Book chapter

Can Initial Invasion Dynamics Correctly Predict Phenotypic Substitutions?


S.D. Mylius, M. Doebeli & O. Diekmann, 1999.  To appear in: U. Dieckmann & J.A.J. Metz (eds.), Elements of Adaptive Dynamics.  Cambridge University Press, Cambridge, U.K.


Abstract

In this chapter, we study invasibility and evolutionary stability under the condition that population dynamics do not lead to a steady state. We analyze two example models to do this. The first example deals with a temporally structured population, and studies the timing of reproduction of semelparous individuals. The second one considers a spatially structured population, and studies the rate of dispersal in a metapopulation. In both systems several population dynamic attractors can coexist. These attractors, which can be periodic and/or chaotic, can have different invasion properties. Moreover, successful invasion by a mutant strategy from one attractor can be followed by extinction of the former invader, caused by a switch of the resident system to another attractor. In other words, the resident strategy is ``invasible, yet unbeatable''. We discuss how this phenomenon of resilience relates to the theory of Adaptive Dynamics developed so far.


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