Data from: Floral function: effects of traits on pollinators, male and female pollination success, and female fitness across three species of milkweeds (Asclepias)
La Rosa, Raffica J., Michigan State University
Conner, Jeffrey K., Michigan State University
Published Mar 09, 2017 on Dryad.
Cite this dataset
La Rosa, Raffica J.; Conner, Jeffrey K. (2017). Data from: Floral function: effects of traits on pollinators, male and female pollination success, and female fitness across three species of milkweeds (Asclepias) [Dataset]. Dryad. https://doi.org/10.5061/dryad.n81g1
PREMISE OF THE STUDY: Central questions in plant reproductive ecology are whether the functions of floral traits in hermaphrodites create conflict between sexes that could slow evolution, and whether individual floral traits function in pollinator attraction, efficiency, or both. We studied how floral traits affect pollinator visitation and efficiency, and how they affect male and female function and female fitness within and across three Asclepias species that differ in floral morphology.
METHODS: Using separate multiple regressions, we regressed pollen removal, deposition, and fruit number onto six floral traits. We also used path analyses integrating these variables with pollinator visitation data for two of the species to further explore floral function and its effects on fruit production.
KEY RESULTS: Most traits affected male pollination success only, and these effects often differed between species. The exception was increased slit length, which increased pollinia insertion in two of the species. There were no interspecific differences in the effects of the traits on female pollination success. All traits except horn reach affected pollination efficiency in at least one species, and horn reach and two hood dimensions were the only traits to affect pollinator attraction, but in just one species.
CONCLUSIONS: Traits tended to function in only one sex, and more traits affected function through pollinator efficiency than through attraction. There was no significant link between female pollination success and female fitness in any of the three species; this pattern is consistent with fruit production not being limited by pollen deposition.
Trait, fitness, and pollinator data for three Asclepias spp.
This file contains the three Asclepias species (A. syriaca, A. tuberosa, and A. viridiflora), plant IDs, raw trait measurements, relative traits (using geometric mean), display size, measures of pollination success (pollinaria removed per flower and pollinia inserted per flower), female reproductive success (fruit quantity), standardized traits and display size (subset by either pollination success "remins-" or reproductive success "fruit-), and the number of pollinator visits and duration of stays per 10 minutes (from video). Data may be used to calculate selection gradients, compare traits across species, and relate traits to pollinator visitation, among other things.