Home About Browse Search
Svenska


Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil

Verbrigghe, Niel and Leblans, Niki I. W. and Sigurdsson, Bjarni D. and Vicca, Sara and Fang, Chao and Fuchslueger, Lucia and Soong, Jennifer L. and Weedon, James T. and Poeplau, Christopher and Ariza-Carricondo, Cristina and Bahn, Michael and Guenet, Bertrand and Gundersen, Per and Gunnarsdóttir, Gunnhildur and Kätterer, Thomas and Liu, Zhanfeng and Maljanen, Marja and Maranon-Jimenez, Sara and Meeran, Kathiravan and Oddsdottir, Edda S and Ostonen, Ivika and Penuelas, Josep and Richter, Andreas and Sardans, Jordi and Sigurdsson, Pall and Torn, Margaret S. and Van Bodegom, Peter M. and Verbruggen, Erik and Walker, Tom W. N. and Wallander, Hakan and Janssens, Ivan A. (2022). Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil. Biogeosciences. 19 :14 , 3381-3393
[Research article]

[img] PDF
3MB

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.

Authors/Creators:Verbrigghe, Niel and Leblans, Niki I. W. and Sigurdsson, Bjarni D. and Vicca, Sara and Fang, Chao and Fuchslueger, Lucia and Soong, Jennifer L. and Weedon, James T. and Poeplau, Christopher and Ariza-Carricondo, Cristina and Bahn, Michael and Guenet, Bertrand and Gundersen, Per and Gunnarsdóttir, Gunnhildur and Kätterer, Thomas and Liu, Zhanfeng and Maljanen, Marja and Maranon-Jimenez, Sara and Meeran, Kathiravan and Oddsdottir, Edda S and Ostonen, Ivika and Penuelas, Josep and Richter, Andreas and Sardans, Jordi and Sigurdsson, Pall and Torn, Margaret S. and Van Bodegom, Peter M. and Verbruggen, Erik and Walker, Tom W. N. and Wallander, Hakan and Janssens, Ivan A.
Title:Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil
Series Name/Journal:Biogeosciences
Year of publishing :2022
Volume:19
Number:14
Page range:3381-3393
Number of Pages:13
Publisher:COPERNICUS GESELLSCHAFT MBH
ISSN:1726-4170
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
URN:NBN:urn:nbn:se:slu:epsilon-p-118442
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118442
Additional ID:
Type of IDID
DOI10.5194/bg-19-3381-2022
Web of Science (WoS)000827461800001
ID Code:28524
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:23 Aug 2022 13:28
Metadata Last Modified:12 Sep 2022 21:21

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits