Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia

The Lesser Rhea (Rhea pennata pennata) has suffered a marked decline in numbers over recent decades, probably mainly as a result of livestock production and overhunting. Our aim was to investigate the factors that determine the distribution of Lesser Rheas in southern Patagonia and to generate a pre...

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Detalhes bibliográficos
Autores: Pedrana, Julieta, Bustamante, Javier, Travaini, Alejandro, Rodríguez, Alejandro, Zapata, Sonia C., Zanón, Juan I., Procopio, Diego
Tipo de documento: artigo
Data de publicação:2011
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/46639
Acesso em linha:http://hdl.handle.net/10261/46639
Access Level:Acceso aberto
Palavra-chave:Argentina
large-scale habitat models
ratite ecology
species distribution maps
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spelling Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern PatagoniaPedrana, JulietaBustamante, JavierTravaini, AlejandroRodríguez, AlejandroZapata, Sonia C.Zanón, Juan I.Procopio, DiegoArgentinalarge-scale habitat modelsratite ecologyspecies distribution mapsThe Lesser Rhea (Rhea pennata pennata) has suffered a marked decline in numbers over recent decades, probably mainly as a result of livestock production and overhunting. Our aim was to investigate the factors that determine the distribution of Lesser Rheas in southern Patagonia and to generate a predictive regional distribution map. We surveyed 8000 km of roads and sighted 795 Lesser Rhea individuals or flocks. We also estimated environmental predictors from remotely sensed data and analysed the occurrence of Lesser Rheas in relation to these predictors. The predictors we examined were associated with four hypotheses explaining the distribution of Lesser Rheas: the persecution by ranchers, primary productivity, topography, and anthropogenic disturbance hypotheses. We built models for each hypothesis. Our results suggest that the distribution of Lesser Rheas is not negatively affected by persecution by ranchers, as the species is more abundant in areas with high stocking levels of sheep, but is positively influenced by primary productivity and negatively by the proximity of human habitation. The resulting distribution map can be used as a management tool for government agencies and highlights the conservation priorities for managing this declining and emblematic species.Peer reviewedCSIRO Publishing201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/46639reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.publish.csiro.au/?act=view_file&file_id=MU11007.pdfinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/466392026-05-22T06:33:51Z
dc.title.none.fl_str_mv Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
title Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
spellingShingle Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
Pedrana, Julieta
Argentina
large-scale habitat models
ratite ecology
species distribution maps
title_short Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
title_full Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
title_fullStr Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
title_full_unstemmed Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
title_sort Environmental factors influencing the distribution of the Lesser Rhea (Rhea pennata pennata) in southern Patagonia
dc.creator.none.fl_str_mv Pedrana, Julieta
Bustamante, Javier
Travaini, Alejandro
Rodríguez, Alejandro
Zapata, Sonia C.
Zanón, Juan I.
Procopio, Diego
author Pedrana, Julieta
author_facet Pedrana, Julieta
Bustamante, Javier
Travaini, Alejandro
Rodríguez, Alejandro
Zapata, Sonia C.
Zanón, Juan I.
Procopio, Diego
author_role author
author2 Bustamante, Javier
Travaini, Alejandro
Rodríguez, Alejandro
Zapata, Sonia C.
Zanón, Juan I.
Procopio, Diego
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Argentina
large-scale habitat models
ratite ecology
species distribution maps
topic Argentina
large-scale habitat models
ratite ecology
species distribution maps
description The Lesser Rhea (Rhea pennata pennata) has suffered a marked decline in numbers over recent decades, probably mainly as a result of livestock production and overhunting. Our aim was to investigate the factors that determine the distribution of Lesser Rheas in southern Patagonia and to generate a predictive regional distribution map. We surveyed 8000 km of roads and sighted 795 Lesser Rhea individuals or flocks. We also estimated environmental predictors from remotely sensed data and analysed the occurrence of Lesser Rheas in relation to these predictors. The predictors we examined were associated with four hypotheses explaining the distribution of Lesser Rheas: the persecution by ranchers, primary productivity, topography, and anthropogenic disturbance hypotheses. We built models for each hypothesis. Our results suggest that the distribution of Lesser Rheas is not negatively affected by persecution by ranchers, as the species is more abundant in areas with high stocking levels of sheep, but is positively influenced by primary productivity and negatively by the proximity of human habitation. The resulting distribution map can be used as a management tool for government agencies and highlights the conservation priorities for managing this declining and emblematic species.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/46639
url http://hdl.handle.net/10261/46639
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://www.publish.csiro.au/?act=view_file&file_id=MU11007.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv CSIRO Publishing
publisher.none.fl_str_mv CSIRO Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812455

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