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Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes

Photochemical and biological degradation of dissolved organic carbon (DOC) and their interactions jointly contribute to the carbon dioxide released from surface waters in permafrost regions. However, the mechanisms that govern the coupled photochemical and biological degradation of DOC are still poo...

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Autores principales: Hu, Jie, Kang, Luyao, Li, Ziliang, Feng, Xuehui, Liang, Caifan, Wu, Zan, Zhou, Wei, Liu, Xuning, Yang, Yuanhe, Chen, Leiyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10284890/
https://www.ncbi.nlm.nih.gov/pubmed/37344478
http://dx.doi.org/10.1038/s41467-023-39432-2
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author Hu, Jie
Kang, Luyao
Li, Ziliang
Feng, Xuehui
Liang, Caifan
Wu, Zan
Zhou, Wei
Liu, Xuning
Yang, Yuanhe
Chen, Leiyi
author_facet Hu, Jie
Kang, Luyao
Li, Ziliang
Feng, Xuehui
Liang, Caifan
Wu, Zan
Zhou, Wei
Liu, Xuning
Yang, Yuanhe
Chen, Leiyi
author_sort Hu, Jie
collection PubMed
description Photochemical and biological degradation of dissolved organic carbon (DOC) and their interactions jointly contribute to the carbon dioxide released from surface waters in permafrost regions. However, the mechanisms that govern the coupled photochemical and biological degradation of DOC are still poorly understood in thermokarst lakes. Here, by combining Fourier transform ion cyclotron resonance mass spectrometry and microbial high-throughput sequencing, we conducted a sunlight and microbial degradation experiment using water samples collected from 10 thermokarst lakes along a 1100-km permafrost transect. We demonstrate that the enhancement of sunlight on DOC biodegradation is not associated with the low molecular weight aliphatics produced by sunlight, but driven by the photo-produced aromatics. This aromatic compound-driven acceleration of biodegradation may be attributed to the potential high abilities of the microbes to decompose complex compounds in thermokarst lakes. These findings highlight the importance of aromatics in regulating the sunlight effects on DOC biodegradation in permafrost-affected lakes.
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spelling pubmed-102848902023-06-23 Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes Hu, Jie Kang, Luyao Li, Ziliang Feng, Xuehui Liang, Caifan Wu, Zan Zhou, Wei Liu, Xuning Yang, Yuanhe Chen, Leiyi Nat Commun Article Photochemical and biological degradation of dissolved organic carbon (DOC) and their interactions jointly contribute to the carbon dioxide released from surface waters in permafrost regions. However, the mechanisms that govern the coupled photochemical and biological degradation of DOC are still poorly understood in thermokarst lakes. Here, by combining Fourier transform ion cyclotron resonance mass spectrometry and microbial high-throughput sequencing, we conducted a sunlight and microbial degradation experiment using water samples collected from 10 thermokarst lakes along a 1100-km permafrost transect. We demonstrate that the enhancement of sunlight on DOC biodegradation is not associated with the low molecular weight aliphatics produced by sunlight, but driven by the photo-produced aromatics. This aromatic compound-driven acceleration of biodegradation may be attributed to the potential high abilities of the microbes to decompose complex compounds in thermokarst lakes. These findings highlight the importance of aromatics in regulating the sunlight effects on DOC biodegradation in permafrost-affected lakes. Nature Publishing Group UK 2023-06-21 /pmc/articles/PMC10284890/ /pubmed/37344478 http://dx.doi.org/10.1038/s41467-023-39432-2 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Hu, Jie
Kang, Luyao
Li, Ziliang
Feng, Xuehui
Liang, Caifan
Wu, Zan
Zhou, Wei
Liu, Xuning
Yang, Yuanhe
Chen, Leiyi
Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title_full Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title_fullStr Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title_full_unstemmed Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title_short Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
title_sort photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10284890/
https://www.ncbi.nlm.nih.gov/pubmed/37344478
http://dx.doi.org/10.1038/s41467-023-39432-2
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