Dispersal-induced growth or decay in a time-periodic environment

Dispersal-induced growth or decay in a time-periodic environment

This paper is a follow-up to a previous work where we considered populations with time-varying growth rates living in patches and irreducible migration matrix between the patches. Each population, when isolated, would become extinct. Dispersal-induced growth (DIG) occurs when the populations are abl...

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Hauptverfasser: Benaim, Michel, Lobry, Claude, Sari, Tewfik, Strickler, Edouard
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Lobry, Claude
Sari, Tewfik
Strickler, Edouard
description This paper is a follow-up to a previous work where we considered populations with time-varying growth rates living in patches and irreducible migration matrix between the patches. Each population, when isolated, would become extinct. Dispersal-induced growth (DIG) occurs when the populations are able to persist and grow exponentially when dispersal among the populations is present. We provide a mathematical analysis of this phenomenon, in the context of a deterministic model with periodic variation of growth rates and migration. The migration matrix can be reducible, so that the results apply in the case, important for applications, where there is migration in one direction in one season and in the other direction in another season. We also consider dispersal-induced decay (DID), where each population, when isolated, grows exponentially, while populations die out when dispersal between populations is present.
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