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Clark DB, McClelland SC, Dillon JA, Hayek MN. Regenerative Grazing as a Climate Change Mitigation Strategy: A Systematic Review. Biorxiv Ecology; 2025. [Submitted]

Abstract: Ruminant livestock production is a meaningful contributor to global greenhouse gas (GHG) emissions. Regenerative grazing has been proposed as a climate change mitigation strategy by offsetting GHG emissions with soil organic carbon (SOC) sequestration. We review reported and inferred SOC sequestration from regenerative grazing experiments, and rank their study designs by ascending evidentiary strength: observational, cross-sectional and longitudinal. SOC sequestration rates varied widely, with the highest values reported in lower-strength observational studies. Among higher-strength cross-sectional studies and longitudinal studies, median SOC sequestration rates were not significantly different than zero, indicating no significant enhancement of SOC. Currently, higher-strength evidence does not support widespread claims of SOC sequestration from regenerative grazing. To clarify its potential for climate mitigation, a greater number of longitudinal studies are needed.