Impacts of The Wetland Sedge Carex aquatilis on Microbial Community and Methane Metabolisms
Abstract
Microbial activity in the soil of wetlands is responsible for the emission of more methane to the atmosphere than all other natural sources combined. This microbial activity is heavily impacted by plant roots, which influence the microbial community by exuding organic compounds and by leaking oxygen into an otherwise anoxic environment. This study compared the microbial communities of planted and unplanted wetland soil from an Alaskan bog to elucidate how plant growth influences populations and metabolisms of methanogens and methanotrophs. A common boreal wetland sedge, Carex aquatilis, was grown in the laboratory and DNA samples were sequenced from the rhizosphere, unplanted bulk soil, and a simulated rhizosphere with oxygen input but no organic carbon. The abundance of both methanogens and methanotrophs were positively correlated with methane emissions. Among the methanotrophs, both aerobic and anaerobic methane oxidizing microbes were more common in the rhizosphere of mature plants than in unplanted soil, while facultative methanotrophs capable of utilizing either methane or other molecules became relatively less common. Furthermore, these trends indicate that the roots in this experiment created an environment which favored highly specialized microbial metabolisms over generalist approaches. One aspect of this specialized microbiome is the presence of both aerobic andmore »
- Authors:
-
[1];
[1];
[2];
[1];
- Univ. of Washington, Seattle, WA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
- OSTI Identifier:
- 1860255
- Alternate Identifier(s):
- OSTI ID: 1834351
- Report Number(s):
- PNNL-SA-160970
Journal ID: ISSN 0032-079X
- Grant/Contract Number:
- AC05-76RL01830; SC-0010338; AC02-05CH11231; SC0014664; SC0010338
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plant and Soil
- Additional Journal Information:
- Journal Volume: 471; Journal Issue: 1-2; Journal ID: ISSN 0032-079X
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; methane; wetlands; bog; microbial priming; root exudates; climate change
Citation Formats
Waldo, Nicholas B., Chistoserdova, Ludmila, Hu, Dehong, Gough, Heidi L., and Neumann, Rebecca B. Impacts of The Wetland Sedge Carex aquatilis on Microbial Community and Methane Metabolisms. United States: N. p., 2021.
Web. doi:10.1007/s11104-021-05239-7.
Waldo, Nicholas B., Chistoserdova, Ludmila, Hu, Dehong, Gough, Heidi L., & Neumann, Rebecca B. Impacts of The Wetland Sedge Carex aquatilis on Microbial Community and Methane Metabolisms. United States. https://doi.org/10.1007/s11104-021-05239-7
Waldo, Nicholas B., Chistoserdova, Ludmila, Hu, Dehong, Gough, Heidi L., and Neumann, Rebecca B. Thu .
"Impacts of The Wetland Sedge Carex aquatilis on Microbial Community and Methane Metabolisms". United States. https://doi.org/10.1007/s11104-021-05239-7. https://www.osti.gov/servlets/purl/1860255.
@article{osti_1860255,
title = {Impacts of The Wetland Sedge Carex aquatilis on Microbial Community and Methane Metabolisms},
author = {Waldo, Nicholas B. and Chistoserdova, Ludmila and Hu, Dehong and Gough, Heidi L. and Neumann, Rebecca B.},
abstractNote = {Microbial activity in the soil of wetlands is responsible for the emission of more methane to the atmosphere than all other natural sources combined. This microbial activity is heavily impacted by plant roots, which influence the microbial community by exuding organic compounds and by leaking oxygen into an otherwise anoxic environment. This study compared the microbial communities of planted and unplanted wetland soil from an Alaskan bog to elucidate how plant growth influences populations and metabolisms of methanogens and methanotrophs. A common boreal wetland sedge, Carex aquatilis, was grown in the laboratory and DNA samples were sequenced from the rhizosphere, unplanted bulk soil, and a simulated rhizosphere with oxygen input but no organic carbon. The abundance of both methanogens and methanotrophs were positively correlated with methane emissions. Among the methanotrophs, both aerobic and anaerobic methane oxidizing microbes were more common in the rhizosphere of mature plants than in unplanted soil, while facultative methanotrophs capable of utilizing either methane or other molecules became relatively less common. Furthermore, these trends indicate that the roots in this experiment created an environment which favored highly specialized microbial metabolisms over generalist approaches. One aspect of this specialized microbiome is the presence of both aerobic and anaerobic metabolisms, which indicates that oxygen is present but is a limiting resource controlling competition.},
doi = {10.1007/s11104-021-05239-7},
journal = {Plant and Soil},
number = 1-2,
volume = 471,
place = {United States},
year = {Thu Dec 02 00:00:00 EST 2021},
month = {Thu Dec 02 00:00:00 EST 2021}
}
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