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Floral abundance and bee density affect species-specific foraging patterns of alpine bumble bees

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Title: Floral abundance and bee density affect species-specific foraging patterns of alpine bumble bees
Authors: Shibata, Akari Browse this author
Kudo, Gaku Browse this author →KAKEN DB
Keywords: Bombus
Floral choice
Flowering phenology
Seasonal dynamics
Visitation frequency
Issue Date: Dec-2020
Publisher: Springer
Journal Title: Arthropod-Plant Interactions
Volume: 14
Issue: 6
Start Page: 771
End Page: 783
Publisher DOI: 10.1007/s11829-020-09787-0
Abstract: In response to the qualitative and quantitative changes in floral resources, bumble bees flexibly forage multiple plant species throughout the growing season. During the short summer in an alpine ecosystem, the activity of worker bees is maximized in the middle of the season, when the competition for floral resources may be intense. We predicted that the foraging patterns of bumble bees are affected by both relative floral abundance and interactions between bumble bee species. We recorded the floral abundance of individual plant species and the foraging frequency of bumble bees in an alpine meadow during the major flowering period over 3 years. Two bumble bee species were common during the major flowering period. Although they tended to visit abundant floral species, the shorter-tongued species (Bombus hypocrita) showed a more diverse and flexible floral choice than the longer-tongued species (Bombus beaticola). The degree of floral use overlap between two bumble bee species tended to decrease when the foraging density of the longer-tongued species was high. These results indicated that multiple bumble bee species are able to coexist when certain bee species can flexibly change targeting flowers in response to the temporal variations in flowering species and the density of competing bee species. The extent of foraging flexibility is related to the morphological traits of bee species and availability of floral resources.
Rights: This is a post-peer-review, pre-copyedit version of an article published in Arthropod-Plant Interactions. The final authenticated version is available online at:
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柴田 あかり

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