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Climate warming and elevated CO(2) alter peatland soil carbon sources and stability

Peatlands are an important carbon (C) reservoir storing one-third of global soil organic carbon (SOC), but little is known about the fate of these C stocks under climate change. Here, we examine the impact of warming and elevated atmospheric CO(2) concentration (eCO(2)) on the molecular composition...

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Autores principales: Ofiti, Nicholas O. E., Schmidt, Michael W. I., Abiven, Samuel, Hanson, Paul J., Iversen, Colleen M., Wilson, Rachel M., Kostka, Joel E., Wiesenberg, Guido L. B., Malhotra, Avni
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10662476/
https://www.ncbi.nlm.nih.gov/pubmed/37985767
http://dx.doi.org/10.1038/s41467-023-43410-z
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author Ofiti, Nicholas O. E.
Schmidt, Michael W. I.
Abiven, Samuel
Hanson, Paul J.
Iversen, Colleen M.
Wilson, Rachel M.
Kostka, Joel E.
Wiesenberg, Guido L. B.
Malhotra, Avni
author_facet Ofiti, Nicholas O. E.
Schmidt, Michael W. I.
Abiven, Samuel
Hanson, Paul J.
Iversen, Colleen M.
Wilson, Rachel M.
Kostka, Joel E.
Wiesenberg, Guido L. B.
Malhotra, Avni
author_sort Ofiti, Nicholas O. E.
collection PubMed
description Peatlands are an important carbon (C) reservoir storing one-third of global soil organic carbon (SOC), but little is known about the fate of these C stocks under climate change. Here, we examine the impact of warming and elevated atmospheric CO(2) concentration (eCO(2)) on the molecular composition of SOC to infer SOC sources (microbe-, plant- and fire-derived) and stability in a boreal peatland. We show that while warming alone decreased plant- and microbe-derived SOC due to enhanced decomposition, warming combined with eCO(2) increased plant-derived SOC compounds. We further observed increasing root-derived inputs (suberin) and declining leaf/needle-derived inputs (cutin) into SOC under warming and eCO(2). The decline in SOC compounds with warming and gains from new root-derived C under eCO(2), suggest that warming and eCO(2) may shift peatland C budget towards pools with faster turnover. Together, our results indicate that climate change may increase inputs and enhance decomposition of SOC potentially destabilising C storage in peatlands.
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spelling pubmed-106624762023-11-20 Climate warming and elevated CO(2) alter peatland soil carbon sources and stability Ofiti, Nicholas O. E. Schmidt, Michael W. I. Abiven, Samuel Hanson, Paul J. Iversen, Colleen M. Wilson, Rachel M. Kostka, Joel E. Wiesenberg, Guido L. B. Malhotra, Avni Nat Commun Article Peatlands are an important carbon (C) reservoir storing one-third of global soil organic carbon (SOC), but little is known about the fate of these C stocks under climate change. Here, we examine the impact of warming and elevated atmospheric CO(2) concentration (eCO(2)) on the molecular composition of SOC to infer SOC sources (microbe-, plant- and fire-derived) and stability in a boreal peatland. We show that while warming alone decreased plant- and microbe-derived SOC due to enhanced decomposition, warming combined with eCO(2) increased plant-derived SOC compounds. We further observed increasing root-derived inputs (suberin) and declining leaf/needle-derived inputs (cutin) into SOC under warming and eCO(2). The decline in SOC compounds with warming and gains from new root-derived C under eCO(2), suggest that warming and eCO(2) may shift peatland C budget towards pools with faster turnover. Together, our results indicate that climate change may increase inputs and enhance decomposition of SOC potentially destabilising C storage in peatlands. Nature Publishing Group UK 2023-11-20 /pmc/articles/PMC10662476/ /pubmed/37985767 http://dx.doi.org/10.1038/s41467-023-43410-z 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
Ofiti, Nicholas O. E.
Schmidt, Michael W. I.
Abiven, Samuel
Hanson, Paul J.
Iversen, Colleen M.
Wilson, Rachel M.
Kostka, Joel E.
Wiesenberg, Guido L. B.
Malhotra, Avni
Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title_full Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title_fullStr Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title_full_unstemmed Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title_short Climate warming and elevated CO(2) alter peatland soil carbon sources and stability
title_sort climate warming and elevated co(2) alter peatland soil carbon sources and stability
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10662476/
https://www.ncbi.nlm.nih.gov/pubmed/37985767
http://dx.doi.org/10.1038/s41467-023-43410-z
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