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Population and Community Ecology of Ontogenetic Development$
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André M. de Roos and Lennart Persson

Print publication date: 2013

Print ISBN-13: 9780691137575

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691137575.001.0001

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Emergent Facilitation among Predators on Size-Structured Prey

Emergent Facilitation among Predators on Size-Structured Prey

Chapter:
(p.165) Chapter 5 Emergent Facilitation among Predators on Size-Structured Prey
Source:
Population and Community Ecology of Ontogenetic Development
Author(s):

André M. de Roos

Lennart Persson

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691137575.003.0005

This chapter discusses a variety of positive interactions between predators foraging on different stages of the same prey species, which all emerge owing to the biomass overcompensation that may occur in prey life history stages in response to increased mortality. These interactions include emergent facilitation of specialist predators by generalists that forage on the same prey individuals as the specialists, but in addition forage on smaller or larger prey individuals as well. Furthermore, the chapter shows that two predators that specialize on different life-history stages of prey can facilitate each other to the extent that one predator relies on the presence of the other for its persistence. A stage-specific predator may act as a catalyst species, which promotes and in fact is necessary for the invasion of another predator species, but is subsequently outcompeted by the latter.

Keywords:   predators, prey life history, biomass overcompensation, ecology, ecological dynamics, foraging

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