The soil microbiome governs the response of microbial respiration to warming across the globe

Tadeo Sáez-Sandino (), Pablo García-Palacios, Fernando T. Maestre, César Plaza, Emilio Guirado, Brajesh K. Singh, Juntao Wang, Concha Cano-Díaz, Nico Eisenhauer, Antonio Gallardo and Manuel Delgado-Baquerizo ()
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Tadeo Sáez-Sandino: Universidad Pablo de Olavide
Pablo García-Palacios: Consejo Superior de Investigaciones Científicas
Fernando T. Maestre: Universidad de Alicante
César Plaza: Consejo Superior de Investigaciones Científicas
Emilio Guirado: Universidad de Alicante
Brajesh K. Singh: Western Sydney University
Juntao Wang: Western Sydney University
Concha Cano-Díaz: Rua Escola Industrial e Comercial Nun’Álvares
Nico Eisenhauer: German Centre for Integrative Biodiversity Research (iDiv) Halle–Jena–Leipzig
Antonio Gallardo: Universidad Pablo de Olavide
Manuel Delgado-Baquerizo: CSIC

Nature Climate Change, 2023, vol. 13, issue 12, 1382-1387

Abstract: Abstract The sensitivity of soil microbial respiration to warming (Q10) remains a major source of uncertainty surrounding the projections of soil carbon emissions to the atmosphere as the factors driving Q10 patterns across ecosystems have been assessed in isolation from each other. Here we report the results of a warming experiment using soils from 332 sites across all continents and major biomes to simultaneously evaluate the main drivers of global Q10 patterns. Compared with biochemical recalcitrance, mineral protection, substrate quantity and environmental factors, the soil microbiome (that is, microbial biomass and bacterial taxa) explained the largest portion of variation in Q10 values. Our work provides solid evidence that soil microbiomes largely govern the responses of soil heterotrophic respiration to warming and thus need to be explicitly accounted for when assessing land carbon–climate feedbacks.

Date: 2023
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DOI: 10.1038/s41558-023-01868-1

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