Methods - We studied spatio-temporal variation in the relationships between floral advertisement and the probability of seed predation within three focal populations. Then, we assessed among-population covariation of predation rate, pollination reliability, mating system, and blossom traits across 20 populations.
Key Results - The probability of seed predation was largely unrelated to variation in floral advertisement both within focal populations, and among the larger sample of populations. The rate of seed predation was only weakly associated with the rate of cross-pollination in each population but tended to be proportionally greater in populations experiencing less reliable pollination.
Conclusions - These results suggest that, while solitary bees and seed weevils differ in their responses to landscape-scale environmental heterogeneity, geographic variation in the relative intensities of mutualistic and antagonistic interactions have not affected the evolutionary trajectories of floral advertisement in plant populations in this system. Thus, pollinator-driven floral trait evolution in Dalechampia scandens in our study area appears not to be constrained by conflicting seed-predator-mediated selection.
- Dalechampia; herkogamy; interaction turnover; phenotypic selection; plant mating systems; seed predation
- seed predation
- plant mating systems
- phenotypic selection
- interaction turnover
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Opedal, Ø. H. (Creator), Albertsen, E. (Creator), Perez-Barrales, R. (Creator), Armbruster, S. (Creator) & Pélabon, C. (Creator), Wiley Online Library, 16 Oct 2018