Summary
This second-order meta-analysis synthesised 98 previous meta-analyses covering 5160 studies to assess how diversification practices in cropping systems affect biodiversity and ecosystem services. The findings demonstrate that diversified agricultural practices consistently enhance pollination, pest control, nutrient cycling, soil fertility, and water regulation whilst maintaining crop yields equivalent to simplified systems. The results indicate context-dependent outcomes with variability in responses and occasional trade-offs, though win-win scenarios predominate, suggesting diversification as a scalable pathway to support both biodiversity conservation and food security.
UK applicability
These findings are broadly applicable to UK arable and mixed farming systems, where intensification pressures mirror global trends. The evidence supports policy initiatives promoting on-farm diversification, though outcomes will depend on the specific combinations of practices adopted and local agroecological contexts.
Key measures
Biodiversity indices, pollination rates, pest control efficacy, nutrient cycling metrics, soil fertility indicators, water regulation capacity, crop yield comparisons
Outcomes reported
A second-order meta-analysis of 5160 original studies (41,946 comparisons) assessed the impact of diversification practices on above- and belowground biodiversity, pollination, pest control, nutrient cycling, soil fertility, and water regulation relative to simplified cropping systems. The study evaluated whether these ecosystem service enhancements could be achieved without compromising crop yields.
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