El Nino-southern oscillation-driven rainfall variability and delayed density dependence cause rodent outbreaks in western South America: Linking demography and population dynamics

Simple item page
dc.contributor.authorLima, M
dc.contributor.authorKeymer, JE
dc.contributor.authorJaksic, FM
dc.date.accessioned2024-01-10T13:47:59Z
dc.date.available2024-01-10T13:47:59Z
dc.date.issued1999
dc.description.abstractIt is well known that some rodent populations display dramatic density fluctuations in semiarid regions of western South America after the unusual rainfall levels associated with El Nino-southern oscillation (ENSO) disturbances. These correlated phenomena have led some ecologists to believe that rodent outbreaks are determined solely by density-independent factors (e.g., rainfall regime). However, demographic studies have detected strong delayed density-dependent effects in one of the most irruptive rodent species, the leaf-eared mouse Phyllotis darwini. We tested the effects of rainfall and delayed density-dependent factors by constructing a structured model based on demographic data estimated from a capture-mark-recapture study of this species in Chile. A model including both rainfall and delayed density-dependent effects predicts the observed population dynamics rather accurately over a 10-yr period. Interestingly, small changes in model parameters result in large changes in model dynamics, which strongly suggests that local variations in demographic features are important in explaining the asynchronous pattern in outbreak occurrences. These findings suggest that inextricably intertwined endogenous and exogenous forces cause rodent outbreaks in western South America. The former are characterized by delayed nonlinear feedbacks, whereas the latter are characterized by the positive effects of the El Nino phases and the negative effects of the La Nina phases of the ENSO disturbance.
dc.fechaingreso.objetodigital2024-05-09
dc.format.extent16 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1086/303191
dc.identifier.eissn1537-5323
dc.identifier.issn0003-0147
dc.identifier.pubmedidMEDLINE:29578796
dc.identifier.urihttps://doi.org/10.1086/303191
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79323
dc.identifier.wosidWOS:000080950400003
dc.information.autorucCiencias Biológicas;Jaksic FM;S/I;99787
dc.information.autorucCiencias Biológicas;Lima M;S/I;96853
dc.issue.numero5
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final491
dc.pagina.inicio476
dc.publisherUNIV CHICAGO PRESS
dc.revistaAMERICAN NATURALIST
dc.rightsacceso restringido
dc.subjectdemography
dc.subjectENSO
dc.subjectdelayed density dependence
dc.subjectrodent outbreaks
dc.subjectSEMIARID NEOTROPICAL SITE
dc.subjectLONG-TERM
dc.subjectSMALL MAMMALS
dc.subjectFUNCTIONAL-RESPONSE
dc.subjectCHILE
dc.subjectPREDATION
dc.subjectGRADIENT
dc.subjectBEHAVIOR
dc.subjectCYCLES
dc.subjectVOLE
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleEl Nino-southern oscillation-driven rainfall variability and delayed density dependence cause rodent outbreaks in western South America: Linking demography and population dynamics
dc.typeartículo
dc.volumen153
sipa.codpersvinculados99787
sipa.codpersvinculados96853
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2024-05-09. El Nino-southern oscillation-driven rainfall variability and delayed density dependence cause rodent outbreaks in western South America - Linking demography and population dynamics.pdf
Size:
3.19 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas