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Related Experiment Videos

The Haig-Westoby model revisited.

Martin Burd1

  • 1School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia. martin.burd@sci.monash.edu.au

The American Naturalist
|January 26, 2008
PubMed
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The Haig-Westoby model was updated to include variability in fertilization and resources. This suggests pollen limitation in seed set is common and may increase with pollinator attraction.

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Plant Reproductive Strategies

Background:

  • The Haig-Westoby model predicts equal limitation of seed set by pollen and resources.
  • Optimal pollinator attraction should balance ovule fertilization with resource availability.
  • Variability in resource and fertilization functions can alter this balance.

Purpose of the Study:

  • To incorporate stochastic variation into the Haig-Westoby model.
  • To explore the implications of variability on predictions of pollen limitation.
  • To investigate the relationship between pollinator attraction and pollen limitation.

Main Methods:

  • Modified the Haig-Westoby model to include stochastic variation.
  • Analyzed the impact of variability on seed set predictions.

Related Experiment Videos

  • Examined the role of pollen limitation and pollinator attraction.

    • Main Results:

    • The modified model predicts common pollen limitation of seed set.
    • Increased pollen limitation is predicted when plants are more attractive to pollinators.
    • Results align with meta-analyses on pollen limitation.

    Conclusions:

    • Stochastic variation is crucial for understanding plant reproductive strategies.
    • Pollen limitation may be more prevalent than previously assumed.
    • Further research is needed to test the prediction regarding pollinator attraction.