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Pollination Syndromes and Floral Specialization
It is shown that pollination syndromes provide great utility in understanding the mechanisms of floral diversification and the importance of organizing pollinators into functional groups according to presumed similarities in the selection pressures they exert. Expand
Flower Constancy, Insect Psychology, and Plant Evolution
The way in which floral parameters, such as interplant distances, nectar rewards, flower morphology, and floral color affect constancy is considered, and the implications of pollinator constancy for plant evolution are discussed. Expand
Plight of the bumble bee: Pathogen spillover from commercial to wild populations
It is argued that the spillover of pathogens from commercial to wild bees is the most likely cause of this pattern and the implications of such spillover for bumble bee conservation are discussed. Expand
Untangling Multiple Factors in Spatial Distributions: Lilies, Gophers, and Rocks
It is hypothesized that seed germination is higher in less rocky areas of deeper, moister soil than in the rocky areas where most seeds land, but that seedlings seldom reach maturity unless they are in a rocky refuge from predation, and results from path analysis are consistent with this hypothesis. Expand
Evolutionary Options for Maximizing Pollen Dispersal of Animal-Pollinated Plants
On the average, nectar-collecting bumble bees deposited 0.6% of the pollen removed from the flowers of Erythronium grandiflorum (Liliaceae) onto the stigmas of subsequently visited flowers. BecauseExpand
An examination of synchrony between insect emergence and flowering in Rocky Mountain meadows
Using a reciprocal transplant experiment with nesting bees, it is confirmed that local environmental conditions are the primary determinants of emergence phenology, and pollinators are typically collected at flowers. Expand
The Natural History of Bumblebees: A Sourcebook for Investigations
Can insects be charming? Even people who generally dislike 'bugs' make exceptions for bumblebees. Their bright colours and intriguing behaviours can engage the curiosity of anyone from schoolchildrenExpand
A multivariate search for pollination syndromes among penstemons
The overarching pattern was that hummingbird syndrome characterizations were successful at predicting pollination by hummingbirds versus Hymenoptera, two types of animals that are profoundly different, but less successful at predicted visitation by one kind of bee versus another. Expand
Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators?
A spatially explicit model of pathogen spillover in bumble bees is constructed and, using laboratory experiments and the literature, parameter values for the spillover of Crithidia bombi, a destructive pathogen commonly found in commercial Bombus are estimated. Expand
Bumble-bee foragers infected by a gut parasite have an impaired ability to utilize floral information
It is found that natural and experimental infection by a protozoan parasite, impaired the ability of foragers to learn the colour of rewarding flowers and can reduce their ability to monitor floral resources and make economic foraging decisions. Expand