Long-Term Dynamics in a Metapopulation of the American Pika

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dc.contributor.author Moilanen, Atte en
dc.contributor.author Smith, Andrew en
dc.contributor.author Hanski, Ilkka en
dc.contributor.other Department of Ecology and Systematics, Division of Population Biology, P.O. Box 17 (Arkadiankatu 7), FIN-00014 University of Helsinki, Finland en
dc.date.accessioned 2007-11-22T15:14:41Z en
dc.date.accessioned 2009-06-17T14:02:40Z
dc.date.available 2007-11-22T15:14:41Z en
dc.date.available 2009-06-17T14:02:40Z
dc.date.issued 1998 en
dc.identifier.citation The American Naturalist. 152(4): 530–542. 1998 en
dc.identifier.issn 0003-0147 en
dc.identifier.uri http://dx.doi.org/10.1086/286188 en
dc.identifier.uri http://hdl.handle.net/1975/7568
dc.description.abstract A 20-yr study of a metapopulation of the American pika revealed a regional decline in occupancy in one part of a large network of habitat patches. We analyze the possible causes of this decline using a spatially realistic metapopulation model, the incidence function model. The pika metapopulation is the best-known mammalian example of a classical metapopulation with significant population turnover, and it satisfies closely the assumptions of the incidence function model, which was parameterized with data on patch occupancy. The model-predicted incidences of patch occupancy are consistent with observed incidences, and the model predicts well the observed turnover rate between four metapopulation censuses. According to model predictions, the part of the metapopulation where the decline has been observed is relatively unstable and prone to large oscillations in patch occupancy, whereas the other part of the metapopulation is predicted to be persistent. These results demonstrate how extinction-colonization dynamics may produce spatially correlated patterns of patch occupancy without any spatially correlated processes in local dynamics or extinction rate. The unstable part of the metapopulation gives an empirical example of multiple quasi equilibria in metapopulation dynamics. Phenomena similar to those observed here may cause fluctuations in species' range limits. en
dc.language.iso en en
dc.subject metapopulation en
dc.subject incidence function en
dc.subject Ochotona princeps en
dc.subject regional stochasticity en
dc.subject multiple equilibria en
dc.subject stepping-stone en
dc.title Long-Term Dynamics in a Metapopulation of the American Pika en
dc.type Article en
dc.identifier.laitoskoodi B571151 fi
dc.creator.corporateName Metapopulaatiobiologian tutkimusryhmä (Bio- ja ympäristötieteiden laitos. Ekologia ja evoluutiobiologia) fi
dc.creator.corporateName Metapopulation Research Group (Department of Biological and Environmental Sciences. Ecology a nd Evolutionary Biology) en
dc.creator.corporateName Metapopulationsbiologi, Forskningsgruppen för (Institutionen för bio- och miljövetenskaper. Ekologi och evolutionsbiologi) sv

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