A 2025 Nature Food study did not directly model genetic erosion or farmer livelihoods. It modeled the climatic niches of 30 major food crops and how many crop options may remain climatically suitable across existing croplands under 1.5–4°C global warming.
Low latitudes face the largest loss of current climatic suitability
Under 2°C warming, 10–31% of current production in low-latitude regions was projected to shift outside the estimated climatic niche; under 3°C warming the range increased to 20–48%.
These percentages are not direct yield-loss forecasts. Breeding, irrigation, planting-date changes, management and other adaptation can alter outcomes.
The paper modeled potential crop diversity, not all social consequences
The earlier article attributed loss of traditional varieties, farmer migration, food-price increases and other downstream impacts directly to this study. Those are important climate-risk topics, but they were not the outcomes modeled here.
The central result is that low-latitude croplands may have fewer climatically suitable crop choices, increasing pressure for breeding, crop switching and conservation of useful germplasm.
For related context, see What Could Climate Change Do to European Hops by 2050? Re-reading the Yield and Alpha-Acid Projections.
For related context, see How Much Could Japan's Alpine Autumn Colors Fade? Earlier Green-Up Predicts Lower Brightness.
For related context, see What If Crops Could Use Far-Red Light? A 3D Soybean Canopy Model Predicts Up to 26% More CO₂ Assimilation.
Reference
- Heikonen S et al. Climate change threatens crop diversity at low latitudes. Nature Food. 2025. https://doi.org/10.1038/s43016-025-01135-w
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