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

Peter Chesson and Jessica J. Kuang

Theoretical Population Biology, 2010, vol. 78, issue 2, 148-164

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.

Keywords: Frequency-dependent predation; Switching; Foraging behavior; Apparent competition; Species coexistence; Storage effect due predation; Annual plant community; Seed predator (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:thpobi:v:78:y:2010:i:2:p:148-164

DOI: 10.1016/j.tpb.2010.06.003

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