A global meta-analysis of soil organic carbon in the Anthropocene

Beillouin Damien, Corbeels Marc, Demenois Julien, Berre David, Boyer Annie, Fallot Abigail, Feder Frédéric, Cardinael Rémi. 2023. A global meta-analysis of soil organic carbon in the Anthropocene. Nature Communications, 14:3700, 10 p.

Url - jeu de données - Dataverse Cirad : https://doi.org/10.18167/DVN1/KKPLR8

Résumé : Anthropogenic activities profoundly impact soil organic carbon (SOC), affecting its contribution to ecosystem services such as climate regulation. Here, we conducted a thorough review of the impacts of land-use change, land management, and climate change on SOC. Using second-order meta-analysis, we synthesized findings from 230 first-order meta-analyses comprising over 25,000 primary studies. We show that (i) land conversion for crop production leads to high SOC loss, that can be partially restored through land management practices, particularly by introducing trees and incorporating exogenous carbon in the form of biochar or organic amendments, (ii) land management practices that are implemented in forests generally result in depletion of SOC, and (iii) indirect effects of climate change, such as through wildfires, have a greater impact on SOC than direct climate change effects (e.g., from rising temperatures). The findings of our study provide strong evidence to assist decision-makers in safeguarding SOC stocks and promoting land management practices for SOC restoration. Furthermore, they serve as a crucial research roadmap, identifying areas that require attention to fill the knowledge gaps concerning the factors driving changes in SOC.

Mots-clés Agrovoc : carbone organique du sol, changement anthropique, changements climatiques anthropogéniques, changement climatique, séquestration du carbone

Mots-clés libres : Meta-analysis, Agroforestry

Classification Agris : P40 - Météorologie et climatologie
P01 - Conservation de la nature et ressources foncières
P33 - Chimie et physique du sol

Champ stratégique Cirad : CTS 6 (2019-) - Changement climatique

Agences de financement hors UE : Consortium of International Agricultural Research Centers

Auteurs et affiliations

• Beillouin Damien, CIRAD-PERSYST-UPR HortSys (MTQ) ORCID: 0000-0003-2014-3482 - auteur correspondant
• Corbeels Marc, CIRAD-PERSYST-UPR AIDA (KEN)
• Demenois Julien, CIRAD-PERSYST-UPR AIDA (CRI) ORCID: 0000-0002-2271-8465
• Berre David, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0001-8494-9966
• Boyer Annie, CIRAD-DRS-DIST (FRA) ORCID: 0000-0001-7167-9725
• Fallot Abigail, CIRAD-ES-UMR SENS (FRA) ORCID: 0000-0002-7526-6917
• Feder Frédéric, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0001-8434-5193
• Cardinael Rémi, CIRAD-PERSYST-UPR AIDA (ZWE) ORCID: 0000-0002-9924-3269

Source : Cirad-Agritrop (https://agritrop.cirad.fr/605135/)

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