Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil
Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils ( Ilyina and Friedlingstein , 2016 Shi et al. , 2018 ) . Using natural geothermal soil warming gradients of up to +6.4 ∘ C in su...
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2022
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ftdoajarticles:oai:doaj.org/article:1408680585f74d2881ec5662451706b7 2023-05-15T18:28:14+02:00 Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil N. Verbrigghe N. I. W. Leblans B. D. Sigurdsson S. Vicca C. Fang L. Fuchslueger J. L. Soong J. T. Weedon C. Poeplau C. Ariza-Carricondo M. Bahn B. Guenet P. Gundersen G. E. Gunnarsdóttir T. Kätterer Z. Liu M. Maljanen S. Marañón-Jiménez K. Meeran E. S. Oddsdóttir I. Ostonen J. Peñuelas A. Richter J. Sardans P. Sigurðsson M. S. Torn P. M. Van Bodegom E. Verbruggen T. W. N. Walker H. Wallander I. A. Janssens 2022-07-01T00:00:00Z https://doi.org/10.5194/bg-19-3381-2022 https://doaj.org/article/1408680585f74d2881ec5662451706b7 EN eng Copernicus Publications https://bg.copernicus.org/articles/19/3381/2022/bg-19-3381-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-3381-2022 1726-4170 1726-4189 https://doaj.org/article/1408680585f74d2881ec5662451706b7 Biogeosciences, Vol 19, Pp 3381-3393 (2022) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/bg-19-3381-2022 2022-12-30T23:17:03Z Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils ( Ilyina and Friedlingstein , 2016 Shi et al. , 2018 ) . Using natural geothermal soil warming gradients of up to +6.4 ∘ C in subarctic grasslands ( Sigurdsson et al. , 2016 ) , we show that soil organic carbon (SOC) stocks decline strongly and linearly with warming ( −2.8 t ha −1 ∘ C −1 ). Comparison of SOC stock changes following medium-term (5 and 10 years) and long-term ( >50 years) warming revealed that all SOC stock reduction occurred within the first 5 years of warming, after which continued warming no longer reduced SOC stocks. This rapid equilibration of SOC observed in Andosol suggests a critical role for ecosystem adaptations to warming and could imply short-lived soil carbon–climate feedbacks. Our data further revealed that the soil C loss occurred in all aggregate size fractions and that SOC stock reduction was only visible in topsoil (0–10 cm). SOC stocks in subsoil (10–30 cm), where plant roots were absent, showed apparent conservation after >50 years of warming. The observed depth-dependent warming responses indicate that explicit vertical resolution is a prerequisite for global models to accurately project future SOC stocks for this soil type and should be investigated for soils with other mineralogies. Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles Biogeosciences 19 14 3381 3393 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 N. Verbrigghe N. I. W. Leblans B. D. Sigurdsson S. Vicca C. Fang L. Fuchslueger J. L. Soong J. T. Weedon C. Poeplau C. Ariza-Carricondo M. Bahn B. Guenet P. Gundersen G. E. Gunnarsdóttir T. Kätterer Z. Liu M. Maljanen S. Marañón-Jiménez K. Meeran E. S. Oddsdóttir I. Ostonen J. Peñuelas A. Richter J. Sardans P. Sigurðsson M. S. Torn P. M. Van Bodegom E. Verbruggen T. W. N. Walker H. Wallander I. A. Janssens Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils ( Ilyina and Friedlingstein , 2016 Shi et al. , 2018 ) . Using natural geothermal soil warming gradients of up to +6.4 ∘ C in subarctic grasslands ( Sigurdsson et al. , 2016 ) , we show that soil organic carbon (SOC) stocks decline strongly and linearly with warming ( −2.8 t ha −1 ∘ C −1 ). Comparison of SOC stock changes following medium-term (5 and 10 years) and long-term ( >50 years) warming revealed that all SOC stock reduction occurred within the first 5 years of warming, after which continued warming no longer reduced SOC stocks. This rapid equilibration of SOC observed in Andosol suggests a critical role for ecosystem adaptations to warming and could imply short-lived soil carbon–climate feedbacks. Our data further revealed that the soil C loss occurred in all aggregate size fractions and that SOC stock reduction was only visible in topsoil (0–10 cm). SOC stocks in subsoil (10–30 cm), where plant roots were absent, showed apparent conservation after >50 years of warming. The observed depth-dependent warming responses indicate that explicit vertical resolution is a prerequisite for global models to accurately project future SOC stocks for this soil type and should be investigated for soils with other mineralogies. |
format |
Article in Journal/Newspaper |
author |
N. Verbrigghe N. I. W. Leblans B. D. Sigurdsson S. Vicca C. Fang L. Fuchslueger J. L. Soong J. T. Weedon C. Poeplau C. Ariza-Carricondo M. Bahn B. Guenet P. Gundersen G. E. Gunnarsdóttir T. Kätterer Z. Liu M. Maljanen S. Marañón-Jiménez K. Meeran E. S. Oddsdóttir I. Ostonen J. Peñuelas A. Richter J. Sardans P. Sigurðsson M. S. Torn P. M. Van Bodegom E. Verbruggen T. W. N. Walker H. Wallander I. A. Janssens |
author_facet |
N. Verbrigghe N. I. W. Leblans B. D. Sigurdsson S. Vicca C. Fang L. Fuchslueger J. L. Soong J. T. Weedon C. Poeplau C. Ariza-Carricondo M. Bahn B. Guenet P. Gundersen G. E. Gunnarsdóttir T. Kätterer Z. Liu M. Maljanen S. Marañón-Jiménez K. Meeran E. S. Oddsdóttir I. Ostonen J. Peñuelas A. Richter J. Sardans P. Sigurðsson M. S. Torn P. M. Van Bodegom E. Verbruggen T. W. N. Walker H. Wallander I. A. Janssens |
author_sort |
N. Verbrigghe |
title |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_short |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_full |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_fullStr |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_full_unstemmed |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_sort |
soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-3381-2022 https://doaj.org/article/1408680585f74d2881ec5662451706b7 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Biogeosciences, Vol 19, Pp 3381-3393 (2022) |
op_relation |
https://bg.copernicus.org/articles/19/3381/2022/bg-19-3381-2022.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-19-3381-2022 1726-4170 1726-4189 https://doaj.org/article/1408680585f74d2881ec5662451706b7 |
op_doi |
https://doi.org/10.5194/bg-19-3381-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
14 |
container_start_page |
3381 |
op_container_end_page |
3393 |
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