The Effect of Differentiation of Prey Community on Stable Coexistence in a Three-Species Food--Web Model
E. Shchekinova, M. G. J. L\"oder, M. Boersma, K. H. Wiltshire

TL;DR
This study explores how prey community differentiation influences the stable coexistence of predators and resources in a three-species food web with intraguild predation, revealing conditions that promote persistence under varying resource diversity and transfer rates.
Contribution
It introduces a detailed model of a three-species food web with heterogeneous resources and intraguild predation, analyzing stability conditions with resource subpopulations and different IGP modules.
Findings
Stable coexistence depends on enrichment levels and resource transfer rates.
Higher resource diversity can support coexistence at high transfer rates.
Intermediate enrichment favors coexistence at low transfer rates.
Abstract
Food webs with intraguild predation (IGP) are widespread in natural habitats. Their adaptation and resilience behaviour is principal for understanding restructuring of ecological communities. In spite of the importance of IGP food webs their behaviour even for the simplest 3-species systems has not been fully explored. One fundamental question is how an increase of diversity of the lowest trophic level impacts the persistence of higher trophic levels in IGP relationships. We analyze a 3-species food web model with a heterogeneous resources and IGP. The model consists of two predators directly coupled via IGP relation and indirectly via competition for resource. The resource is subdivided into distinct subpopulations. Individuals in the subpopulations are grazed at different rates by the predators. We consider two models: an IGP module with immobilization by the top predator and an IGP…
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Taxonomy
TopicsPlant and animal studies · Plant Parasitism and Resistance · Evolution and Genetic Dynamics
