Genomic evidence for long-term ecological interdependence of a plant-hummingbird mutualism.

Genomic analysis reveals synchronized population dynamics over millions of years, confirming long-term ecological interdependence in a plant-hummingbird mutualism.

• Why it matters: Understanding the genetic signatures of coevolution helps clarify how mutualistic relationships persist despite ecological fluctuations and partner switching, addressing a key gap in evolutionary ecology.
• What they did: The study used comparative genomics to analyze population trajectories and genetic diversity in the purple-throated carib hummingbird and two Heliconia plant species on Dominica, focusing on long-term coadaptation.
• The result: Findings show aligned population fluctuations and contrasting genetic diversity patterns linked to ecological roles, demonstrating that specialized mutualisms can produce enduring evolutionary signatures.