• Aizen MA, Harder LD. 2007. Expanding the limits of the pollen-limitation concept: effects of pollen quantity and quality. Ecology 88: 271281.
  • Allen-Wardell G, Bernhardt P, Bitner R, Burquez A, Buchmann S, Cane J, Cox PA, Dalton V, Feinsinger P et al. 1998. The potential consequences of pollinator declines on the conservation of biodiversity and stability of food crop yields. Conservation Biology 12: 817.
  • Ashman T-L, Knight TM, Steets JA, Amarasekare P, Burd M, Campbell DR, Dudash MR, Johnston MO, Mazer SJ, Mitchell RJ et al. 2004. Pollen limitation of plant reproduction: ecological and evolutionary causes and consequences. Ecology 85: 24082421.
  • Ashman T-L, Morgan MT. 2004. Explaining phenotypic selection on plant attractive characters: male function, gender balance or ecological context? Proceedings: Biological Sciences 271: 553559.
  • Biesmeijer JC, Roberts SPM, Reemer M, Ohlemuller R, Edwards M, Peeters T, Schaffers AP, Potts SG, Kleukers R, Thomas CD et al. 2006. Parallel declines in pollinators and insect-pollinated plants in Britain and the Netherlands. Science 313: 351354.
  • Fishman L, Willis JH. 2007. Pollen limitation and natural selection on floral characters in the yellow monkeyflower, Mimulus guttatus. New Phytologist 177: 802810.
  • Frey FM. 2004. Opposing natural selection from herbivores and pathogens may maintain floral-color variation in Claytonia virginica (Portulacaceae). Evolution 58: 24262437.
  • Galen C. 1999. Why do flowers vary? Bioscience 49: 631648.
  • Herrera CM. 1995. Microclimate and individual variation in pollinators: flowering plants are more than their flowers. Ecology 76: 15161524.
  • Kalisz S, Vogler DW, Hanley KM. 2004. Context-dependent autonomous self-fertilization yields reproductive assurance and mixed mating. Nature 430: 884887.
  • Klein AM, Vaissière BE, Cane JH, Steffan-Dewenter I, Cunningham SA, Kremen C, Tscharntke T. 2007. Importance of pollinators in changing landscapes for world crops. Proceedings of the Royal Society B: Biological Sciences 274: 303313.
  • Knight TM, Steets JA, Vamosi JC, Mazer SJ, Burd M, Campbell DR, Dudash MR, Johnston MO, Mitchell RJ, Ashman T-L. 2005. Pollen limitation of plant reproduction: pattern and process. Annual Review of Ecology, Evolution, and Systematics 36: 467497.
  • Moeller DA. 2005. Pollinator community structure and sources of spatial variation in plant–pollinator interactions in Clarkia xantiana ssp. xantiana. Oecologia 142: 2837.
  • National Research Council Committee on the Status of Pollinators in North America. 2007. Status of Pollinators in North America. Washington DC, USA: National Academies Press.
  • Pauw A. 2007. Collapse of a pollination web in small conservation areas. Ecology 88: 17591769.
  • Willis JH. 1993. Partial self-fertilization and inbreeding depression in two populations of Mimulus guttatus. Heredity 71: 145154.