The storage effect due to frequency-dependent predation in multispecies plant communities

Peter Chesson, Jessica J. Kuang

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Frequency-dependent seed predation (FDP) has been shown to be a powerful coexistence mechanism in models of annual plant communities. However, FDP undermines the competition-based coexistence mechanism called the storage effect (SEc), which relies on temporal environmental fluctuations that drive fluctuations in competition. Although environmental fluctuations also drive fluctuations in predation, a storage effect due to predation (SEp) may not arise due to a time lag between a change in the environment and the resulting change in the predation rate. Here we show how SEp can arise with multispecies FDP, and in a two-species setting with density-dependent frequency-dependence, partially compensating for the reduction in SEc, in the presence of predation. These outcomes occur when predatory behavior is flexible, and can accommodate to changes in prey abundances on a within-year time scale, leading to changes in predator preferences in response to prey abundances in a given year. When predator preferences are determined by average prey abundances over several years, FDP is still a strong coexistence mechanism but undermines SEc without creating SEp.

Original languageEnglish (US)
Pages (from-to)148-164
Number of pages17
JournalTheoretical Population Biology
Volume78
Issue number2
DOIs
StatePublished - Sep 1 2010

Keywords

  • Annual plant community
  • Apparent competition
  • Foraging behavior
  • Frequency-dependent predation
  • Seed predator
  • Species coexistence
  • Storage effect due predation
  • Switching

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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