Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon

The susceptibility of soil organic carbon (SOC) in tundra to microbial decomposition under warmer climate scenarios potentially threatens a massive positive feedback to climate change, but the underlying mechanisms of stable SOC decomposition remain elusive. Herein, Alaskan tundra soils from three d...

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Published in:The ISME Journal
Main Authors: Hale, Lauren, Feng, Wenting, Yin, Huaqun, Guo, Xue, Zhou, Xishu, Bracho, Rosvel, Pegoraro, Elaine, Penton, C. Ryan, Wu, Liyou, Cole, James, Konstantinidis, Konstantinos T., Luo, Yiqi, Tiedje, James M., Schuur, Edward. A. G., Zhou, Jizhong
Format: Text
Language:English
Published: Nature Publishing Group UK 2019
Subjects:
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863828/
http://www.ncbi.nlm.nih.gov/pubmed/31384013
https://doi.org/10.1038/s41396-019-0485-x
id ftpubmed:oai:pubmedcentral.nih.gov:6863828
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spelling ftpubmed:oai:pubmedcentral.nih.gov:6863828 2023-05-15T17:57:58+02:00 Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon Hale, Lauren Feng, Wenting Yin, Huaqun Guo, Xue Zhou, Xishu Bracho, Rosvel Pegoraro, Elaine Penton, C. Ryan Wu, Liyou Cole, James Konstantinidis, Konstantinos T. Luo, Yiqi Tiedje, James M. Schuur, Edward. A. G. Zhou, Jizhong 2019-08-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863828/ http://www.ncbi.nlm.nih.gov/pubmed/31384013 https://doi.org/10.1038/s41396-019-0485-x en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863828/ http://www.ncbi.nlm.nih.gov/pubmed/31384013 http://dx.doi.org/10.1038/s41396-019-0485-x © The Author(s), under exclusive licence to International Society for Microbial Ecology 2019 ISME J Article Text 2019 ftpubmed https://doi.org/10.1038/s41396-019-0485-x 2020-12-06T01:19:42Z The susceptibility of soil organic carbon (SOC) in tundra to microbial decomposition under warmer climate scenarios potentially threatens a massive positive feedback to climate change, but the underlying mechanisms of stable SOC decomposition remain elusive. Herein, Alaskan tundra soils from three depths (a fibric O horizon with litter and course roots, an O horizon with decomposing litter and roots, and a mineral-organic mix, laying just above the permafrost) were incubated. Resulting respiration data were assimilated into a 3-pool model to derive decomposition kinetic parameters for fast, slow, and passive SOC pools. Bacterial, archaeal, and fungal taxa and microbial functional genes were profiled throughout the 3-year incubation. Correlation analyses and a Random Forest approach revealed associations between model parameters and microbial community profiles, taxa, and traits. There were more associations between the microbial community data and the SOC decomposition parameters of slow and passive SOC pools than those of the fast SOC pool. Also, microbial community profiles were better predictors of model parameters in deeper soils, which had higher mineral contents and relatively greater quantities of old SOC than in surface soils. Overall, our analyses revealed the functional potential of microbial communities to decompose tundra SOC through a suite of specialized genes and taxa. These results portray divergent strategies by which microbial communities access SOC pools across varying depths, lending mechanistic insights into the vulnerability of what is considered stable SOC in tundra regions. Text permafrost Tundra PubMed Central (PMC) The ISME Journal 13 12 2901 2915
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Article
spellingShingle Article
Hale, Lauren
Feng, Wenting
Yin, Huaqun
Guo, Xue
Zhou, Xishu
Bracho, Rosvel
Pegoraro, Elaine
Penton, C. Ryan
Wu, Liyou
Cole, James
Konstantinidis, Konstantinos T.
Luo, Yiqi
Tiedje, James M.
Schuur, Edward. A. G.
Zhou, Jizhong
Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
topic_facet Article
description The susceptibility of soil organic carbon (SOC) in tundra to microbial decomposition under warmer climate scenarios potentially threatens a massive positive feedback to climate change, but the underlying mechanisms of stable SOC decomposition remain elusive. Herein, Alaskan tundra soils from three depths (a fibric O horizon with litter and course roots, an O horizon with decomposing litter and roots, and a mineral-organic mix, laying just above the permafrost) were incubated. Resulting respiration data were assimilated into a 3-pool model to derive decomposition kinetic parameters for fast, slow, and passive SOC pools. Bacterial, archaeal, and fungal taxa and microbial functional genes were profiled throughout the 3-year incubation. Correlation analyses and a Random Forest approach revealed associations between model parameters and microbial community profiles, taxa, and traits. There were more associations between the microbial community data and the SOC decomposition parameters of slow and passive SOC pools than those of the fast SOC pool. Also, microbial community profiles were better predictors of model parameters in deeper soils, which had higher mineral contents and relatively greater quantities of old SOC than in surface soils. Overall, our analyses revealed the functional potential of microbial communities to decompose tundra SOC through a suite of specialized genes and taxa. These results portray divergent strategies by which microbial communities access SOC pools across varying depths, lending mechanistic insights into the vulnerability of what is considered stable SOC in tundra regions.
format Text
author Hale, Lauren
Feng, Wenting
Yin, Huaqun
Guo, Xue
Zhou, Xishu
Bracho, Rosvel
Pegoraro, Elaine
Penton, C. Ryan
Wu, Liyou
Cole, James
Konstantinidis, Konstantinos T.
Luo, Yiqi
Tiedje, James M.
Schuur, Edward. A. G.
Zhou, Jizhong
author_facet Hale, Lauren
Feng, Wenting
Yin, Huaqun
Guo, Xue
Zhou, Xishu
Bracho, Rosvel
Pegoraro, Elaine
Penton, C. Ryan
Wu, Liyou
Cole, James
Konstantinidis, Konstantinos T.
Luo, Yiqi
Tiedje, James M.
Schuur, Edward. A. G.
Zhou, Jizhong
author_sort Hale, Lauren
title Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
title_short Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
title_full Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
title_fullStr Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
title_full_unstemmed Tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
title_sort tundra microbial community taxa and traits predict decomposition parameters of stable, old soil organic carbon
publisher Nature Publishing Group UK
publishDate 2019
url http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863828/
http://www.ncbi.nlm.nih.gov/pubmed/31384013
https://doi.org/10.1038/s41396-019-0485-x
genre permafrost
Tundra
genre_facet permafrost
Tundra
op_source ISME J
op_relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863828/
http://www.ncbi.nlm.nih.gov/pubmed/31384013
http://dx.doi.org/10.1038/s41396-019-0485-x
op_rights © The Author(s), under exclusive licence to International Society for Microbial Ecology 2019
op_doi https://doi.org/10.1038/s41396-019-0485-x
container_title The ISME Journal
container_volume 13
container_issue 12
container_start_page 2901
op_container_end_page 2915
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