Baoku Shi, Northeast Normal University
Manuel Delgado-Baquerizo, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS)
Alan K. Knapp, Colorado State University
Melinda D. Smith, Colorado State UniversityFollow
Sasha Reed, Southwest Biological Science Center
Brooke Osborne, Utah State UniversityFollow
Yolima Carrillo, Western Sydney University
Fernando T. Maestre, King Abdullah University of Science and Technology
Yu Zhu, Central South University of Forestry and Technology
Anping Chen, Colorado State University
Kate Wilkins, Colorado State University
Martin C. Holdrege, Utah State University
Andrew Kulmatiski, Utah State UniversityFollow
Catherine Picon-Cochard, Université Clermont Auvergne
Christiane Roscher, Helmholtzcentre for environmental Research,
Sally Power, Western Sydney University
Kerry M. Byrne, California State Polytechnic University
Amber C. Churchill, University of Minnesota
Anke Jentsch, University of Bayreuth
Hugh A. L. Henry, University of Western Ontario
Karen H. Beard, Utah State UniversityFollow
Max A. Schuchardt, University of Bayreuth
Nico Eisenhauer, German Centre for Integrative Biodiversity Research
Rafael Otfinowski, The University of Winnipeg
Yann Hautier, Utrecht University
Huitao Shen, Hebei Academy of Sciences
Yonghui Wang, Inner Mongolia University
Zhongwu Wang, Inner Mongolia Agricultural University
Chengliang Wang, Northeast Normal University
Daniela Francis Cusack, Colorado State University
Alessandro Petraglia, University of Parma
Michele Carbognani, University of Parma
T’ai G.W. Forte, University of Parma
S. Luke Flory, University of Florida
Pengli Hou, Northeast Normal University
Tao Zhang, Northeast Normal University
Weifeng Gao, Northeast Normal University
Wei Sun, Northeast Normal UniversityFollow

Document Type

Article

Journal/Book Title/Conference

Science Advances

Author ORCID Identifier

Baoku Shi https://orcid.org/0000-0003-3954-9415

Manuel Delgado-Baquerizo https://orcid.org/0000-0002-6499-576X

Alan K. Knapp https://orcid.org/0000-0003-1695-4696

Melinda D. Smith https://orcid.org/0000-0003-4920-6985

Sasha Reed https://orcid.org/0000-0002-8597-8619

Yolima Carrillo https://orcid.org/0000-0002-8726-4601

Fernando T. Maestre https://orcid.org/0000-0002-7434-4856

Anping Chen https://orcid.org/0000-0003-2085-3863

Kate Wilkins https://orcid.org/0000-0002-9875-1149

Martin C. Holdrege https://orcid.org/0000-0003-4078-6012

Andrew Kulmatiski https://orcid.org/0000-0001-9977-5508

Catherine Picon-Cochard https://orcid.org/0000-0001-7728-8936

Sally Power https://orcid.org/0000-0002-2723-8671

Kerry M. Byrne https://orcid.org/0009-0003-5611-0620

Amber C. Churchill https://orcid.org/0000-0001-9136-8131

Anke Jentsch https://orcid.org/0000-0002-2345-8300

Karen H. Beard https://orcid.org/0000-0003-4997-2495

Max A. Schuchardt https://orcid.org/0000-0003-3103-8063

Nico Eisenhauer https://orcid.org/0000-0002-0371-6720

Rafael Otfinowski https://orcid.org/0000-0002-8242-5947

Huitao Shen https://orcid.org/0000-0001-5294-5282

Yonghui Wang https://orcid.org/0000-0002-3351-4134

Chengliang Wang https://orcid.org/0000-0001-7128-0685

Daniela Francis Cusack https://orcid.org/0000-0003-4681-7449

Alessandro Petraglia https://orcid.org/0000-0003-4632-2251

Michele Carbognani https://orcid.org/0000-0001-7701-9859

T’ai G.W. Forte https://orcid.org/0000-0002-8685-5872

Tao Zhang https://orcid.org/0000-0002-1229-9121

Weifeng Gao https://orcid.org/0000-0002-3277-1761

Wei Sun https://orcid.org/0000-0002-1601-2159

Volume

10

Issue

40

Publisher

American Association for the Advancement of Science (AAAS)

Publication Date

10-4-2024

Journal Article Version

Version of Record

First Page

1

Last Page

9

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Abstract

The increasing prevalence of drought events in grasslands and shrublands worldwide potentially has impacts on soil organic carbon (SOC). We leveraged the International Drought Experiment to study how SOC, including particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) concentrations, responds to extreme drought treatments (1-in-100-year) for 1 to 5 years at 19 sites worldwide. In more mesic areas (aridity index > 0.65), SOC and POC concentrations decreased by 7.9% (±3.9) and 15.9% (±6.2) with drought, respectively, but there were no impacts on MAOC concentrations. However, drought had no impact on SOC, POC, or MAOC concentrations in drylands (aridity index < 0.65). The response of SOC to drought varied along an aridity gradient, concomitant with interannual precipitation variability and standing SOC concentration gradients. These findings highlight the differing response magnitudes of POC and MAOC concentrations to drought and the key regulating role of aridity.

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