Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions
Understanding the impacts of diurnal freeze–thaw cycles (DFTCs) on soil microorganisms and greenhouse gas emissions is crucial for assessing soil carbon and nitrogen cycles in the alpine ecosystems. However, relevant studies in the permafrost regions in the Qinghai-Tibet Plateau (QTP) are still lack...
Published in: | Frontiers in Microbiology |
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Online Access: | http://dx.doi.org/10.3389/fmicb.2022.1056953 https://www.frontiersin.org/articles/10.3389/fmicb.2022.1056953/full |
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crfrontiers:10.3389/fmicb.2022.1056953 2024-02-11T10:07:51+01:00 Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions Lv, Zhenying Gu, Yuzheng Chen, Shengyun Chen, Jianwei Jia, Yinglan National Natural Science Foundation of China Research and Development State Key Laboratory of Cryospheric Science Chinese Academy of Sciences 2022 http://dx.doi.org/10.3389/fmicb.2022.1056953 https://www.frontiersin.org/articles/10.3389/fmicb.2022.1056953/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Microbiology volume 13 ISSN 1664-302X Microbiology (medical) Microbiology journal-article 2022 crfrontiers https://doi.org/10.3389/fmicb.2022.1056953 2024-01-26T09:59:52Z Understanding the impacts of diurnal freeze–thaw cycles (DFTCs) on soil microorganisms and greenhouse gas emissions is crucial for assessing soil carbon and nitrogen cycles in the alpine ecosystems. However, relevant studies in the permafrost regions in the Qinghai-Tibet Plateau (QTP) are still lacking. In this study, we used high-throughput pyrosequencing and static chamber-gas chromatogram to study the changes in topsoil bacteria and fluxes of greenhouse gases, including carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O), during autumn DFTCs in the permafrost regions of the Shule River headwaters on the western part of Qilian Mountains, northeast margin of the QTP. The results showed that the bacterial communities contained a total of 35 phyla, 88 classes, 128 orders, 153 families, 176 genera, and 113 species. The dominant phyla were Proteobacteria , Acidobacteria , Actinobacteria , Chloroflexi , and Gemmatimonadetes . Two DFTCs led to a trend of increasing bacterial diversity and significant changes in the relative abundance of 17 known bacteria at the family, genus, and species levels. These were predominantly influenced by soil temperature, water content, and salinity. In addition, CO 2 flux significantly increased while CH 4 flux distinctly decreased, and N 2 O flux tended to increase after two DFTCs, with soil bacteria being the primary affecting variable. This study can provide a scientific insight into the impact of climate change on biogeochemical cycles of the QTP. Article in Journal/Newspaper permafrost Frontiers (Publisher) Frontiers in Microbiology 13 |
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topic |
Microbiology (medical) Microbiology |
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Microbiology (medical) Microbiology Lv, Zhenying Gu, Yuzheng Chen, Shengyun Chen, Jianwei Jia, Yinglan Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
topic_facet |
Microbiology (medical) Microbiology |
description |
Understanding the impacts of diurnal freeze–thaw cycles (DFTCs) on soil microorganisms and greenhouse gas emissions is crucial for assessing soil carbon and nitrogen cycles in the alpine ecosystems. However, relevant studies in the permafrost regions in the Qinghai-Tibet Plateau (QTP) are still lacking. In this study, we used high-throughput pyrosequencing and static chamber-gas chromatogram to study the changes in topsoil bacteria and fluxes of greenhouse gases, including carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O), during autumn DFTCs in the permafrost regions of the Shule River headwaters on the western part of Qilian Mountains, northeast margin of the QTP. The results showed that the bacterial communities contained a total of 35 phyla, 88 classes, 128 orders, 153 families, 176 genera, and 113 species. The dominant phyla were Proteobacteria , Acidobacteria , Actinobacteria , Chloroflexi , and Gemmatimonadetes . Two DFTCs led to a trend of increasing bacterial diversity and significant changes in the relative abundance of 17 known bacteria at the family, genus, and species levels. These were predominantly influenced by soil temperature, water content, and salinity. In addition, CO 2 flux significantly increased while CH 4 flux distinctly decreased, and N 2 O flux tended to increase after two DFTCs, with soil bacteria being the primary affecting variable. This study can provide a scientific insight into the impact of climate change on biogeochemical cycles of the QTP. |
author2 |
National Natural Science Foundation of China Research and Development State Key Laboratory of Cryospheric Science Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Lv, Zhenying Gu, Yuzheng Chen, Shengyun Chen, Jianwei Jia, Yinglan |
author_facet |
Lv, Zhenying Gu, Yuzheng Chen, Shengyun Chen, Jianwei Jia, Yinglan |
author_sort |
Lv, Zhenying |
title |
Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
title_short |
Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
title_full |
Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
title_fullStr |
Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
title_full_unstemmed |
Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
title_sort |
effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmicb.2022.1056953 https://www.frontiersin.org/articles/10.3389/fmicb.2022.1056953/full |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Microbiology volume 13 ISSN 1664-302X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2022.1056953 |
container_title |
Frontiers in Microbiology |
container_volume |
13 |
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1790606665796550656 |