Summary
Pollen carryover was measured in three species of bumble bee pollinated plants by counting the numbers of foreign grains applied to the stigmas of a series of flowers by bumble bees. Deposition declined with the number of flowers visited in a roughly exponential fashion; most grains were deposited on the first few flowers, but some grains went much farther, the maximum carryover being 54 flowers. Variation in deposition was very high. In Diervilla lonicera, bees desposited significantly more grains on flowers which contained large amounts of nectar than on drained flowers. The implications are discussed in terms of plant strategies for optimizing pollination.
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Thomson, J.D., Plowright, R.C. Pollen carryover, nectar rewards, and pollinator behavior with special reference to Diervilla lonicera . Oecologia 46, 68–74 (1980). https://doi.org/10.1007/BF00346968
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DOI: https://doi.org/10.1007/BF00346968