Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau
Abstract Understanding the fate of permafrost‐derived dissolved organic matter (DOM) is critical for unraveling its role in carbon cycling. However, it remains unclear whether the high lability of permafrost‐derived DOM can be attributed to intrinsic chemical properties or elevated carbon concentrat...
Published in: | Limnology and Oceanography Letters |
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Online Access: | http://dx.doi.org/10.1002/lol2.10388 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10388 |
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crwiley:10.1002/lol2.10388 2024-06-23T07:56:02+00:00 Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau Wang, Yinghui Wang, Yasong Han, Lulu McKenna, Amy M. Kellerman, Anne M. Spencer, Robert G. M. Yang, Yuanhe Xu, Yunping National Key Research and Development Program of China Science and Technology Innovation Plan Of Shanghai Science and Technology Commission 2024 http://dx.doi.org/10.1002/lol2.10388 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10388 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography Letters ISSN 2378-2242 2378-2242 journal-article 2024 crwiley https://doi.org/10.1002/lol2.10388 2024-06-06T04:23:32Z Abstract Understanding the fate of permafrost‐derived dissolved organic matter (DOM) is critical for unraveling its role in carbon cycling. However, it remains unclear whether the high lability of permafrost‐derived DOM can be attributed to intrinsic chemical properties or elevated carbon concentrations. We investigated the dynamics of permafrost DOM from the Qinghai–Tibetan Plateau using both biodegradation and photodegradation experiments. Biodegradation and photodegradation of permafrost‐derived DOM exhibited distinct qualitative preferences for specific chemical groups (i.e., peptide‐like and aromatics, respectively). Notably, reducing the initial concentration of dissolved organic carbon (DOC) by half and a quarter resulted in shifts in biodegradable DOC content from 11.2% to 11.5% and 8.5%, respectively, accompanied by a corresponding decrease in the biodegradation rate from 0.11 to 0.06 and 0.03. This insight highlights the importance of recognizing the interplay between DOM quality and concentration and bears broader significance for our understanding of the fate of permafrost‐derived DOM in natural ecosystems. Article in Journal/Newspaper permafrost Wiley Online Library Limnology and Oceanography Letters |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Understanding the fate of permafrost‐derived dissolved organic matter (DOM) is critical for unraveling its role in carbon cycling. However, it remains unclear whether the high lability of permafrost‐derived DOM can be attributed to intrinsic chemical properties or elevated carbon concentrations. We investigated the dynamics of permafrost DOM from the Qinghai–Tibetan Plateau using both biodegradation and photodegradation experiments. Biodegradation and photodegradation of permafrost‐derived DOM exhibited distinct qualitative preferences for specific chemical groups (i.e., peptide‐like and aromatics, respectively). Notably, reducing the initial concentration of dissolved organic carbon (DOC) by half and a quarter resulted in shifts in biodegradable DOC content from 11.2% to 11.5% and 8.5%, respectively, accompanied by a corresponding decrease in the biodegradation rate from 0.11 to 0.06 and 0.03. This insight highlights the importance of recognizing the interplay between DOM quality and concentration and bears broader significance for our understanding of the fate of permafrost‐derived DOM in natural ecosystems. |
author2 |
National Key Research and Development Program of China Science and Technology Innovation Plan Of Shanghai Science and Technology Commission |
format |
Article in Journal/Newspaper |
author |
Wang, Yinghui Wang, Yasong Han, Lulu McKenna, Amy M. Kellerman, Anne M. Spencer, Robert G. M. Yang, Yuanhe Xu, Yunping |
spellingShingle |
Wang, Yinghui Wang, Yasong Han, Lulu McKenna, Amy M. Kellerman, Anne M. Spencer, Robert G. M. Yang, Yuanhe Xu, Yunping Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
author_facet |
Wang, Yinghui Wang, Yasong Han, Lulu McKenna, Amy M. Kellerman, Anne M. Spencer, Robert G. M. Yang, Yuanhe Xu, Yunping |
author_sort |
Wang, Yinghui |
title |
Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
title_short |
Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
title_full |
Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
title_fullStr |
Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
title_full_unstemmed |
Concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the Qinghai–Tibetan Plateau |
title_sort |
concentration and compositional controls on degradation of permafrost‐derived dissolved organic matter on the qinghai–tibetan plateau |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/lol2.10388 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10388 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Limnology and Oceanography Letters ISSN 2378-2242 2378-2242 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lol2.10388 |
container_title |
Limnology and Oceanography Letters |
_version_ |
1802648885408038912 |