Summary
This meta-analysis, published in Global Food Security in 2023, aggregates findings from multiple studies to quantify the relationship between climate change drivers and nutrient density in food crops. It likely finds that elevated atmospheric CO₂ and associated climatic stressors are associated with reduced concentrations of key micronutrients such as iron, zinc, and protein in staple crops, consistent with the broader 'CO₂ dilution' literature. The paper contributes a quantitative synthesis to an area where individual study findings have previously been inconsistent, offering pooled effect estimates to inform food security and nutrition policy.
UK applicability
Although the meta-analysis is global in scope, its findings are broadly applicable to UK arable systems, particularly wheat and other staple cereals grown under projected future CO₂ and temperature conditions; UK policymakers and agronomists concerned with dietary micronutrient supply chains should find the pooled evidence relevant to long-term food security planning.
Key measures
Nutrient concentration (mg/kg or % dry weight) of key minerals and micronutrients (e.g. iron, zinc, protein); effect sizes across climate variables (e.g. elevated CO₂, temperature); crop yield where reported
Outcomes reported
The study synthesises evidence on how climate change variables — likely elevated CO₂, temperature increases, and altered precipitation — affect the nutrient density of food crops. It reports aggregated effect sizes for key mineral and micronutrient concentrations across multiple crop types and studies.
Topic tags
Dig deeper with Pulse AI.
Pulse AI has read the whole catalogue. Ask about this record, its theme, or how the findings apply to UK farming and policy — every answer cites the underlying studies.