Early arrival of spring disrupts the mutualism between plants and pollinators

Bumble bee hovering in front of blue flowers.

(Hokkaido University) Researchers examined the relationship of Corydailis ambigua and bumble bees for 19 years in a natural forest of Hokkaido. Usually the bloom of the flowers and emergence of the bumble bees are in sync. But when the snowmelt is early, flowering tends to occur before the bees emerge, creating a mismatch. The wider the mismatch, the lower the seed-set rate due to insufficient pollination.