Coevolution of Foraging in Bombus and Nectar Dispensing in Chilopsis: A Last Dreg Theory

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Science  05 Aug 1977:
Vol. 197, Issue 4303, pp. 593-596
DOI: 10.1126/science.197.4303.593


Flowers of Chilopsis linearis dispense nectar into pools and grooves. The bumblebee, Bombus sonorus, extracts pool nectar at a rate seven times faster than groove nectar. The result is the coevolution of a plant-pollinator system in which bees, while foraging efficiently, increase the number of flowers visited per calorie of nectar reward provided by the plant.