Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms
Climate warming causes permafrost thaw predicted to increase toxic methylmercury (MeHg) and greenhouse gas [i.e., methane (CH 4 ), carbon dioxide (CO 2 ), and nitrous oxide (N 2 O)] formation. A microcosm incubation study with Arctic tundra soil over 145 days demonstrates that N 2 O at 0.1 and 1 mM...
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Online Access: | http://www.osti.gov/servlets/purl/1968707 https://www.osti.gov/biblio/1968707 https://doi.org/10.1021/acs.est.2c09457 |
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ftosti:oai:osti.gov:1968707 2023-07-30T04:01:06+02:00 Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms Zhang, Lijie Yin, Yongchao Sun, Yanchen Liang, Xujun Graham, David E. Pierce, Eric M. Löffler, Frank E. Gu, Baohua 2023-04-13 application/pdf http://www.osti.gov/servlets/purl/1968707 https://www.osti.gov/biblio/1968707 https://doi.org/10.1021/acs.est.2c09457 unknown http://www.osti.gov/servlets/purl/1968707 https://www.osti.gov/biblio/1968707 https://doi.org/10.1021/acs.est.2c09457 doi:10.1021/acs.est.2c09457 2023 ftosti https://doi.org/10.1021/acs.est.2c09457 2023-07-11T10:26:24Z Climate warming causes permafrost thaw predicted to increase toxic methylmercury (MeHg) and greenhouse gas [i.e., methane (CH 4 ), carbon dioxide (CO 2 ), and nitrous oxide (N 2 O)] formation. A microcosm incubation study with Arctic tundra soil over 145 days demonstrates that N 2 O at 0.1 and 1 mM markedly inhibited microbial MeHg formation, methanogenesis, and sulfate reduction, while it slightly promoted CO 2 production. Microbial community analyses indicate that N 2 O decreased the relative abundances of methanogenic archaea and microbial clades implicated in sulfate reduction and MeHg formation. Following depletion of N 2 O, both MeHg formation and sulfate reduction rapidly resumed, whereas CH 4 production remained low, suggesting that N 2 O affected susceptible microbial guilds differently. MeHg formation strongly coincided with sulfate reduction, supporting prior reports linking sulfate-reducing bacteria to MeHg formation in the Arctic soil. Here, this research highlights complex biogeochemical interactions in governing MeHg and CH 4 formation and lays the foundation for future mechanistic studies for improved predictive understanding of MeHg and greenhouse gas fluxes from thawing permafrost ecosystems. Other/Unknown Material Arctic permafrost Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Environmental Science & Technology 57 14 5655 5665 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
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description |
Climate warming causes permafrost thaw predicted to increase toxic methylmercury (MeHg) and greenhouse gas [i.e., methane (CH 4 ), carbon dioxide (CO 2 ), and nitrous oxide (N 2 O)] formation. A microcosm incubation study with Arctic tundra soil over 145 days demonstrates that N 2 O at 0.1 and 1 mM markedly inhibited microbial MeHg formation, methanogenesis, and sulfate reduction, while it slightly promoted CO 2 production. Microbial community analyses indicate that N 2 O decreased the relative abundances of methanogenic archaea and microbial clades implicated in sulfate reduction and MeHg formation. Following depletion of N 2 O, both MeHg formation and sulfate reduction rapidly resumed, whereas CH 4 production remained low, suggesting that N 2 O affected susceptible microbial guilds differently. MeHg formation strongly coincided with sulfate reduction, supporting prior reports linking sulfate-reducing bacteria to MeHg formation in the Arctic soil. Here, this research highlights complex biogeochemical interactions in governing MeHg and CH 4 formation and lays the foundation for future mechanistic studies for improved predictive understanding of MeHg and greenhouse gas fluxes from thawing permafrost ecosystems. |
author |
Zhang, Lijie Yin, Yongchao Sun, Yanchen Liang, Xujun Graham, David E. Pierce, Eric M. Löffler, Frank E. Gu, Baohua |
spellingShingle |
Zhang, Lijie Yin, Yongchao Sun, Yanchen Liang, Xujun Graham, David E. Pierce, Eric M. Löffler, Frank E. Gu, Baohua Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
author_facet |
Zhang, Lijie Yin, Yongchao Sun, Yanchen Liang, Xujun Graham, David E. Pierce, Eric M. Löffler, Frank E. Gu, Baohua |
author_sort |
Zhang, Lijie |
title |
Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
title_short |
Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
title_full |
Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
title_fullStr |
Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
title_full_unstemmed |
Inhibition of Methylmercury and Methane Formation by Nitrous Oxide in Arctic Tundra Soil Microcosms |
title_sort |
inhibition of methylmercury and methane formation by nitrous oxide in arctic tundra soil microcosms |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1968707 https://www.osti.gov/biblio/1968707 https://doi.org/10.1021/acs.est.2c09457 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Tundra |
genre_facet |
Arctic permafrost Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1968707 https://www.osti.gov/biblio/1968707 https://doi.org/10.1021/acs.est.2c09457 doi:10.1021/acs.est.2c09457 |
op_doi |
https://doi.org/10.1021/acs.est.2c09457 |
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Environmental Science & Technology |
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57 |
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14 |
container_start_page |
5655 |
op_container_end_page |
5665 |
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1772811859017072640 |