Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests
Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potentia...
Ausführliche Beschreibung
Autor*in: |
Bill, Kristen E. [verfasserIn] |
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Englisch |
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2023 |
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Anmerkung: |
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Übergeordnetes Werk: |
Enthalten in: Ecosystems - Springer-Verlag, 2000, 26(2023), 8 vom: 22. Juni, Seite 1623-1639 |
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Übergeordnetes Werk: |
volume:26 ; year:2023 ; number:8 ; day:22 ; month:06 ; pages:1623-1639 |
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DOI / URN: |
10.1007/s10021-023-00854-0 |
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520 | |a Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract | ||
650 | 4 | |a boreal forest resilience |7 (dpeaa)DE-He213 | |
650 | 4 | |a ecosystem carbon dynamics |7 (dpeaa)DE-He213 | |
650 | 4 | |a post-fire recovery |7 (dpeaa)DE-He213 | |
650 | 4 | |a soil organic layer |7 (dpeaa)DE-He213 | |
650 | 4 | |a soil organic carbon |7 (dpeaa)DE-He213 | |
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700 | 1 | |a Mack, Michelle C. |4 aut | |
700 | 1 | |a Day, Nicola J. |4 aut | |
700 | 1 | |a Cumming, Steve G. |4 aut | |
700 | 1 | |a Walker, Xanthe J. |4 aut | |
700 | 1 | |a Turetsky, Merritt R. |4 aut | |
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10.1007/s10021-023-00854-0 doi (DE-627)SPR054081653 (SPR)s10021-023-00854-0-e DE-627 ger DE-627 rakwb eng Bill, Kristen E. verfasserin aut Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract boreal forest resilience (dpeaa)DE-He213 ecosystem carbon dynamics (dpeaa)DE-He213 post-fire recovery (dpeaa)DE-He213 soil organic layer (dpeaa)DE-He213 soil organic carbon (dpeaa)DE-He213 wildfire (dpeaa)DE-He213 Dieleman, Catherine M. aut Baltzer, Jennifer L. aut Degré-Timmons, Geneviève É. aut Mack, Michelle C. aut Day, Nicola J. aut Cumming, Steve G. aut Walker, Xanthe J. aut Turetsky, Merritt R. aut Enthalten in Ecosystems Springer-Verlag, 2000 26(2023), 8 vom: 22. Juni, Seite 1623-1639 (DE-627)SPR008072272 nnns volume:26 year:2023 number:8 day:22 month:06 pages:1623-1639 https://dx.doi.org/10.1007/s10021-023-00854-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 26 2023 8 22 06 1623-1639 |
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10.1007/s10021-023-00854-0 doi (DE-627)SPR054081653 (SPR)s10021-023-00854-0-e DE-627 ger DE-627 rakwb eng Bill, Kristen E. verfasserin aut Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract boreal forest resilience (dpeaa)DE-He213 ecosystem carbon dynamics (dpeaa)DE-He213 post-fire recovery (dpeaa)DE-He213 soil organic layer (dpeaa)DE-He213 soil organic carbon (dpeaa)DE-He213 wildfire (dpeaa)DE-He213 Dieleman, Catherine M. aut Baltzer, Jennifer L. aut Degré-Timmons, Geneviève É. aut Mack, Michelle C. aut Day, Nicola J. aut Cumming, Steve G. aut Walker, Xanthe J. aut Turetsky, Merritt R. aut Enthalten in Ecosystems Springer-Verlag, 2000 26(2023), 8 vom: 22. Juni, Seite 1623-1639 (DE-627)SPR008072272 nnns volume:26 year:2023 number:8 day:22 month:06 pages:1623-1639 https://dx.doi.org/10.1007/s10021-023-00854-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 26 2023 8 22 06 1623-1639 |
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10.1007/s10021-023-00854-0 doi (DE-627)SPR054081653 (SPR)s10021-023-00854-0-e DE-627 ger DE-627 rakwb eng Bill, Kristen E. verfasserin aut Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract boreal forest resilience (dpeaa)DE-He213 ecosystem carbon dynamics (dpeaa)DE-He213 post-fire recovery (dpeaa)DE-He213 soil organic layer (dpeaa)DE-He213 soil organic carbon (dpeaa)DE-He213 wildfire (dpeaa)DE-He213 Dieleman, Catherine M. aut Baltzer, Jennifer L. aut Degré-Timmons, Geneviève É. aut Mack, Michelle C. aut Day, Nicola J. aut Cumming, Steve G. aut Walker, Xanthe J. aut Turetsky, Merritt R. aut Enthalten in Ecosystems Springer-Verlag, 2000 26(2023), 8 vom: 22. Juni, Seite 1623-1639 (DE-627)SPR008072272 nnns volume:26 year:2023 number:8 day:22 month:06 pages:1623-1639 https://dx.doi.org/10.1007/s10021-023-00854-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 26 2023 8 22 06 1623-1639 |
allfieldsGer |
10.1007/s10021-023-00854-0 doi (DE-627)SPR054081653 (SPR)s10021-023-00854-0-e DE-627 ger DE-627 rakwb eng Bill, Kristen E. verfasserin aut Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract boreal forest resilience (dpeaa)DE-He213 ecosystem carbon dynamics (dpeaa)DE-He213 post-fire recovery (dpeaa)DE-He213 soil organic layer (dpeaa)DE-He213 soil organic carbon (dpeaa)DE-He213 wildfire (dpeaa)DE-He213 Dieleman, Catherine M. aut Baltzer, Jennifer L. aut Degré-Timmons, Geneviève É. aut Mack, Michelle C. aut Day, Nicola J. aut Cumming, Steve G. aut Walker, Xanthe J. aut Turetsky, Merritt R. aut Enthalten in Ecosystems Springer-Verlag, 2000 26(2023), 8 vom: 22. Juni, Seite 1623-1639 (DE-627)SPR008072272 nnns volume:26 year:2023 number:8 day:22 month:06 pages:1623-1639 https://dx.doi.org/10.1007/s10021-023-00854-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 26 2023 8 22 06 1623-1639 |
allfieldsSound |
10.1007/s10021-023-00854-0 doi (DE-627)SPR054081653 (SPR)s10021-023-00854-0-e DE-627 ger DE-627 rakwb eng Bill, Kristen E. verfasserin aut Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract boreal forest resilience (dpeaa)DE-He213 ecosystem carbon dynamics (dpeaa)DE-He213 post-fire recovery (dpeaa)DE-He213 soil organic layer (dpeaa)DE-He213 soil organic carbon (dpeaa)DE-He213 wildfire (dpeaa)DE-He213 Dieleman, Catherine M. aut Baltzer, Jennifer L. aut Degré-Timmons, Geneviève É. aut Mack, Michelle C. aut Day, Nicola J. aut Cumming, Steve G. aut Walker, Xanthe J. aut Turetsky, Merritt R. aut Enthalten in Ecosystems Springer-Verlag, 2000 26(2023), 8 vom: 22. Juni, Seite 1623-1639 (DE-627)SPR008072272 nnns volume:26 year:2023 number:8 day:22 month:06 pages:1623-1639 https://dx.doi.org/10.1007/s10021-023-00854-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 26 2023 8 22 06 1623-1639 |
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. 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Bill, Kristen E. Dieleman, Catherine M. Baltzer, Jennifer L. Degré-Timmons, Geneviève É. Mack, Michelle C. Day, Nicola J. Cumming, Steve G. Walker, Xanthe J. Turetsky, Merritt R. |
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post-fire recovery of soil organic layer carbon in canadian boreal forests |
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Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests |
abstract |
Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
abstractGer |
Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
abstract_unstemmed |
Conifer forests historically have been resilient to wildfires in part due to thick organic soil layers that regulate combustion and post-fire moisture and vegetation change. However, recent shifts in fire activity in western North America may be overwhelming these resilience mechanisms with potential impacts for energy and carbon exchange. Here, we quantify the long-term recovery of the organic soil layer and its carbon pools across 511 forested plots. Our plots span ~ 140,000 $ km^{2} $ across two ecozones of the Northwest Territories, Canada, and allowed us to investigate the impacts of time-after-fire, site moisture class, and dominant canopy type on soil organic layer thickness and associated carbon stocks. Despite thinner soil organic layers in xeric plots immediately after fire, these drier stands supported faster post-fire recovery of the soil organic layer than in mesic plots. Unlike xeric or mesic stands, post-fire soil carbon accumulation rates in hydric plots were negligible despite wetter forested plots having greater soil organic carbon stocks immediately post-fire compared to other stands. While permafrost and high-water tables inhibit combustion and maintain thick organic soils immediately after fire, our results suggest that these wet stands are not recovering their pre-fire carbon stocks on a century timescale. We show that canopy conversion from black spruce to jack pine or deciduous dominance could reduce organic soil carbon stocks by 60–80% depending on stand age. Our two main findings—decreasing organic soil carbon storage with increasing deciduous cover and the lack of post-fire SOL recovery in hydric sites—have implications for the turnover time of carbon stocks in the western boreal forest region and also will impact energy fluxes by controlling albedo and surface soil moisture. Graphical Abstract © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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Post-fire Recovery of Soil Organic Layer Carbon in Canadian Boreal Forests |
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