Hummingbirds are doubling the rate at which bromeliad plants split into new species compared to other pollinators, according to scientists at the University of Reading. The research team examined pollination records for 403 bromeliad species, a family that includes pineapples and over 3,700 other plants. Three out of four bromeliads are visited by hummingbirds.
The findings shed light on how specialized pollinators shape plant evolution. Bromeliads, native to the Americas, have diversified extensively, and hummingbirds appear to be a key driver. Their close relationship with the plants may have accelerated genetic divergence through selective feeding patterns.
Data from the study revealed that hummingbird-pollinated bromeliads produce new species at roughly twice the rate of those relying on other animals. The team analyzed records spanning multiple ecosystems to reach this conclusion. This quantitative evidence underscores the hummingbird's outsized role in the family's diversification.
The implications extend beyond bromeliads. If similar patterns hold for other plant groups, conservation of hummingbird populations could be critical for preserving biodiversity. The findings also suggest that pollinator loss may slow evolutionary processes in dependent plant lineages.
"This is a striking example of how a single pollinator can shape the evolutionary trajectory of an entire plant family," a University of Reading researcher noted. The study opens avenues for exploring similar dynamics in other plant-pollinator systems.