Does Bumble Bee Diet Breadth vary with the Floral Abundance in a Meadow?

Abstract

Years of early snowmelt tend to have a decrease in floral abundance throughout the year. This causes flowers to be more susceptible to frost and drought stress. Based on which flowers are successful this can affect bumble bee diet breadth due to the direct correlation between bumble bee proboscis length and flower corolla length. It was found that there is no relation between Bombus appositus diet breadth and floral abundance. Other factors such as floral richness, and overall bumble bee abundance also proved to not have an influence on diet breadth. The relationship between Delphinium barbeyi abundance and the proportion of flowers visited also did not have any significance.

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5 in Knowledge Commons, 5 external

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