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Pollinator Competition as a Driver of Floral Divergence : An Experimental Test [Plos One]

Subject Areas : flowers, flowering plants, corolla, foraging, birds, inflorescences, natural selection, pollen

par Frédéric Magné - publié le

Optimal foraging models of floral divergence predict that competition between two different types of pollinators will result in partitioning, increased assortative mating, and divergence of two floral phenotypes. We tested these predictions in a tropical plant-pollinator system using sexes of purple-throated carib hummingbirds (Anthracothorax jugularis) as the pollinators, red and yellow inflorescence morphs of Heliconia caribaea as the plants, and fluorescent dyes as pollen analogs in an enclosed outdoor garden.(...)

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