Per citar aquest document: http://ddd.uab.cat/record/131597
Can current moisture responses predict soil CO₂ efflux under altered precipitation regimes? A synthesis of manipulation experiments
Vicca, S. (Universiteit Antwerpen. Departement Biologie)
Bahn, M. (Universität Innsbruck. Institut für Ökologie)
Estiarte, Marc (Centre de Recerca Ecològica i Aplicacions Forestals)
Loon, E. E. van (Universiteit van Amsterdam. Institute for Biodiversity and Ecosystem Dynamics)
Vargas, R. (University of Delaware. Department of Plant and Soil Sciences)
Alberti, G. (Università di Udine)
Ambus, P (Danmarks tekniske universitet. Institut for Kemisk og Biokemisk Teknologi)
Arain, M. A. (McMaster Centre for Climate Change)
Beier, Claus (Norsk institutt for vannforskning)
Bentley, L. P. (Texas Tech University. Department of Biological Sciences)
Borken, W. (Universität Bayreuth. Lehrstuhl für Bodenökologie)
Buchmann, N. (Eidgenössischen Technischen Hochschule Zürich. Institut für Umweltsystemwissenschaften)
Collins, S. L. (University of New Mexico. Biology Department)
De Dato, G. (Università degli studi della Tuscia di Viterbo. Dipartimento per l'Innovazione nei sistemi Biologici, Agro-alimentari e. Forestali)
Dukes, Jeffrey S. (Purdue University. Department of Forestry and Natural Resources)
Escolar, C. (Universidad Rey Juan Carlos. Área de Biodiversidad y Conservación)
Fay, P (Grassland Soil and Water Research Laboratory (U.S.))
Guidolotti, Gabriele (Università degli studi della Tuscia di Viterbo. Dipartimento per l'Innovazione nei sistemi Biologici, Agro-alimentari e. Forestali)
Hanson, P. J. (Oak Ridge National Laboratory)
Kahmen, A. (Eidgenössischen Technischen Hochschule Zürich. Institut für Agrarwissenschaften)
Kröel-Dulay, György (Hungarian Academy of Sciences. Institute of Ecology and Botany)
Ladreiter-Knauss, T. (Universität Innsbruck. Institut für Ökologie)
Larsen, K. S. (Danmarks tekniske universitet. Institut for Kemisk og Biokemisk Teknologi)
Lellei-Kovacs, E. (Hungarian Academy of Sciences. Institute of Ecology and Botany)
Lebrija-Trejos, E. (Tel Aviv University. Department of Molecular Biology and Ecology of Plants)
Maestre, F. T. (Universidad Rey Juan Carlos. Área de Biodiversidad y Conservación)
Marhan, S. (Universität Hohenheim. Institut für Bodenkunde und Standortslehre)
Marshall, M (Centre for Ecology and Hydrology (Great Britain))
Meir, P. (University of Edinburgh. School of GeoSciences)
Miao, Y. (Henan da xue)
Muhr, J. (Max-Planck. Institut für Biogeochemie)
Niklaus, P. A. (Universität Zürich. Institut für Evolutionsbiologie und Umweltwissenschaften)
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)
Poll, C. (Universität Hohenheim. Institut für Bodenkunde und Standortslehre)
Rustad, L. E. (United States. Forest Service. Northeastern Research Station)
Savage, K. (Woods Hole Research Center (Woods Hole, Mass.))
Schindlbacher, A. (Bundesforschungs- und Ausbildungszentrum für Wald, Naturgefahren und Landschaft (Austria))
Schmidt, I. K. (Køvenhavns universitet. Department of Geosciences and Natural Resource Management)
Smith, A. R. (Centre for Ecology and Hydrology (Great Britain))
Sotta, E. D. (Embrapa Amapá Caixa Postal)
Suseela, V. (Purdue University. Department of Forestry and Natural Resources)
Tietema, A. (Universiteit van Amsterdam. Institute for Biodiversity and Ecosystem Dynamics)
Gestel, N. van (Texas Tech University. Department of Biological Sciences)
Straaten, O. van (Büsgen-Institut. Ökopedologie der Tropen und Subtropen)
Wan, S. (Henan da xue)
Weber, U. (Max-Planck. Institut für Biogeochemie)
Janssens, I. A. (Universiteit Antwerpen. Departement Biologie)

Data: 2014
Resum: As a key component of the carbon cycle, soil CO₂ efflux (SCE) is being increasingly studied to improve our mechanistic understanding of this important carbon flux. Predicting ecosystem responses to climate change often depends on extrapolation of current relationships between ecosystem processes and their climatic drivers to conditions not yet experienced by the ecosystem. This raises the question of to what extent these relationships remain unaltered beyond the current climatic window for which observations are available to constrain the relationships. Here, we evaluate whether current responses of SCE to fluctuations in soil temperature and soil water content can be used to predict SCE under altered rainfall patterns. Of the 58 experiments for which we gathered SCE data, 20 were discarded because either too few data were available or inconsistencies precluded their incorporation in the analyses. The 38 remaining experiments were used to test the hypothesis that a model parameterized with data from the control plots (using soil temperature and water content as predictor variables) could adequately predict SCE measured in the manipulated treatment. Only for 7 of these 38 experiments was this hypothesis rejected. Importantly, these were the experiments with the most reliable data sets, i. e. , those providing high-frequency measurements of SCE. Regression tree analysis demonstrated that our hypothesis could be rejected only for experiments with measurement intervals of less than 11 days, and was not rejected for any of the 24 experiments with larger measurement intervals. This highlights the importance of high-frequency measurements when studying effects of altered precipitation on SCE, probably because infrequent measurement schemes have insufficient capacity to detect shifts in the climate dependencies of SCE. Hence, the most justified answer to the question of whether current moisture responses of SCE can be extrapolated to predict SCE under altered precipitation regimes is "no" – as based on the most reliable data sets available. We strongly recommend that future experiments focus more strongly on establishing response functions across a broader range of precipitation regimes and soil moisture conditions. Such experiments should make accurate measurements of water availability, should conduct high-frequency SCE measurements, and should consider both instantaneous responses and the potential legacy effects of climate extremes. This is important, because with the novel approach presented here, we demonstrated that, at least for some ecosystems, current moisture responses could not be extrapolated to predict SCE under altered rainfall conditions.
Nota: Número d'acord de subvenció EC/FP7/226701
Nota: Número d'acord de subvenció EC/FP7/227628
Nota: Número d'acord de subvenció EC/FP7/242658
Nota: Número d'acord de subvenció MICINN/CGL2010-17172/BOS
Nota: Número d'acord de subvenció MICINN/CSD2008-00040
Nota: Número d'acord de subvenció 2009-SGR-458
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Moisture ; Precipitation ; Soil CO₂
Publicat a: Biogeosciences, Vol. 11 Issue 11 (Juny 2014) , p. 2991-3013, ISSN 1726-4170

DOI: 10.5194/bg-11-2991-2014


Article
23 p, 844.8 KB

Erratum
2 p, 261.3 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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 Registre creat el 2015-04-15, darrera modificació el 2016-11-30



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