Global ecological predictors of the soil priming effect

Felipe Bastida (), Carlos García, Noah Fierer, David J. Eldridge, Matthew A. Bowker, Sebastián Abades, Fernando D. Alfaro, Asmeret Asefaw Berhe, Nick A. Cutler, Antonio Gallardo, Laura García-Velázquez, Stephen C. Hart, Patrick E. Hayes, Teresa Hernández, Zeng-Yei Hseu, Nico Jehmlich, Martin Kirchmair, Hans Lambers, Sigrid Neuhauser, Víctor M. Peña-Ramírez, Cecilia A. Pérez, Sasha C. Reed, Fernanda Santos, Christina Siebe, Benjamin W. Sullivan, Pankaj Trivedi, Alfonso Vera, Mark A. Williams, José Luis Moreno and Manuel Delgado-Baquerizo
Additional contact information
Felipe Bastida: Department of Soil and Water Conservation
Carlos García: Department of Soil and Water Conservation
Noah Fierer: University of Colorado
David J. Eldridge: University of New South Wales
Matthew A. Bowker: Northern Arizona University
Sebastián Abades: Universidad Mayor
Fernando D. Alfaro: Universidad Mayor
Asmeret Asefaw Berhe: and Sierra Nevada Research Institute University of California
Nick A. Cutler: Newcastle University
Antonio Gallardo: Químicos y Naturales. Universidad Pablo de Olavide
Laura García-Velázquez: Químicos y Naturales. Universidad Pablo de Olavide
Stephen C. Hart: and Sierra Nevada Research Institute University of California
Patrick E. Hayes: The University of Western Australia
Teresa Hernández: Department of Soil and Water Conservation
Zeng-Yei Hseu: National Taiwan University
Nico Jehmlich: Helmholtz-Centre for Environmental Research – UFZ, Department of Molecular Systems Biology
Martin Kirchmair: University of Innsbruck
Hans Lambers: The University of Western Australia
Sigrid Neuhauser: University of Innsbruck
Víctor M. Peña-Ramírez: Universidad Nacional Autónoma de México, Ciudad Universitaria
Cecilia A. Pérez: Instituto de Ecología and Biodiversidad (IEB)
Sasha C. Reed: Southwest Biological Science Center
Fernanda Santos: and Sierra Nevada Research Institute University of California
Christina Siebe: Universidad Nacional Autónoma de México, Ciudad Universitaria
Benjamin W. Sullivan: University of Nevada
Pankaj Trivedi: Colorado State University
Alfonso Vera: Department of Soil and Water Conservation
Mark A. Williams: School of Plant and Environmental Sciences, Virginia Tech
José Luis Moreno: Department of Soil and Water Conservation
Manuel Delgado-Baquerizo: Universidad Rey Juan Carlos, Calle Tulipán Sin Número

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Identifying the global drivers of soil priming is essential to understanding C cycling in terrestrial ecosystems. We conducted a survey of soils across 86 globally-distributed locations, spanning a wide range of climates, biotic communities, and soil conditions, and evaluated the apparent soil priming effect using 13C-glucose labeling. Here we show that the magnitude of the positive apparent priming effect (increase in CO2 release through accelerated microbial biomass turnover) was negatively associated with SOC content and microbial respiration rates. Our statistical modeling suggests that apparent priming effects tend to be negative in more mesic sites associated with higher SOC contents. In contrast, a single-input of labile C causes positive apparent priming effects in more arid locations with low SOC contents. Our results provide solid evidence that SOC content plays a critical role in regulating apparent priming effects, with important implications for the improvement of C cycling models under global change scenarios.

Date: 2019
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DOI: 10.1038/s41467-019-11472-7

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