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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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 |
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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 |
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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 |
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13 |
container_issue |
12 |
container_start_page |
2901 |
op_container_end_page |
2915 |
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1766166486951395328 |