Year class coexistence or competitive exclusion for strict biennials?

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

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    Abstract

    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 R 0 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
    Pages (from-to)95-131
    Number of pages37
    JournalJournal of mathematical biology
    Volume46
    Issue number2
    DOIs
    Publication statusPublished - 2003

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    Keywords

    • Competitive exclusion
    • METIS-209231
    • IR-74624
    • EWI-13998
    • Semelparous species
    • Periodical insects

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