of Environment; Univ. of Oklahoma, Norman, OK (United States). Inst. for Environmental Genomics, Dept. of Microbiology and Plant Biology; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division
- Chinese Academy of Sciences (CAS), Beijing (China). Research Center for Eco-Environmental Sciences
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Climate Change Science Inst.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division; Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (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:
- 1394250
- Alternate Identifier(s):
- OSTI ID: 1416922
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Frontiers in Microbiology
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 1664-302X
- Publisher:
- Frontiers Research Foundation
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; soil organic carbon; climate warming; microbial community; functional genes; permafrost
Citation Formats
Yang, Ziming, Yang, Sihang, Van Nostrand, Joy D., Zhou, Jizhong, Fang, Wei, Qi, Qi, Liu, Yurong, Wullschleger, Stan D., Liang, Liyuan, Graham, David E., Yang, Yunfeng, and Gu, Baohua. Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment. United States: N. p., 2017.
Web. doi:10.3389/fmicb.2017.01741.
Yang, Ziming, Yang, Sihang, Van Nostrand, Joy D., Zhou, Jizhong, Fang, Wei, Qi, Qi, Liu, Yurong, Wullschleger, Stan D., Liang, Liyuan, Graham, David E., Yang, Yunfeng, & Gu, Baohua. Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment. United States. https://doi.org/10.3389/fmicb.2017.01741
Yang, Ziming, Yang, Sihang, Van Nostrand, Joy D., Zhou, Jizhong, Fang, Wei, Qi, Qi, Liu, Yurong, Wullschleger, Stan D., Liang, Liyuan, Graham, David E., Yang, Yunfeng, and Gu, Baohua. Tue .
"Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment". United States. https://doi.org/10.3389/fmicb.2017.01741. https://www.osti.gov/servlets/purl/1394250.
@article{osti_1394250,
title = {Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment},
author = {Yang, Ziming and Yang, Sihang and Van Nostrand, Joy D. and Zhou, Jizhong and Fang, Wei and Qi, Qi and Liu, Yurong and Wullschleger, Stan D. and Liang, Liyuan and Graham, David E. and Yang, Yunfeng and Gu, Baohua},
abstractNote = {Microbial decomposition of soil organic carbon (SOC) in thawing Arctic permafrost is important in determining greenhouse gas feedbacks of tundra ecosystems to climate. However, the changes in microbial community structure during SOC decomposition are poorly known. Here we examine these changes using frozen soils from Barrow, Alaska, USA, in anoxic microcosm incubation at -2 and 8°C for 122 days. The functional gene array GeoChip was used to determine microbial community structure and the functional genes associated with SOC degradation, methanogenesis, and Fe(III) reduction. Results show that soil incubation after 122 days at 8°C significantly decreased functional gene abundance (P < 0.05) associated with SOC degradation, fermentation, methanogenesis, and iron cycling, particularly in organic-rich soil. These observations correspond well with decreases in labile SOC content (e.g., reducing sugar and ethanol), methane and CO 2 production, and Fe(III) reduction. In contrast, the community functional structure was largely unchanged in the -2°C incubation. Soil type (i.e., organic vs. mineral) and the availability of labile SOC were among the most significant factors impacting microbial community structure. These results demonstrate the important roles of microbial community in SOC degradation and support previous findings that SOC in organic-rich Arctic tundra is highly vulnerable to microbial degradation under warming.},
doi = {10.3389/fmicb.2017.01741},
journal = {Frontiers in Microbiology},
number = ,
volume = 8,
place = {United States},
year = {Tue Sep 19 00:00:00 EDT 2017},
month = {Tue Sep 19 00:00:00 EDT 2017}
}
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The microbe-mediated mechanisms affecting topsoil carbon stock in Tibetan grasslands
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Nitrogen limitation constrains sustainability of ecosystem response to CO2
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journal, March 2006
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Terrestrial ecosystem carbon dynamics and climate feedbacks
journal, January 2008
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Metagenomic analysis of a permafrost microbial community reveals a rapid response to thaw
journal, November 2011
- Mackelprang, Rachel; Waldrop, Mark P.; DeAngelis, Kristen M.
- Nature, Vol. 480, Issue 7377
Preservation of organic matter in sediments promoted by iron
journal, March 2012
- Lalonde, Karine; Mucci, Alfonso; Ouellet, Alexandre
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Microbial mediation of carbon-cycle feedbacks to climate warming
journal, December 2011
- Zhou, Jizhong; Xue, Kai; Xie, Jianping
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Tundra soil carbon is vulnerable to rapid microbial decomposition under climate warming
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Aridity threshold in controlling ecosystem nitrogen cycling in arid and semi-arid grasslands
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High stocks of soil organic carbon in the North American Arctic region
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Microorganisms pumping iron: anaerobic microbial iron oxidation and reduction
journal, October 2006
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One hundred years of Arctic surface temperature variation due to anthropogenic influence
journal, September 2013
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Genomic plasticity of the causative agent of melioidosis, Burkholderia pseudomallei
journal, September 2004
- Holden, M. T. G.; Titball, R. W.; Peacock, S. J.
- Proceedings of the National Academy of Sciences, Vol. 101, Issue 39
Metabolic and trophic interactions modulate methane production by Arctic peat microbiota in response to warming
journal, April 2015
- Tveit, Alexander Tøsdal; Urich, Tim; Frenzel, Peter
- Proceedings of the National Academy of Sciences, Vol. 112, Issue 19
Consistent responses of soil microbial communities to elevated nutrient inputs in grasslands across the globe
journal, August 2015
- Leff, Jonathan W.; Jones, Stuart E.; Prober, Suzanne M.
- Proceedings of the National Academy of Sciences, Vol. 112, Issue 35
The interactive effects of soil transplant into colder regions and cropping on soil microbiology and biogeochemistry: Effects of northward soil transplant and cropping
journal, February 2014
- Liu, Shanshan; Wang, Feng; Xue, Kai
- Environmental Microbiology, Vol. 17, Issue 3
Iron oxidation stimulates organic matter decomposition in humid tropical forest soils
journal, July 2013
- Hall, Steven J.; Silver, Whendee L.
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