Biotic and Abiotic Drivers of Topsoil Organic Carbon Concentration in Drylands Have Similar Effects at Regional and Glob
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Biotic and Abiotic Drivers of Topsoil Organic Carbon Concentration in Drylands Have Similar Effects at Regional and Global Scales Juan J. Gaita´n,1,2,3* Fernando T. Maestre,4 Donaldo E. Bran,5 Gustavo G. Buono,6 Andrew J. Dougill,7 Guillermo Garcı´a Martı´nez,8 Daniela Ferrante,9 Reginald T. Guuroh,10,11 Anja Linsta¨dter,11,12 Virginia Massara,6 Andrew D. Thomas,13 and Gabriel E. Oliva9 1
Centro de Investigacio´n de Recursos Naturales (CIRN), Instituto de Suelos, Instituto Nacional de Tecnologı´a Agropecuaria (INTA), Nicola´s Repetto y de los Reseros, Sin Nu´mero, Hurlingham, 1686 Buenos Aires, Argentina; 2Departamento de Tecnologı´a, Universidad Nacional de Luja´n, 6700 Luja´n, Argentina; 3National Research Council of Argentina (CONICET), Buenos Aires, Argentina; 4 Departamento de Biologı´a y Geologı´a, Fı´sica y Quı´mica Inorga´nica, Escuela Superior de Ciencias Experimentales y Tecnologı´a, Universidad Rey Juan Carlos, 28933 Mo´stoles, Spain; 5Estacio´n Experimental Bariloche, Instituto Nacional de Tecnologı´a Agropecuaria (INTA), 8400 Bariloche, Rı´o Negro, Argentina; 6Estacio´n Experimental Chubut, Instituto Nacional de Tecnologı´a Agropecuaria (INTA), 9100 Trelew, Chubut, Argentina; 7School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK; 8Estacio´n Experimental Esquel, Instituto Nacional de Tecnologı´a Agropecuaria (INTA), 9200 Esquel, Chubut, Argentina; 9Estacio´n Experimental Santa Cruz, Instituto Nacional de Tecnologı´a Agropecuaria (INTA), 9400 Rı´o Gallegos, Santa Cruz, Argentina; 10CSIR-Forestry Research Institute of Ghana, KNUST, P.O. Box UP 63, Kumasi, Ghana; 11Botanical Institute, University of Cologne, Zu¨lpicher Str. 47b, 50674 Cologne, Germany; 12Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Karlrobert-Kreiten-Str. 13, 53115 Bonn, Germany; 13Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK
ABSTRACT Drylands contain 25% of the world’s soil organic carbon (SOC), which is controlled by many factors, both abiotic and biotic. Thus, understanding how these factors control SOC concentration can help to design more sustainable land-use practices in drylands aiming to foster and preserve SOC storage, something particularly important to fight ongoing global warming. We use two independent, large-
Received 11 January 2018; accepted 21 January 2019 Electronic supplementary material: The online version of this article (https://doi.org/10.1007/s10021-019-00348-y) contains supplementary material, which is available to authorized users. Author Contributions JJG and FTM developed the original idea. JJG conducted statistical analyses. FTM, DEB, GGB, AJD, GGM, DF, RTG, AL, VM, ADT and GEO collected and provided the data used. JJG wrote the first draft of the article, and all authors contributed to the final version of the manuscript. *Corresponding author; e-mail: [email protected]
scale databases with contrasting geographic coverage (236 sites in global drylands and 185 sites in Patagonia, Argentina) to evalua
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