2005, 2(2): 279-288. doi: 10.3934/mbe.2005.2.279

The Dynamics of the Schoener-Polis-Holt model of Intra-Guild Predation


Department of Mathematics, Providence College, Providence, Rhode Island 02918, United States


Department of Mathematics, College of William and Mary, P.O. Box 8795, Williamsburg, VA 23187-8795, United States

Received  October 2004 Revised  March 2005 Published  March 2005

Intraguild predation occurs when one species (the intraguild predator) predates on and competes with another species (the intraguild prey). A classic model of this interaction was introduced by Gary Polis and Robert Holt building on a model of competing species by Thomas Schoener. A global analysis reveals that this model exhibits generically six dynamics: extinction of one or both species; coexistence about a globally stable equilibrium; contingent exclusion in which the first established species prevents the establishment of the other species; contingent coexistence in which coexistence or displacement of the intraguild prey depend on initial conditions; exclusion of the intraguild prey; and exclusion of the intraguild predator. Implications for biological control and community ecology are discussed.
Citation: Eric Ruggieri, Sebastian J. Schreiber. The Dynamics of the Schoener-Polis-Holt model of Intra-Guild Predation. Mathematical Biosciences & Engineering, 2005, 2 (2) : 279-288. doi: 10.3934/mbe.2005.2.279

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