Food web structure and climate effects on the dynamics of small mammals and owls in semi-arid Chile

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dc.contributor.authorLima, M
dc.contributor.authorStenseth, NC
dc.contributor.authorJaksic, FM
dc.date.accessioned2025-01-21T01:30:28Z
dc.date.available2025-01-21T01:30:28Z
dc.date.issued2002
dc.description.abstractPopulation dynamics of small mammals and predators in semi-arid Chile is positively correlated with rainfall associated with incursions of El Nino (El Nino Southern Oscillation: ENSO). However, the causal relationships between small mammal fluctuations, predator oscillations, and climatic disturbances are poorly understood. Here, we report time series models for three species of small mammal prey and two species of owl predators. The large differences in population fluctuations between the three small mammal species are related to differences in their respective feedback structures. The analyses reveal that per capita growth rate of the leaf-cared mouse is a decreasing function of log density and of log barn owl abundance together with a positive rainfall effect. In turn, per capita population growth rate (R-function) of the barn owl is a negative function of log barn owl abundance and a positive function leaf-eared mouse abundance, suggesting a predator-prey interaction. The dramatic population fluctuations exhibited by leaf-cared mouse (Phyllotis darwini) are caused by climate effects coupled with a complex food web architecture.
dc.fuente.origenWOS
dc.identifier.eissn1461-0248
dc.identifier.issn1461-023X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96772
dc.identifier.wosidWOS:000175119000016
dc.issue.numero2
dc.language.isoen
dc.pagina.final284
dc.pagina.inicio273
dc.revistaEcology letters
dc.rightsacceso restringido
dc.subjectclimate
dc.subjectENSO
dc.subjectfood web structure
dc.subjectmathematical models
dc.subjectowls
dc.subjectpredator-prey dynamics
dc.subjectsemi-arid Chile
dc.subjectsmall mammals
dc.subjecttime series
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleFood web structure and climate effects on the dynamics of small mammals and owls in semi-arid Chile
dc.typeartículo
dc.volumen5
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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