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Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil
- Source :
- Verbrigghe , N , Leblans , N I W , Sigurdsson , B D , Vicca , S , Fang , C , Fuchslueger , L , Soong , J L , Weedon , J T , Poeplau , C , Ariza-Carricondo , C , Bahn , M , Guenet , B , Gundersen , P , Gunnarsdóttir , G E , Kätterer , T , Liu , Z , Maljanen , M , Marañón-Jiménez , S , Meeran , K , Oddsdóttir , E S , Ostonen , I , Peñuelas , J , Richter , A , Sardans , J , Sigurðsson , P , Torn , M S , Van Bodegom , P M , Verbruggen , E , Walker , T W N , Wallander , H & Janssens , I A 2022 , ' Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil ' , Biogeosciences , vol. 19 , no. 14 , pp. 3381-3393 .
- Publication Year :
- 2022
-
Abstract
- 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 degrees 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) degrees 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.
Details
- Database :
- OAIster
- Journal :
- Verbrigghe , N , Leblans , N I W , Sigurdsson , B D , Vicca , S , Fang , C , Fuchslueger , L , Soong , J L , Weedon , J T , Poeplau , C , Ariza-Carricondo , C , Bahn , M , Guenet , B , Gundersen , P , Gunnarsdóttir , G E , Kätterer , T , Liu , Z , Maljanen , M , Marañón-Jiménez , S , Meeran , K , Oddsdóttir , E S , Ostonen , I , Peñuelas , J , Richter , A , Sardans , J , Sigurðsson , P , Torn , M S , Van Bodegom , P M , Verbruggen , E , Walker , T W N , Wallander , H & Janssens , I A 2022 , ' Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil ' , Biogeosciences , vol. 19 , no. 14 , pp. 3381-3393 .
- Notes :
- Verbrigghe, Niel, Leblans, Niki I. W., Sigurdsson, Bjarni D., Vicca, Sara, Fang, Chao, Fuchslueger, Lucia, Soong, Jennifer L., Weedon, James T., Poeplau, Christopher, Ariza-Carricondo, Cristina, Bahn, Michael, Guenet, Bertrand, Gundersen, Per, Gunnarsdóttir, Gunnhildur E., Kätterer, Thomas, Liu, Zhanfeng, Maljanen, Marja, Marañón-Jiménez, Sara, Meeran, Kathiravan, Oddsdóttir, Edda S., Ostonen, Ivika, Peñuelas, Josep, Richter, Andreas, Sardans, Jordi, Sigurðsson, Páll, Torn, Margaret S., Van Bodegom, Peter M., Verbruggen, Erik, Walker, Tom W. N., Wallander, Håkan, Janssens, Ivan A.
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1349070908
- Document Type :
- Electronic Resource