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• W1980780893 abstract "The apparent prevalence of intraguild predation in productive environments has been regarded as puzzling because some simple models suggest that the intraguild prey species is often either reduced in abundance or driven extinct at high resource productivity. While various theoretical mechanisms that avoid this prediction have been uncovered, they have often been viewed as being narrowly applicable. This article examines the fate of the intraguild prey in models in which consumer species may have type-2 functional responses; these are usually characterized by sustained fluctuations in population density at high enough resource productivities. The models also include adaptive, but imperfect diet choice by the top predator. We concentrate on two situations: (1) the prey exhibits less saturation in its functional response to the resource than does the predator and (2) the predator is unable to persist on the basal resource alone. The reasons given by previous studies for discounting these cases are re-examined. The present analysis shows that prey abundance often increases with increasing productivity in both cases, as does the range of prey parameters that allows prey persistence. It is also possible for the prey to coexist with the predator in spite of having a larger equilibrium requirement for the resource. Different assumptions about the dynamics of diet choice can have a large impact on population responses to enrichment. We argue that the persistence and/or increase in abundance of intraguild prey at higher productivity should not be regarded as puzzling because observations are consistent with a range of theoretical models that reflect commonly observed mechanisms." @default.
• W1980780893 created "2016-06-24" @default.
• W1980780893 creator A5041885226 @default.
• W1980780893 creator A5074260133 @default.
• W1980780893 date "2010-06-01" @default.
• W1980780893 modified "2023-09-27" @default.
• W1980780893 title "Prey persistence and abundance in systems with intraguild predation and type-2 functional responses" @default.
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• W1980780893 doi "https://doi.org/10.1016/j.jtbi.2010.02.045" @default.
• W1980780893 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20223250" @default.
• W1980780893 hasPublicationYear "2010" @default.
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