Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland
Permafrost thaw is a major potential feedback source to climate change as it can drive the increased release of greenhouse gases carbon dioxide (CO(2)) and methane (CH(4)). This carbon release from the decomposition of thawing soil organic material can be mitigated by increased net primary productiv...
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2021
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298822/ http://www.ncbi.nlm.nih.gov/pubmed/34727401 https://doi.org/10.1111/gcb.15970 |
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ftpubmed:oai:pubmedcentral.nih.gov:9298822 2023-05-15T15:14:35+02:00 Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland Hough, Moira McCabe, Samantha Vining, S. Rose Pickering Pedersen, Emily Wilson, Rachel M. Lawrence, Ryan Chang, Kuang‐Yu Bohrer, Gil Riley, William J. Crill, Patrick M. Varner, Ruth K. Blazewicz, Steven J. Dorrepaal, Ellen Tfaily, Malak M. Saleska, Scott R. Rich, Virginia I. 2021-11-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298822/ http://www.ncbi.nlm.nih.gov/pubmed/34727401 https://doi.org/10.1111/gcb.15970 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298822/ http://www.ncbi.nlm.nih.gov/pubmed/34727401 http://dx.doi.org/10.1111/gcb.15970 © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. CC-BY-NC Glob Chang Biol Primary Research Articles Text 2021 ftpubmed https://doi.org/10.1111/gcb.15970 2022-07-31T02:17:23Z Permafrost thaw is a major potential feedback source to climate change as it can drive the increased release of greenhouse gases carbon dioxide (CO(2)) and methane (CH(4)). This carbon release from the decomposition of thawing soil organic material can be mitigated by increased net primary productivity (NPP) caused by warming, increasing atmospheric CO(2), and plant community transition. However, the net effect on C storage also depends on how these plant community changes alter plant litter quantity, quality, and decomposition rates. Predicting decomposition rates based on litter quality remains challenging, but a promising new way forward is to incorporate measures of the energetic favorability to soil microbes of plant biomass decomposition. We asked how the variation in one such measure, the nominal oxidation state of carbon (NOSC), interacts with changing quantities of plant material inputs to influence the net C balance of a thawing permafrost peatland. We found: (1) Plant productivity (NPP) increased post‐thaw, but instead of contributing to increased standing biomass, it increased plant biomass turnover via increased litter inputs to soil; (2) Plant litter thermodynamic favorability (NOSC) and decomposition rate both increased post‐thaw, despite limited changes in bulk C:N ratios; (3) these increases caused the higher NPP to cycle more rapidly through both plants and soil, contributing to higher CO(2) and CH(4) fluxes from decomposition. Thus, the increased C‐storage expected from higher productivity was limited and the high global warming potential of CH(4) contributed a net positive warming effect. Although post‐thaw peatlands are currently C sinks due to high NPP offsetting high CO(2) release, this status is very sensitive to the plant community's litter input rate and quality. Integration of novel bioavailability metrics based on litter chemistry, including NOSC, into studies of ecosystem dynamics, is needed to improve the understanding of controls on arctic C stocks under continued ecosystem ... Text Arctic Climate change Global warming permafrost PubMed Central (PMC) Arctic Global Change Biology 28 3 950 968 |
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Primary Research Articles Hough, Moira McCabe, Samantha Vining, S. Rose Pickering Pedersen, Emily Wilson, Rachel M. Lawrence, Ryan Chang, Kuang‐Yu Bohrer, Gil Riley, William J. Crill, Patrick M. Varner, Ruth K. Blazewicz, Steven J. Dorrepaal, Ellen Tfaily, Malak M. Saleska, Scott R. Rich, Virginia I. Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
topic_facet |
Primary Research Articles |
description |
Permafrost thaw is a major potential feedback source to climate change as it can drive the increased release of greenhouse gases carbon dioxide (CO(2)) and methane (CH(4)). This carbon release from the decomposition of thawing soil organic material can be mitigated by increased net primary productivity (NPP) caused by warming, increasing atmospheric CO(2), and plant community transition. However, the net effect on C storage also depends on how these plant community changes alter plant litter quantity, quality, and decomposition rates. Predicting decomposition rates based on litter quality remains challenging, but a promising new way forward is to incorporate measures of the energetic favorability to soil microbes of plant biomass decomposition. We asked how the variation in one such measure, the nominal oxidation state of carbon (NOSC), interacts with changing quantities of plant material inputs to influence the net C balance of a thawing permafrost peatland. We found: (1) Plant productivity (NPP) increased post‐thaw, but instead of contributing to increased standing biomass, it increased plant biomass turnover via increased litter inputs to soil; (2) Plant litter thermodynamic favorability (NOSC) and decomposition rate both increased post‐thaw, despite limited changes in bulk C:N ratios; (3) these increases caused the higher NPP to cycle more rapidly through both plants and soil, contributing to higher CO(2) and CH(4) fluxes from decomposition. Thus, the increased C‐storage expected from higher productivity was limited and the high global warming potential of CH(4) contributed a net positive warming effect. Although post‐thaw peatlands are currently C sinks due to high NPP offsetting high CO(2) release, this status is very sensitive to the plant community's litter input rate and quality. Integration of novel bioavailability metrics based on litter chemistry, including NOSC, into studies of ecosystem dynamics, is needed to improve the understanding of controls on arctic C stocks under continued ecosystem ... |
format |
Text |
author |
Hough, Moira McCabe, Samantha Vining, S. Rose Pickering Pedersen, Emily Wilson, Rachel M. Lawrence, Ryan Chang, Kuang‐Yu Bohrer, Gil Riley, William J. Crill, Patrick M. Varner, Ruth K. Blazewicz, Steven J. Dorrepaal, Ellen Tfaily, Malak M. Saleska, Scott R. Rich, Virginia I. |
author_facet |
Hough, Moira McCabe, Samantha Vining, S. Rose Pickering Pedersen, Emily Wilson, Rachel M. Lawrence, Ryan Chang, Kuang‐Yu Bohrer, Gil Riley, William J. Crill, Patrick M. Varner, Ruth K. Blazewicz, Steven J. Dorrepaal, Ellen Tfaily, Malak M. Saleska, Scott R. Rich, Virginia I. |
author_sort |
Hough, Moira |
title |
Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
title_short |
Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
title_full |
Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
title_fullStr |
Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
title_full_unstemmed |
Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland |
title_sort |
coupling plant litter quantity to a novel metric for litter quality explains c storage changes in a thawing permafrost peatland |
publisher |
John Wiley and Sons Inc. |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298822/ http://www.ncbi.nlm.nih.gov/pubmed/34727401 https://doi.org/10.1111/gcb.15970 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming permafrost |
genre_facet |
Arctic Climate change Global warming permafrost |
op_source |
Glob Chang Biol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9298822/ http://www.ncbi.nlm.nih.gov/pubmed/34727401 http://dx.doi.org/10.1111/gcb.15970 |
op_rights |
© 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1111/gcb.15970 |
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Global Change Biology |
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28 |
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3 |
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950 |
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968 |
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