Bee declines haven't dragged down global crop yields yet
Aizen MA, Gleiser G, Morales CL, Sáez A, Harder LD
Pollinators
The tomatoes and squash in your garden may still set fruit fine even as native bee sightings dwindle, because managed honeybees and breeding improvements are quietly picking up the slack.
Scientists know wild bees and other pollinators are disappearing in many places, and everyone assumed that would mean smaller harvests worldwide. But when researchers checked decades of global crop data, they found no clear sign that yields are actually suffering yet. It turns out farmers have been compensating with managed bees, an invasive bee species has spread into the gap, and better crop varieties are helping fruits and seeds form even when fewer wild pollinators show up.
Key Findings
Long-term FAO yield data show no consistent slowdown in growth for crops that depend heavily on pollinators compared to those that don't.
Pollen limitation (insufficient pollen reaching flowers) is common in pollinator-dependent crops and gets worse as reliance on pollinators increases, yet this hasn't translated into a global yield crisis.
Mitigating factors, including managed pollinator populations, spreading invasive bee species, and crop breeding advances, appear to be buffering global yields against documented declines in native pollinator diversity.
chevron_right Technical Summary
Despite well-documented declines in wild pollinators, global crop yields haven't taken the hit scientists feared. Better bee management, invasive honeybees filling gaps, and improved crop breeding have so far masked the impact on food supply.
Abstract Preview
Original paper
Global agriculture shows limited evidence of a pollinator-driven yield decline to date.
During recent decades, declines in the abundance and diversity of wild pollinators have been widely documented, largely driven by human-induced disturbance, such as agricultural expansion, land-use...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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