The effects of floral display on pollinator visitation vary among populations ofPhacelia linearis (Hydrophyllaceae)

Eckhart, Vincent M.

doi:10.1007/bf02214154

Cited by 188 publications

(173 citation statements)

References 47 publications

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“…Como resultado, los robadores de néctar visitan con más frecuencia flores de corolas largas. Adicionalmente, la cantidad de flores disponible en un área puede actuar como un atrayente para los visitantes florales, ya que probablemente el hecho de que un recurso sea más abundante implica que es más fácilmente detectable (Eckhart 1991, Mitchell et al 2004. Por lo tanto el esfuerzo de búsqueda durante el forrajeo se minimiza, aumentando así la eficiencia para la obtención de los recursos alimenticios.…”

Section: Discussionunclassified

Asociación entre el robo de néctar y las características florales en una comunidad montana de los Andes colombianos

Nossa

2013

ECOS

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Section: Discussionunclassified

Asociación entre el robo de néctar y las características florales en una comunidad montana de los Andes colombianos

Nossa

2013

ECOS

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“…Petal size has been shown to influence visitation rates in a variety of species (e.g., Clements and Long 1923;Bell 1985;Galen 1989;Young and Stanton 1990;Eckhart 1991;Conner and Rush 1996). In their studies on the closely related R. sativus, Mazer and Meade (2000) found that populations with a large petal area were associated with high honeybee densities.…”

Section: Discussionmentioning

confidence: 99%

Adaptive Differentiation of Quantitative Traits in the Globally Distributed Weed, Wild Radish (Raphanus raphanistrum)

et al. 2008

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Weedy species with wide geographical distributions may face strong selection to adapt to new environments, which can lead to adaptive genetic differentiation among populations. However, genetic drift, particularly due to founder effects, will also commonly result in differentiation in colonizing species. To test whether selection has contributed to trait divergence, we compared differentiation at eight microsatellite loci (measured as F ST ) to differentiation of quantitative floral and phenological traits (measured as Q ST ) of wild radish (Raphanus raphanistrum) across populations from three continents. We sampled eight populations: seven naturalized populations and one from its native range. By comparing estimates of Q ST and F ST , we found that petal size was the only floral trait that may have diverged more than expected due to drift alone, but inflorescence height, flowering time, and rosette formation have greatly diverged between the native and nonnative populations. Our results suggest the loss of a rosette and the evolution of early flowering time may have been the key adaptations enabling wild radish to become a major agricultural weed. Floral adaptation to different pollinators does not seem to have been as necessary for the success of wild radish in new environments.

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“…Larger inflorescences are usually more attractive to foraging animals and receive higher visitation rates (Augspurger 1980;Patón 1982;Gori 1989;Eckhart 1991). The effect this has on fer tilizations per flower is variable, however, because increased visitation rates need not keep pace with increases in flower number (Pyke 1978(Pyke , 1982Klinkhamer and de Jong 1989).…”

Section: Ejfects Of Plant Sizementioning

confidence: 99%

Ovule Packaging in Stochastic Pollination and Fertilization Environments

Burd

1995

Evolution

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Abstract.-The modular morphology of plants has important consequences for reproductive strategies. Ovules are packaged in discrete structures (flowers) that usually vary stochastically in pollen capture and ovule fertilization, because of the vagaries of pollen transfer by external agents. Different ovule packaging schemes may use limited reproductive resources more or less effectively, so that some number of ovules per flower may be optimal, given the prevailing probabilities of ovule fertilization. I derive a phenotypic model for ovule number per flower that maximizes the expected total ovule fertilizations on a plant when pollination and fertilization vary randomly among individual flowers. This model predicts that, except for small or inexpensive flowers, ovules should be "oversupplied" relative to the mean receipt of pollen tubes, so that pollen limitation of seed set should be common. Published data are congruent with this prediction. Additional hypotheses on the relation of ovule packaging to floral cost, plant size, and variance in pollen receipt are suggested by the model, but few data exist to evaluate these hypotheses.

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The effects of floral display on pollinator visitation vary among populations ofPhacelia linearis (Hydrophyllaceae)

Cited by 188 publications

References 47 publications

Asociación entre el robo de néctar y las características florales en una comunidad montana de los Andes colombianos

Asociación entre el robo de néctar y las características florales en una comunidad montana de los Andes colombianos

Adaptive Differentiation of Quantitative Traits in the Globally Distributed Weed, Wild Radish (Raphanus raphanistrum)

Ovule Packaging in Stochastic Pollination and Fertilization Environments

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