The evolution of a pollen diet: Host choice and diet breadth of Andrena bees (Hymenoptera: Andrenidae)
We investigate of two aspects of pollen diet of Andrena bees: the evolution of diet breadth within nearctic representatives of the genus, which includes both polylectic and oligolectic species; and host choice within an oligolectic clade of Andrena. We also evaluate phenology. Traits were mapped ont...
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| Veröffentlicht in: | Apidologie 2008-01, Vol.39 (1), p.133-145 |
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| creator | Larkin, Leah L Neff, John L Simpson, Beryl B |
| description | We investigate of two aspects of pollen diet of Andrena bees: the evolution of diet breadth within nearctic representatives of the genus, which includes both polylectic and oligolectic species; and host choice within an oligolectic clade of Andrena. We also evaluate phenology. Traits were mapped onto a molecular phylogeny to identify the ancestral character states. Overall, oligolecty appears to be the basal state within Andrena, and broader diets have evolved a number of times, suggesting that specialization is not a “dead end”. Within the oligolectic clade studied, host shifts occur predominantly between members of the same plant tribe, indicating a phylogenetic constraint to host-usage; however, shifts to other tribes are not uncommon, and may lead to adaptive radiation. Additionally, some lineages retain the ability to use pollen from an ancestral host-plant tribe. Finally, we find a correlation between using host plants in the family Asteraceae and fall emergence. |
| doi_str_mv | 10.1051/apido:2007064 |
| format | Article |
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| source | EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; SpringerLink Journals - AutoHoldings |
| subjects | adaptive radiation Agricultural sciences Andrena Andrenidae Animal biology Animal production studies Asteraceae Biodiversity Biomedical and Life Sciences diet Ecology, environment Entomology host plants Hymenoptera Invertebrate Zoology Life Sciences Original Article phenology phylogeny pollen |
| title | The evolution of a pollen diet: Host choice and diet breadth of Andrena bees (Hymenoptera: Andrenidae) |
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