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Wildfire impacts on the carbon budget of a managed Nordic boreal forest

Julia Kelly Orcid Logo, Natascha Kljun Orcid Logo, Zhanzhang Cai Orcid Logo, Stefan Doerr Orcid Logo, Claudio D'Onofrio Orcid Logo, Thomas Holst, Irene Lehner Orcid Logo, Anders Lindroth, Shangharsha Thapa Orcid Logo, Patrik Vestin Orcid Logo, Cristina Santin Nuno

Agricultural and Forest Meteorology, Volume: 351, Start page: 110016

Swansea University Authors: Natascha Kljun Orcid Logo, Stefan Doerr Orcid Logo, Claudio D'Onofrio Orcid Logo, Cristina Santin Nuno

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DOI (Published version): 10.1016/j.agrformet.2024.110016

Abstract

Wildfire is one of the most important disturbances affecting boreal forests. Most previous research on boreal forest fires has occurred in North American forests which have different fire regimes, tree species and are less intensively managed than their Eurasian counterparts. Recent extreme fire yea...

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Published in: Agricultural and Forest Meteorology
ISSN: 0168-1923
Published: Elsevier BV 2024
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During the study period, both sites were net carbon sources at the annual scale. It took up to 4 years after the fire until the first day of net CO2 uptake was recorded at each site. We estimated that it will take 13 years (8, 21; mean ± 95 % confidence intervals) after the fire until the sites reach a neutral annual carbon balance. It will take up to 32 years (19, 53) at HY and 46 years (31, 70) at SLM to offset the carbon lost during and after the fire and salvage-logging. In addition, our measurements showed that more carbon was emitted in the first 4 years after the fire compared to the carbon lost from combustion during the fire. 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spelling v2 66707 2024-06-12 Wildfire impacts on the carbon budget of a managed Nordic boreal forest c96172d106206ba8c504317bb7887587 0000-0001-9650-2184 Natascha Kljun Natascha Kljun true false 575eb5094f2328249328b3e43deb5088 0000-0002-8700-9002 Stefan Doerr Stefan Doerr true false eb796674dfe9857999fe5394035f4868 0000-0002-1982-3889 Claudio D'Onofrio Claudio D'Onofrio true false 993c82cbaf875c1268156360e83c4dfd Cristina Santin Nuno Cristina Santin Nuno true false 2024-06-12 BGPS Wildfire is one of the most important disturbances affecting boreal forests. Most previous research on boreal forest fires has occurred in North American forests which have different fire regimes, tree species and are less intensively managed than their Eurasian counterparts. Recent extreme fire years have highlighted the vulnerability of the Nordic boreal forest to climatic shifts that are increasing forest fire frequency and severity. The Ljusdal fire (2018) was one of the largest wildfires in recorded history in Sweden. We established eddy covariance flux towers to track the impacts of this fire on the carbon balance of two Pinus sylvestris sites subject to different fire severities and forest management strategies 1–4 years post-fire. The ‘SLM’ site was a mature stand that experienced low-severity fire (trees survived) followed by salvage-logging and reseeding, whilst the ‘HY’ site was 10 years old when it experienced high-severity fire (all trees killed) then was replanted with seedlings. During the study period, both sites were net carbon sources at the annual scale. It took up to 4 years after the fire until the first day of net CO2 uptake was recorded at each site. We estimated that it will take 13 years (8, 21; mean ± 95 % confidence intervals) after the fire until the sites reach a neutral annual carbon balance. It will take up to 32 years (19, 53) at HY and 46 years (31, 70) at SLM to offset the carbon lost during and after the fire and salvage-logging. In addition, our measurements showed that more carbon was emitted in the first 4 years after the fire compared to the carbon lost from combustion during the fire. Quantifying carbon fluxes during the initial years after fire is therefore crucial for estimating the net impact of wildfire on the carbon budget of boreal forests. Journal Article Agricultural and Forest Meteorology 351 110016 Elsevier BV 0168-1923 Eddy covariance; Net ecosystem exchange; Forest fire; Salvage-logging; Forest management; Fennoscandia 15 5 2024 2024-05-15 10.1016/j.agrformet.2024.110016 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) FORMAS grants #2018–02700 and 2019–00836, the Crafoord foundation grant 20190763 2024-07-03T16:56:51.9859740 2024-06-12T08:17:37.4572142 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Julia Kelly 0000-0002-7370-1401 1 Natascha Kljun 0000-0001-9650-2184 2 Zhanzhang Cai 0000-0001-5883-4575 3 Stefan Doerr 0000-0002-8700-9002 4 Claudio D'Onofrio 0000-0002-1982-3889 5 Thomas Holst 6 Irene Lehner 0000-0002-2263-6734 7 Anders Lindroth 8 Shangharsha Thapa 0000-0002-0006-2960 9 Patrik Vestin 0000-0002-4731-8863 10 Cristina Santin Nuno 11 66707__30607__ae6dd3c7ee194499b267f58a75de33c0.pdf 2024_Kelly_C_budget_wildfire_boreal_AFM.pdf 2024-06-12T08:22:43.2624829 Output 15485184 application/pdf Version of Record true © 2024 The Authors. This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/
title Wildfire impacts on the carbon budget of a managed Nordic boreal forest
spellingShingle Wildfire impacts on the carbon budget of a managed Nordic boreal forest
Natascha Kljun
Stefan Doerr
Claudio D'Onofrio
Cristina Santin Nuno
title_short Wildfire impacts on the carbon budget of a managed Nordic boreal forest
title_full Wildfire impacts on the carbon budget of a managed Nordic boreal forest
title_fullStr Wildfire impacts on the carbon budget of a managed Nordic boreal forest
title_full_unstemmed Wildfire impacts on the carbon budget of a managed Nordic boreal forest
title_sort Wildfire impacts on the carbon budget of a managed Nordic boreal forest
author_id_str_mv c96172d106206ba8c504317bb7887587
575eb5094f2328249328b3e43deb5088
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author_id_fullname_str_mv c96172d106206ba8c504317bb7887587_***_Natascha Kljun
575eb5094f2328249328b3e43deb5088_***_Stefan Doerr
eb796674dfe9857999fe5394035f4868_***_Claudio D'Onofrio
993c82cbaf875c1268156360e83c4dfd_***_Cristina Santin Nuno
author Natascha Kljun
Stefan Doerr
Claudio D'Onofrio
Cristina Santin Nuno
author2 Julia Kelly
Natascha Kljun
Zhanzhang Cai
Stefan Doerr
Claudio D'Onofrio
Thomas Holst
Irene Lehner
Anders Lindroth
Shangharsha Thapa
Patrik Vestin
Cristina Santin Nuno
format Journal article
container_title Agricultural and Forest Meteorology
container_volume 351
container_start_page 110016
publishDate 2024
institution Swansea University
issn 0168-1923
doi_str_mv 10.1016/j.agrformet.2024.110016
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description Wildfire is one of the most important disturbances affecting boreal forests. Most previous research on boreal forest fires has occurred in North American forests which have different fire regimes, tree species and are less intensively managed than their Eurasian counterparts. Recent extreme fire years have highlighted the vulnerability of the Nordic boreal forest to climatic shifts that are increasing forest fire frequency and severity. The Ljusdal fire (2018) was one of the largest wildfires in recorded history in Sweden. We established eddy covariance flux towers to track the impacts of this fire on the carbon balance of two Pinus sylvestris sites subject to different fire severities and forest management strategies 1–4 years post-fire. The ‘SLM’ site was a mature stand that experienced low-severity fire (trees survived) followed by salvage-logging and reseeding, whilst the ‘HY’ site was 10 years old when it experienced high-severity fire (all trees killed) then was replanted with seedlings. During the study period, both sites were net carbon sources at the annual scale. It took up to 4 years after the fire until the first day of net CO2 uptake was recorded at each site. We estimated that it will take 13 years (8, 21; mean ± 95 % confidence intervals) after the fire until the sites reach a neutral annual carbon balance. It will take up to 32 years (19, 53) at HY and 46 years (31, 70) at SLM to offset the carbon lost during and after the fire and salvage-logging. In addition, our measurements showed that more carbon was emitted in the first 4 years after the fire compared to the carbon lost from combustion during the fire. Quantifying carbon fluxes during the initial years after fire is therefore crucial for estimating the net impact of wildfire on the carbon budget of boreal forests.
published_date 2024-05-15T16:56:50Z
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