Factors promoting or inhibiting Turing instability in spatially extended prey-predator systems |
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Authors: | Stefano FasaniSergio Rinaldi |
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Institution: | a DEI, Politecnico di Milano, Via Ponzio 34/5, 20133 Milano, Italy b Evolution and Ecology Program, International Institute for Applied Systems Analysis, 2361 Laxenburg, Austria |
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Abstract: | The emergence of inhomogeneities in the distributions of the abundances of spatially extended prey-predator systems is investigated. The method of analysis, based on the notion of diffusive (Turing) instability, is systematically applied to nine different models obtained by introducing an extra-factor into the standard Rosenzweig-MacArthur prey-predator model. The analysis confirms that the standard model is critical in the context of Turing instability, and that the introduction of any small amount of the extra-factor can easily promote or inhibit the emergence of spatial patterns. |
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Keywords: | Prey-predator model Spatial pattern Turing instability Diffusive instability Dispersal |
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