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Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
Published on: July 3, 2007
Metapopulation theory for fragmented landscapes
Ilkka Hanski1, Otso Ovaskainen
1Department of Ecology and Systematics, Metapopulation Research Group, Division of Population Biology, University of Helsinki, P.O. Box 65, Viikinkaari 1, FIN-00014, Helsinki, Finland. ilkka.hanski@helsinki.fi
Abstract:
We review recent developments in spatially realistic metapopulation theory, which leads to quantitative models of the dynamics of species inhabiting highly fragmented landscapes. Our emphasis is in stochastic patch occupancy models, which describe the presence or absence of the focal species in habitat patches. We discuss a number of ecologically important quantities that can be derived from the full stochastic models and their deterministic approximations, with a particular aim of characterizing the respective roles of the structure of the landscape and the properties of the species. These quantities include the threshold condition for persistence, the contributions that individual habitat patches make to metapopulation dynamics and persistence, the time to metapopulation extinction, and the effective size of a metapopulation living in a heterogeneous patch network.
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