Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest
Fires are an important perturbation for the carbon (C) dynamics of boreal forests, especially when they are stand-replacing. In North American boreal forests, crown fires are predominant and, therefore, the most studied. However, surface fires can also lead to major tree mortality with substantial i...
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crcansciencepubl:10.1139/cjfr-2021-0354 2024-05-19T07:46:17+00:00 Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest Ribeiro-Kumara, Caius Santín, Cristina Doerr, Stefan H. Pumpanen, Jukka Baxter, Greg Köster, Kajar 2022 http://dx.doi.org/10.1139/cjfr-2021-0354 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfr-2021-0354 https://cdnsciencepub.com/doi/pdf/10.1139/cjfr-2021-0354 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 52, issue 4, page 591-604 ISSN 0045-5067 1208-6037 journal-article 2022 crcansciencepubl https://doi.org/10.1139/cjfr-2021-0354 2024-05-02T06:51:27Z Fires are an important perturbation for the carbon (C) dynamics of boreal forests, especially when they are stand-replacing. In North American boreal forests, crown fires are predominant and, therefore, the most studied. However, surface fires can also lead to major tree mortality with substantial implications for the C balance. Here, we assess the short- (hours to days) to medium-term (1–3 years) effects of the different fire types (surface vs. crown) on the postfire soil C effluxes in jack pine (Pinus banksiana Lamb.) and black spruce (Picea mariana (Mill.) BSP) forest stands in the Northwest Territories, Canada. We found that while trees were instantly killed by the four crown fires studied, trees also died within 1 year after two of three surface fires studied. Associated with this tree mortality, soil autotrophic respiration decreased after both fire types, although at different timings. The soil heterotrophic respiration was either lower or unchanged when measured 1–3 years after either fire type but was increased when measured immediately after a surface fire, possibly due to the interaction between ash generation and wetting performed to suppress the fire. Our results suggest that both fire types can thus substantially alter C fluxes in the short to medium term, both through changes in vegetation and the soil environment. Article in Journal/Newspaper Northwest Territories Canadian Science Publishing Canadian Journal of Forest Research |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Fires are an important perturbation for the carbon (C) dynamics of boreal forests, especially when they are stand-replacing. In North American boreal forests, crown fires are predominant and, therefore, the most studied. However, surface fires can also lead to major tree mortality with substantial implications for the C balance. Here, we assess the short- (hours to days) to medium-term (1–3 years) effects of the different fire types (surface vs. crown) on the postfire soil C effluxes in jack pine (Pinus banksiana Lamb.) and black spruce (Picea mariana (Mill.) BSP) forest stands in the Northwest Territories, Canada. We found that while trees were instantly killed by the four crown fires studied, trees also died within 1 year after two of three surface fires studied. Associated with this tree mortality, soil autotrophic respiration decreased after both fire types, although at different timings. The soil heterotrophic respiration was either lower or unchanged when measured 1–3 years after either fire type but was increased when measured immediately after a surface fire, possibly due to the interaction between ash generation and wetting performed to suppress the fire. Our results suggest that both fire types can thus substantially alter C fluxes in the short to medium term, both through changes in vegetation and the soil environment. |
format |
Article in Journal/Newspaper |
author |
Ribeiro-Kumara, Caius Santín, Cristina Doerr, Stefan H. Pumpanen, Jukka Baxter, Greg Köster, Kajar |
spellingShingle |
Ribeiro-Kumara, Caius Santín, Cristina Doerr, Stefan H. Pumpanen, Jukka Baxter, Greg Köster, Kajar Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
author_facet |
Ribeiro-Kumara, Caius Santín, Cristina Doerr, Stefan H. Pumpanen, Jukka Baxter, Greg Köster, Kajar |
author_sort |
Ribeiro-Kumara, Caius |
title |
Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
title_short |
Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
title_full |
Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
title_fullStr |
Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
title_full_unstemmed |
Short- to medium-term effects of crown and surface fires on soil respiration in a Canadian boreal forest |
title_sort |
short- to medium-term effects of crown and surface fires on soil respiration in a canadian boreal forest |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/cjfr-2021-0354 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfr-2021-0354 https://cdnsciencepub.com/doi/pdf/10.1139/cjfr-2021-0354 |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Canadian Journal of Forest Research volume 52, issue 4, page 591-604 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfr-2021-0354 |
container_title |
Canadian Journal of Forest Research |
_version_ |
1799486435669049344 |