Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration
In sunlit waters, photochemical alteration of dissolved organic carbon (DOC) impacts the microbial respiration of DOC to CO2. This coupled photochemical and biological degradation of DOC is especially critical for carbon budgets in the Arctic, where thawing permafrost soils increase opportunities fo...
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ftpubmed:oai:pubmedcentral.nih.gov:5626735 2023-05-15T15:03:05+02:00 Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration Ward, Collin P. Nalven, Sarah G. Crump, Byron C. Kling, George W. Cory, Rose M. 2017-10-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626735/ https://doi.org/10.1038/s41467-017-00759-2 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626735/ http://dx.doi.org/10.1038/s41467-017-00759-2 © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/s41467-017-00759-2 2017-10-08T00:34:45Z In sunlit waters, photochemical alteration of dissolved organic carbon (DOC) impacts the microbial respiration of DOC to CO2. This coupled photochemical and biological degradation of DOC is especially critical for carbon budgets in the Arctic, where thawing permafrost soils increase opportunities for DOC oxidation to CO2 in surface waters, thereby reinforcing global warming. Here we show how and why sunlight exposure impacts microbial respiration of DOC draining permafrost soils. Sunlight significantly increases or decreases microbial respiration of DOC depending on whether photo-alteration produces or removes molecules that native microbial communities used prior to light exposure. Using high-resolution chemical and microbial approaches, we show that rates of DOC processing by microbes are likely governed by a combination of the abundance and lability of DOC exported from land to water and produced by photochemical processes, and the capacity and timescale that microbial communities have to adapt to metabolize photo-altered DOC. Text Arctic Global warming permafrost PubMed Central (PMC) Arctic Nature Communications 8 1 |
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Article Ward, Collin P. Nalven, Sarah G. Crump, Byron C. Kling, George W. Cory, Rose M. Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
topic_facet |
Article |
description |
In sunlit waters, photochemical alteration of dissolved organic carbon (DOC) impacts the microbial respiration of DOC to CO2. This coupled photochemical and biological degradation of DOC is especially critical for carbon budgets in the Arctic, where thawing permafrost soils increase opportunities for DOC oxidation to CO2 in surface waters, thereby reinforcing global warming. Here we show how and why sunlight exposure impacts microbial respiration of DOC draining permafrost soils. Sunlight significantly increases or decreases microbial respiration of DOC depending on whether photo-alteration produces or removes molecules that native microbial communities used prior to light exposure. Using high-resolution chemical and microbial approaches, we show that rates of DOC processing by microbes are likely governed by a combination of the abundance and lability of DOC exported from land to water and produced by photochemical processes, and the capacity and timescale that microbial communities have to adapt to metabolize photo-altered DOC. |
format |
Text |
author |
Ward, Collin P. Nalven, Sarah G. Crump, Byron C. Kling, George W. Cory, Rose M. |
author_facet |
Ward, Collin P. Nalven, Sarah G. Crump, Byron C. Kling, George W. Cory, Rose M. |
author_sort |
Ward, Collin P. |
title |
Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
title_short |
Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
title_full |
Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
title_fullStr |
Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
title_full_unstemmed |
Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
title_sort |
photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration |
publisher |
Nature Publishing Group UK |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626735/ https://doi.org/10.1038/s41467-017-00759-2 |
geographic |
Arctic |
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Arctic |
genre |
Arctic Global warming permafrost |
genre_facet |
Arctic Global warming permafrost |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5626735/ http://dx.doi.org/10.1038/s41467-017-00759-2 |
op_rights |
© The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
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https://doi.org/10.1038/s41467-017-00759-2 |
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Nature Communications |
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