Temperature response of soil respiration largely unaltered with experimental warming
Carey, Joanna C. (The Ecosystems Center, Marine Biological Laboratory (USA))
Tang, Jianwu (The Ecosystems Center, Marine Biological Laboratory (USA))
Templer, Pamela H. (Boston University. Department of Biology)
Kroeger, Kevin D. (United States Geological Survey. Western Ecological Research Center (USA))
Crowther, Thomas W. (Yale University. School of Forestry & Environmental Studies)
Burton, Andrew (Michigan Technological University. School of Forest Resources and Environmental Science)
Dukes, Jeffrey S. (Purdue University. Department of Forestry and Natural Resources)
Emmett, Bridget (Environment Centre Wales. Centre for Ecology and Hydrology)
Frey, Serita D. (University of New Hampshire. Department of Natural Resources and the Environment)
Heskel, Mary A. (The Ecosystems Center, Marine Biological Laboratory (USA))
Jiang, Lifen (University of Oklahoma. Department of Microbiology and Plant Biology)
Mohan, Jacqueline (University of Georgia. Odum School of Ecology)
Machmuller, Megan B. (Colorado State University. Natural Resource Ecology Laboratory)
Panetta, Anne Marie (University of California. Department of Evolution and Ecology)
Reich, Peter (University of Minnesota. Department of Forest Resources)
Reinsch, Sabine (Environment Centre Wales. Centre for Ecology and Hydrology)
Wang, Xin (Chinese Academy of Sciences. Institute of Botany)
Allison, Steven D. (University of California. Department of Ecology and Evolutionary Biology)
Bamminger, Chris (University of Hohenheim. Institute of Soil Science and Land Evaluation)
Bridgham, Scott (University of Oregon. Institute of Ecology and Evolution)
Collins, Scott L. (University of New Mexico. Department of Biology)
de Dato, Giovanbattista (Centro di Ricerche Forestale)
Eddy, William C. (University of Minnesota. Department of Ecology, Evolution, and Behavior)
Enquist, Brian J. (University of Arizona. Department of Ecology and Evolutionary Biology)
Estiarte, Marc (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Harte, John (University of California. Department of Environmental Science, Policy and Management)
Henderson, Amanda (University of Arizona. Department of Ecology and Evolutionary Biology)
Johnson, Bart R. (University of Oregon. Department of Landscape Architecture)
Larsen, Klaus Steenberg (University of Copenhagen. Department of Geosciences and Natural Resource Management)
Luo, Yiqi (University of Oklahoma. Department of Microbiology and Plant Biology)
Marhan, Sven (University of Hohenheim. Institute of Soil Science and Land Evaluation)
Melillo, Jerry M. (The Ecosystems Center, Marine Biological Laboratory (USA))
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Pfeifer-Meister, Laurel (University of Oregon. Institute of Ecology and Evolution)
Poll, Christian (University of Hohenheim. Institute of Soil Science and Land Evaluation)
Rastetter, Edward (The Ecosystems Center, Marine Biological Laboratory (USA))
Reinmann, Andrew B. (Boston University. Department of Biology)
Reynolds, Lorien L. (University of Oregon. Institute of Ecology and Evolution)
Schmidt, Inger K. (University of Copenhagen. Department of Geosciences and Natural Resource Management)
Shaver, Gaius R. (The Ecosystems Center, Marine Biological Laboratory (USA))
Strong, Aaron L. (Stanford University. Emmett Interdisciplinary Program in Environment and Resources)
Suseela, Vidya (Clemson University. Department of Agricultural & Environmental Sciences)
Tietema, Albert (University of Amsterdam. Institute for Biodiversity and Ecosystem Dynamics)

Data:	2016
Resum:	The respiratory release of carbon dioxide (CO2) from soil is a major yet poorly understood flux in the global carbon cycle. Climatic warming is hypothesized to increase rates of soil respiration, potentially fueling further increases in global temperatures. However, despite considerable scientific attention in recent decades, the overall response of soil respiration to anticipated climatic warming remains unclear. We synthesize the largest global dataset to date of soil respiration, moisture, and temperature measurements, totaling >3,800 observations representing 27 temperature manipulation studies, spanning nine biomes and over 2 decades of warming. Our analysis reveals no significant differences in the temperature sensitivity of soil respiration between control and warmed plots in all biomes, with the exception of deserts and boreal forests. Thus, our data provide limited evidence of acclimation of soil respiration to experimental warming in several major biome types, contrary to the results from multiple single-site studies. Moreover, across all nondesert biomes, respiration rates with and without experimental warming follow a Gaussian response, increasing with soil temperature up to a threshold of ∼25 °C, above which respiration rates decrease with further increases in temperature. This consistent decrease in temperature sensitivity at higher temperatures demonstrates that rising global temperatures may result in regionally variable responses in soil respiration, with colder climates being considerably more responsive to increased ambient temperatures compared with warmer regions. Our analysis adds a unique cross-biome perspective on the temperature response of soil respiration, information critical to improving our mechanistic understanding of how soil carbon dynamics change with climatic warming.
Ajuts:	European Commission 610028 Ministerio de Economía y Competitividad CGL2013-48074-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-274 European Commission 227628
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Soil respiration ; Climate change ; Experimental warming ; Temperature sensitivity ; Biome
Publicat a:	Proceedings of the National Academy of Sciences of the United States of America, Vol. 113, Issue 48 (November 2016) , p. 13797-13802, ISSN 1091-6490

DOI: 10.1073/pnas.1605365113
PMID: 27849609

Postprint 29 p, 1.4 MB

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