Population variability among three small mammal species in the semiarid Neotropics: The role of density-dependent and density-independent factors

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dc.contributor.authorLima, M
dc.contributor.authorJaksic, FM
dc.date.accessioned2025-01-21T01:32:45Z
dc.date.available2025-01-21T01:32:45Z
dc.date.issued1998
dc.description.abstractWe addressed the role of density-dependent (direct and delayed) and density-independent (precipitation) factors in shaping the dynamics of fluctuating populations of three small mammal species. Using a stepwise regression procedure, we tested the effects of nonlagged population density (log(10)N(t-1)), lagged population density (log(10)N(t-2)), and annual precipitation on the per capita rate of population change of Phyllotis darwini, Akodon olivaceus, and Thylamys elegans in two habitat types of a semiarid region of Chile. The most irruptive species (P. darwini) showed direct and delayed density-dependent effects in equatorial subpopulation, and only direct density-dependence in polar subpopulation. The per capita rates of population change of A. olivaceus showed direct density-dependent and precipitation effects in both habitats types, while T. elegans showed direct density-dependence and precipitation effects in the equatorial subpopulation but only a marginal effect of direct density-dependence in the polar subpopulation. The presence of delayed density-dependent strongly suggests the importance of biological interactions in shaping the dramatic irruptions exhibited by P. darwini.
dc.fuente.origenWOS
dc.identifier.issn0906-7590
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97316
dc.identifier.wosidWOS:000073403700009
dc.issue.numero2
dc.language.isoen
dc.pagina.final180
dc.pagina.inicio175
dc.revistaEcography
dc.rightsacceso restringido
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.titlePopulation variability among three small mammal species in the semiarid Neotropics: The role of density-dependent and density-independent factors
dc.typeartículo
dc.volumen21
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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