Single-visit pollination efficacy of <i>psithyrus insularism</i> and <i>megachile</i> on <i>chamerion augustifolium</i>
Abstract
There are many types of pollinators, all of which have an effect on a plant’s reproductive success. As the types of pollinators are variable, so are their effects on the plant. In this study, I estimated the single-‐visit efficacy of two different Colorado bees, Psithyrus insularis and Megachile, on Chamerion augustifolium, a common wildflower. Single-‐visit efficacy was measured by counting pollen deposition on stigmas from virgin flowers that had been visited by a bee. The proportion of heterospecific pollen deposited was found to be significantly less in P. insularis individuals than in Megachile individuals, making P. insularis the more effective pollinator.
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