Nitrogen enrichment causes the thermal adaptation of soil microbial respiration
As the climate warms, the feedback between soil carbon (C) and climate has the potential to decrease in magnitude over time due to the thermal adaptation of microbial respiration. However, the strength of microbial thermal adaptation (i.e., the degree to which microbial respiration adapts to tempera...
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ftzenodo:oai:zenodo.org:4483120 2024-09-15T18:30:07+00:00 Nitrogen enrichment causes the thermal adaptation of soil microbial respiration Huimin Sun Hongyang Chen Jintao Li Yan Zhang Xiang Liu Bo Li Shurong Zhou Ming Nie 2021-01-31 https://doi.org/10.5281/zenodo.4483120 unknown Zenodo https://doi.org/10.5281/zenodo.4483119 https://doi.org/10.5281/zenodo.4483120 oai:zenodo.org:4483120 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/other 2021 ftzenodo https://doi.org/10.5281/zenodo.448312010.5281/zenodo.4483119 2024-07-26T05:06:48Z As the climate warms, the feedback between soil carbon (C) and climate has the potential to decrease in magnitude over time due to the thermal adaptation of microbial respiration. However, the strength of microbial thermal adaptation (i.e., the degree to which microbial respiration adapts to temperature change) is uncertain, partly because the response of microbial respiration is regulated by multiple environmental factors acting simultaneously rather than by temperature alone; however, the combined effects of an environmental factor and warming on the thermal adaptation of microbial respiration have never been assessed. Using a 9-year two-way factorial experiment involving warming (daytime: 1.80℃; nighttime: 0.77℃) and nitrogen (N) enrichment (up to 15 g m -2 y -1 ) treatments in an alpine permafrost on the Tibetan Plateau, we show that microbial respiration adapts to warming only under exogenous N enrichment and that the strength of thermal adaptation gradually increases as N enrichment increases. We identified two contrasting pathways by which N enrichment appears to affect the strength of thermal adaptation—via an increase caused by soil acidification and a decrease caused by the inhibition of soil C availability and stimulation of soil C-degrading enzymes—with a net positive effect of N enrichment on microbial thermal adaptation. Our findings emphasize the importance of considering multiple environmental change factors in shaping the strength of thermal adaptation when predicting future soil C-climate feedbacks. Other/Unknown Material permafrost Zenodo |
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As the climate warms, the feedback between soil carbon (C) and climate has the potential to decrease in magnitude over time due to the thermal adaptation of microbial respiration. However, the strength of microbial thermal adaptation (i.e., the degree to which microbial respiration adapts to temperature change) is uncertain, partly because the response of microbial respiration is regulated by multiple environmental factors acting simultaneously rather than by temperature alone; however, the combined effects of an environmental factor and warming on the thermal adaptation of microbial respiration have never been assessed. Using a 9-year two-way factorial experiment involving warming (daytime: 1.80℃; nighttime: 0.77℃) and nitrogen (N) enrichment (up to 15 g m -2 y -1 ) treatments in an alpine permafrost on the Tibetan Plateau, we show that microbial respiration adapts to warming only under exogenous N enrichment and that the strength of thermal adaptation gradually increases as N enrichment increases. We identified two contrasting pathways by which N enrichment appears to affect the strength of thermal adaptation—via an increase caused by soil acidification and a decrease caused by the inhibition of soil C availability and stimulation of soil C-degrading enzymes—with a net positive effect of N enrichment on microbial thermal adaptation. Our findings emphasize the importance of considering multiple environmental change factors in shaping the strength of thermal adaptation when predicting future soil C-climate feedbacks. |
format |
Other/Unknown Material |
author |
Huimin Sun Hongyang Chen Jintao Li Yan Zhang Xiang Liu Bo Li Shurong Zhou Ming Nie |
spellingShingle |
Huimin Sun Hongyang Chen Jintao Li Yan Zhang Xiang Liu Bo Li Shurong Zhou Ming Nie Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
author_facet |
Huimin Sun Hongyang Chen Jintao Li Yan Zhang Xiang Liu Bo Li Shurong Zhou Ming Nie |
author_sort |
Huimin Sun |
title |
Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
title_short |
Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
title_full |
Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
title_fullStr |
Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
title_full_unstemmed |
Nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
title_sort |
nitrogen enrichment causes the thermal adaptation of soil microbial respiration |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5281/zenodo.4483120 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://doi.org/10.5281/zenodo.4483119 https://doi.org/10.5281/zenodo.4483120 oai:zenodo.org:4483120 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.448312010.5281/zenodo.4483119 |
_version_ |
1810471594150068224 |