Year Class Coexistence or Competitive Exclusion for Strict Biennials?

N.V. Davydova, O. Diekmann, Stephanus A. van Gils

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    We consider a discrete time model of semelparous biennial population dynamics. Interactions between individuals are modelled with the aid of an 'environmental'' variable I. The impact on and the sensitivity to the environmental condition is age specific. The main result is that competitive exclusion between the year classes is possible as is their coexistence. For moderate values of the basic reproduction ratio R0 there is a strict dichotomy: depending on the other parameters we either find competitive exclusion or coexistence. We characterize rather precisely the patterns of age specific impact and sensitivity that lead to either of these outcomes.
    Original languageEnglish
    Place of PublicationUtrecht
    PublisherUniversiteit Utrecht
    Number of pages28
    Publication statusPublished - 2001

    Publication series

    NamePreprints/ Department of Mathematics
    PublisherDepartment of Mathematics, University of Utrecht


    • METIS-200576


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