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Salinity causes differences in stratigraphic methane sources and sinks

Methane metabolism, driven by methanogenic and methanotrophic microorganisms, plays a pivotal role in the carbon cycle. As seawater intrusion and soil salinization rise due to global environmental shifts, understanding how salinity affects methane emissions, especially in deep strata, becomes impera...

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Autores principales: Qu, Ying, Zhao, Yuxiang, Yao, Xiangwu, Wang, Jiaqi, Liu, Zishu, Hong, Yi, Zheng, Ping, Wang, Lizhong, Hu, Baolan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10692758/
https://www.ncbi.nlm.nih.gov/pubmed/38046178
http://dx.doi.org/10.1016/j.ese.2023.100334
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author Qu, Ying
Zhao, Yuxiang
Yao, Xiangwu
Wang, Jiaqi
Liu, Zishu
Hong, Yi
Zheng, Ping
Wang, Lizhong
Hu, Baolan
author_facet Qu, Ying
Zhao, Yuxiang
Yao, Xiangwu
Wang, Jiaqi
Liu, Zishu
Hong, Yi
Zheng, Ping
Wang, Lizhong
Hu, Baolan
author_sort Qu, Ying
collection PubMed
description Methane metabolism, driven by methanogenic and methanotrophic microorganisms, plays a pivotal role in the carbon cycle. As seawater intrusion and soil salinization rise due to global environmental shifts, understanding how salinity affects methane emissions, especially in deep strata, becomes imperative. Yet, insights into stratigraphic methane release under varying salinity conditions remain sparse. Here we investigate the effects of salinity on methane metabolism across terrestrial and coastal strata (15–40 m depth) through in situ and microcosm simulation studies. Coastal strata, exhibiting a salinity level five times greater than terrestrial strata, manifested a 12.05% decrease in total methane production, but a staggering 687.34% surge in methane oxidation, culminating in 146.31% diminished methane emissions. Salinity emerged as a significant factor shaping the methane-metabolizing microbial community's dynamics, impacting the methanogenic archaeal, methanotrophic archaeal, and methanotrophic bacterial communities by 16.53%, 27.25%, and 22.94%, respectively. Furthermore, microbial interactions influenced strata system methane metabolism. Metabolic pathway analyses suggested Atribacteria JS1's potential role in organic matter decomposition, facilitating methane production via Methanofastidiosales. This study thus offers a comprehensive lens to comprehend stratigraphic methane emission dynamics and the overarching factors modulating them.
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spelling pubmed-106927582023-12-03 Salinity causes differences in stratigraphic methane sources and sinks Qu, Ying Zhao, Yuxiang Yao, Xiangwu Wang, Jiaqi Liu, Zishu Hong, Yi Zheng, Ping Wang, Lizhong Hu, Baolan Environ Sci Ecotechnol Original Research Methane metabolism, driven by methanogenic and methanotrophic microorganisms, plays a pivotal role in the carbon cycle. As seawater intrusion and soil salinization rise due to global environmental shifts, understanding how salinity affects methane emissions, especially in deep strata, becomes imperative. Yet, insights into stratigraphic methane release under varying salinity conditions remain sparse. Here we investigate the effects of salinity on methane metabolism across terrestrial and coastal strata (15–40 m depth) through in situ and microcosm simulation studies. Coastal strata, exhibiting a salinity level five times greater than terrestrial strata, manifested a 12.05% decrease in total methane production, but a staggering 687.34% surge in methane oxidation, culminating in 146.31% diminished methane emissions. Salinity emerged as a significant factor shaping the methane-metabolizing microbial community's dynamics, impacting the methanogenic archaeal, methanotrophic archaeal, and methanotrophic bacterial communities by 16.53%, 27.25%, and 22.94%, respectively. Furthermore, microbial interactions influenced strata system methane metabolism. Metabolic pathway analyses suggested Atribacteria JS1's potential role in organic matter decomposition, facilitating methane production via Methanofastidiosales. This study thus offers a comprehensive lens to comprehend stratigraphic methane emission dynamics and the overarching factors modulating them. Elsevier 2023-10-19 /pmc/articles/PMC10692758/ /pubmed/38046178 http://dx.doi.org/10.1016/j.ese.2023.100334 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research
Qu, Ying
Zhao, Yuxiang
Yao, Xiangwu
Wang, Jiaqi
Liu, Zishu
Hong, Yi
Zheng, Ping
Wang, Lizhong
Hu, Baolan
Salinity causes differences in stratigraphic methane sources and sinks
title Salinity causes differences in stratigraphic methane sources and sinks
title_full Salinity causes differences in stratigraphic methane sources and sinks
title_fullStr Salinity causes differences in stratigraphic methane sources and sinks
title_full_unstemmed Salinity causes differences in stratigraphic methane sources and sinks
title_short Salinity causes differences in stratigraphic methane sources and sinks
title_sort salinity causes differences in stratigraphic methane sources and sinks
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10692758/
https://www.ncbi.nlm.nih.gov/pubmed/38046178
http://dx.doi.org/10.1016/j.ese.2023.100334
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