SPATIOTEMPORAL PATTERNS OF AN IRRUPTION AND DECLINE OF SMALL MAMMALS IN NORTHCENTRAL CHILE

dc.contributor.authorJIMENEZ, JE
dc.contributor.authorFEINSINGER, P
dc.contributor.authorJAKSIC, FM
dc.date.accessioned2025-01-23T19:22:10Z
dc.date.available2025-01-23T19:22:10Z
dc.date.issued1992
dc.description.abstractDuring the austral winter of 1987 (June-August) at a semi-arid site in northcentral Chile, an outbreak of small mammals apparently was triggered by one episode of unusually high rainfall. From October 1987 to November 1990, we monitored the outbreak on a monthly basis on two equatorial- and two polar-facing slopes. Overall density on equatorial-facing slopes was 239 individuals/ha in spring 1987, increasing to a peak of 404/ha by summer 1988, and then steadily declining to a crash of 20/ha (5% of peak density) by spring 1990, with no signs of recovery. On polar-facing slopes, mammalian abundances were about one-half those of equatorial-facing slopes. There were 112 individuals/ha in spring 1987, increasing to a peak of 199/ha by summer 1988, and then steadily declining to a crash of 8/ha (4% of peak density) by spring 1989. Since then, mammal populations on polar-facing slopes have been slowly recovering, reaching 11% of their peak density by November 1990. Of the eight species monitored, only three irrupted: the granivorous cricetid Phyllotis darwini, the omnivorous cricetid Akodon olivaceus, and the insectivorous didelphid Marmosa elegans. These three irrupted and declined in phase, simultaneously on the two opposite-facing slopes, such that their relative frequencies did not shift markedly. Two of the three folivores (Abrocoma bennettii, Octodon degus, but not Chinchilla lanigera), one granivore (Oryzomys longicaudatus), and one insectivore (Akodon longipilis) disappeared from the site, persisting longer on equatorial-facing slopes.
dc.fuente.origenWOS
dc.identifier.issn0022-2372
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/98983
dc.identifier.wosidWOS:A1992HW96500016
dc.issue.numero2
dc.language.isoen
dc.pagina.final364
dc.pagina.inicio356
dc.revistaJournal of mammalogy
dc.rightsacceso restringido
dc.subjectSPATIOTEMPORAL PATTERNS
dc.subjectPOPULATION DENSITY
dc.subjectCHILE
dc.subjectRODENTIA
dc.subjectMARMOSA
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.titleSPATIOTEMPORAL PATTERNS OF AN IRRUPTION AND DECLINE OF SMALL MAMMALS IN NORTHCENTRAL CHILE
dc.typeartículo
dc.volumen73
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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