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How Levins’ dynamics emerges from a Ricker metapopulation model

Författare och institution:
Federico Elias Wolff (Institutionen för fysik (GU)); Anders Eriksson (-); Andrea Manica (-); Bernhard Mehlig (Institutionen för fysik (GU) & Linnécentrum för marin evolutionsbiologi (CEMEB))
Publicerad i:
Theoretical Ecology, 9 ( 2 ) s. 173-183
ISSN:
1874-1738
E-ISSN:
1874-1746
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Understanding the dynamics of metapopulations close to extinction is of vital importance for management. Levins-like models, in which local patches are treated as either occupied or empty, have been used extensively to explore the extinction dynamics of metapopulations, but they ignore the important role of local population dynamics. In this paper, we consider a stochastic metapopulation model where local populations follow a stochastic, density-dependent dynamics (the Ricker model), and use this framework to investigate the behaviour of the metapopulation on the brink of extinction. We determine under which circumstances the metapopulation follows a time evolution consistent with Levins’ dynamics. We derive analytical expressions for the colonisation and extinction rates (c and e) in Levins-type models in terms of reproduction, survival and dispersal parameters of the local populations, providing an avenue to parameterising Levins-like models from the type of information on local demography that is available for a number of species. To facilitate applying our results, we provide a numerical algorithm for computing c and e.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Biologiska vetenskaper
Nyckelord:
Colonisation, Extinction, Metapopulation, Levins’ equation, Ricker model
Postens nummer:
223590
Posten skapad:
2015-10-02 11:08
Posten ändrad:
2016-04-29 13:36

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