Soil respiration at mean annual temperature predicts annual total across vegetation types and biomes
2010
Bahn, Michael | Reichstein, M. | Davidson, E.A. | Grünzweig, J. | Jung, M. | Carbone, M.S. | Epron, Daniel, D. | Misson, Laurent | Nouvellon, Yann | Roupsard, Olivier | Savage, K. | Trumbore, S.E. | Gimeno, C. | Curiel Yuste, J. | Tang, J. | Vargas, R. | Janssens, Ivan | Institute of Ecology ; Leopold Franzens Universität Innsbruck - University of Innsbruck | Max Planck Institute for Biogeochemistry (MPI-BGC) ; Max-Planck-Gesellschaft | Woods Hole Research Center ; Partenaires INRAE | The Hebrew University of Jerusalem (HUJ) | University of California (UC) | Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) ; Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (CRDPI) | Centro Agronomico Tropical de Investigacion y Enseñanza (CATIE) | Centro de Estudios Ambientales del Mediterraneo | Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona (UAB) | Marine Biological Laboratory | University of California [Berkeley] (UC Berkeley) ; University of California (UC) | Department of Biology ; University of Antwerp (UA) | Austrian Science Fund (FWF) P18756-B16 ; European Research Council ERC-2007-StG-208516
International audience
显示更多 [+] 显示较少 [-]英语. Soil respiration (SR) constitutes the largest flux of CO2 from terrestrial ecosystems to the atmosphere. However, there still exist considerable uncertainties as to its actual magnitude, as well as its spatial and interannual variability. Based on a reanalysis and synthesis of 80 site-years for 57 forests, plantations, savannas, shrublands and grasslands from boreal to tropical climates we present evidence that total annual SR is closely related to SR at mean annual soil temperature (SRMAT), irrespective of the type of ecosystem and biome. This is theoretically expected for non water-limited ecosystems within most of the globally occurring range of annual temperature variability and sensitivity (Q10). We further show that for seasonally dry sites where annual precipitation (P) is lower than potential evapotranspiration (PET), annual SR can be predicted from wet season SRMAT corrected for a factor related to P/PET. Our finding indicates that it can be sufficient to measure SRMAT for obtaining a well constrained estimate of its annual total. This should substantially increase our capacity for assessing the spatial distribution of soil CO2 emissions across ecosystems, landscapes and regions, and thereby contribute to improving the spatial resolution of a major component of the global carbon cycle.
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