Modelling dispersal behaviour on a fractal landscape

Andrew J. Tyre, Hugh P. Possingham, David B. Lindenmayer

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We use a spatially explicit population model to explore the population consequences of different habitat selection mechanisms on landscapes with fractal variation in habitat quality. We consider dispersal strategies ranging from random walks to perfect habitat selectors for two species of arboreal marsupial, the greater glider (Petauroides volans) and the mountain brushtail possum (Trichosurus caninus). In this model increasing habitat selection means individuals obtain higher quality territories, but experience increased mortality during dispersal. The net effect is that population sizes are smaller when individuals actively select habitat. We find positive relationships between habitat quality and population size can occur when individuals do not use information about the entire landscape when habitat quality is spatially autocorrelated. We also find that individual behaviour can mitigate the negative effects of spatial variation on population average survival and fecundity.

Original languageEnglish (US)
Pages (from-to)103-113
Number of pages11
JournalEnvironmental Modelling and Software
Volume14
Issue number1
DOIs
StatePublished - Oct 1998

Keywords

  • Dispersal behaviour
  • Fractal landscape
  • Modelling

ASJC Scopus subject areas

  • Software
  • Environmental Engineering
  • Ecological Modeling

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