Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile

Large-scale outbreaks of two species of rodents (Oligoryzomys longicaudatus and Abrothrix olivaceus) in response to a large increase in food resources in San Martin Experimental Preserve and in the Peulla area of the Vicente Perez Rosales National Park, were observed during fruiting and seedling of...

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Autores principales:	GONZALEZ,LUZ A, MURUA,ROBERTO, JOFRE,CECILIA
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2000
Materias:	rodent outbreak
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300012
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spelling	oai:scielo:S0716-078X20000003000122000-11-09Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of ChileGONZALEZ,LUZ AMURUA,ROBERTOJOFRE,CECILIA rodent outbreak Large-scale outbreaks of two species of rodents (Oligoryzomys longicaudatus and Abrothrix olivaceus) in response to a large increase in food resources in San Martin Experimental Preserve and in the Peulla area of the Vicente Perez Rosales National Park, were observed during fruiting and seedling of arborescent bamboo (Chusquea spp.). This unique phenomenon enabled the analysis of the effect of increased density on patterns of habitat use by these rodent species with mark-recapture grids in each area. Vegetation analysis was performed at three strata at each capture site. Associations between habitat variables and rodents presence or absence was assessed by using a logistic regressions. Habitat preference was strongly influenced by population density. Vegetation variables were important predictors for the presence of these rodent species only in years of low numbers. The results corroborate the predictions of the Fretwell-Lucas model of habitat selectioninfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.73 n.3 20002000-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300012en10.4067/S0716-078X2000000300012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	rodent outbreak
spellingShingle	rodent outbreak GONZALEZ,LUZ A MURUA,ROBERTO JOFRE,CECILIA Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
description	Large-scale outbreaks of two species of rodents (Oligoryzomys longicaudatus and Abrothrix olivaceus) in response to a large increase in food resources in San Martin Experimental Preserve and in the Peulla area of the Vicente Perez Rosales National Park, were observed during fruiting and seedling of arborescent bamboo (Chusquea spp.). This unique phenomenon enabled the analysis of the effect of increased density on patterns of habitat use by these rodent species with mark-recapture grids in each area. Vegetation analysis was performed at three strata at each capture site. Associations between habitat variables and rodents presence or absence was assessed by using a logistic regressions. Habitat preference was strongly influenced by population density. Vegetation variables were important predictors for the presence of these rodent species only in years of low numbers. The results corroborate the predictions of the Fretwell-Lucas model of habitat selection
author	GONZALEZ,LUZ A MURUA,ROBERTO JOFRE,CECILIA
author_facet	GONZALEZ,LUZ A MURUA,ROBERTO JOFRE,CECILIA
author_sort	GONZALEZ,LUZ A
title	Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
title_short	Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
title_full	Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
title_fullStr	Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
title_full_unstemmed	Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile
title_sort	habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of chile
publisher	Sociedad de Biología de Chile
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300012
work_keys_str_mv	AT gonzalezluza habitatutilizationoftwomuroidspeciesinrelationtopopulationoutbreaksinsoutherntemperateforestsofchile AT muruaroberto habitatutilizationoftwomuroidspeciesinrelationtopopulationoutbreaksinsoutherntemperateforestsofchile AT jofrececilia habitatutilizationoftwomuroidspeciesinrelationtopopulationoutbreaksinsoutherntemperateforestsofchile
_version_	1718439487419187200

Habitat utilization of two muroid species in relation to population outbreaks in southern temperate forests of Chile

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