Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina

Autores
Isacch, Juan Pablo; Maceira, Nestor Oscar; Bo, M. S.; Demaría, Manuel; Peluc, Susana Ines
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the semi-arid grasslands of the west pampas, in Argentina, extended natural grasslands still persist only with cattle grazing. However, in the last years there has been an important increase in the cultivation of African pasture species. We evaluated the incidence of the replacement of natural grasslands by exotic pastures on bird diversity in spring summer and in winter. In five different grassland habitats (two native and three sown pastures), we sampled bird populations using the strip transect method and vegetation variables simultaneously at the same sites. We used multiple regressions to examine the relative importance of habitat variables on richness, abundance and presence of bird species. The replacement of native grasslands (Sorgastral) by sown pastures results in habitat modifications such as changes in green vegetation, percentage of bare ground and distance to trees. When native grasslands are moderately grazed (mixed grassland) plant species richness increases notably relative to other native and exotic pastures. Some vegetation variables were correlated with bird species richness or with some bird populations. However, the habitat variable that best described bird species richness and bird abundance was plant species richness, which varied both with the grazing history of the native grassland and with the type of pasture used as replacement. Consequently, grassland replacement by sown pastures in the west pampas results in changes in bird alpha diversity; decreasing diversity with respect to mixed grasslands, but favoring it in relation to the climax grassland (Sorgastral). The composition of grassland bird communities in natural grasslands would be little affected by exotic pastures replacement. However, since some vegetation variables best represented in some habitats had particular effects on the abundance and presence of specific grassland birds, managers and policy makers should take into account the complexity of the processes associated with changes in land use of the west pampas. This would not only decrease the probability of negative effects on the total bird diversity but also would decrease the risk of local extinction of declining species.
Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina
Fil: Maceira, Nestor Oscar. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Bo, M. S.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina
Fil: Demaría, Manuel. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Peluc, Susana Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of California; Estados Unidos
Materia
West pampas
Semi-arid grasslands
Bird diversity
Pastures
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/240880

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network_name_str CONICET Digital (CONICET)
spelling Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of ArgentinaIsacch, Juan PabloMaceira, Nestor OscarBo, M. S.Demaría, ManuelPeluc, Susana InesWest pampasSemi-arid grasslandsBird diversityPastureshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1In the semi-arid grasslands of the west pampas, in Argentina, extended natural grasslands still persist only with cattle grazing. However, in the last years there has been an important increase in the cultivation of African pasture species. We evaluated the incidence of the replacement of natural grasslands by exotic pastures on bird diversity in spring summer and in winter. In five different grassland habitats (two native and three sown pastures), we sampled bird populations using the strip transect method and vegetation variables simultaneously at the same sites. We used multiple regressions to examine the relative importance of habitat variables on richness, abundance and presence of bird species. The replacement of native grasslands (Sorgastral) by sown pastures results in habitat modifications such as changes in green vegetation, percentage of bare ground and distance to trees. When native grasslands are moderately grazed (mixed grassland) plant species richness increases notably relative to other native and exotic pastures. Some vegetation variables were correlated with bird species richness or with some bird populations. However, the habitat variable that best described bird species richness and bird abundance was plant species richness, which varied both with the grazing history of the native grassland and with the type of pasture used as replacement. Consequently, grassland replacement by sown pastures in the west pampas results in changes in bird alpha diversity; decreasing diversity with respect to mixed grasslands, but favoring it in relation to the climax grassland (Sorgastral). The composition of grassland bird communities in natural grasslands would be little affected by exotic pastures replacement. However, since some vegetation variables best represented in some habitats had particular effects on the abundance and presence of specific grassland birds, managers and policy makers should take into account the complexity of the processes associated with changes in land use of the west pampas. This would not only decrease the probability of negative effects on the total bird diversity but also would decrease the risk of local extinction of declining species.Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; ArgentinaFil: Maceira, Nestor Oscar. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Bo, M. S.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; ArgentinaFil: Demaría, Manuel. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Peluc, Susana Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of California; Estados UnidosAcademic Press Ltd - Elsevier Science Ltd2005-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/240880Isacch, Juan Pablo; Maceira, Nestor Oscar; Bo, M. S.; Demaría, Manuel; Peluc, Susana Ines; Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 62; 2; 7-2005; 267-2830140-1963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196305000042info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2004.11.008info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:09:53Zoai:ri.conicet.gov.ar:11336/240880instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:09:53.724CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
title Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
spellingShingle Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
Isacch, Juan Pablo
West pampas
Semi-arid grasslands
Bird diversity
Pastures
title_short Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
title_full Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
title_fullStr Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
title_full_unstemmed Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
title_sort Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
dc.creator.none.fl_str_mv Isacch, Juan Pablo
Maceira, Nestor Oscar
Bo, M. S.
Demaría, Manuel
Peluc, Susana Ines
author Isacch, Juan Pablo
author_facet Isacch, Juan Pablo
Maceira, Nestor Oscar
Bo, M. S.
Demaría, Manuel
Peluc, Susana Ines
author_role author
author2 Maceira, Nestor Oscar
Bo, M. S.
Demaría, Manuel
Peluc, Susana Ines
author2_role author
author
author
author
dc.subject.none.fl_str_mv West pampas
Semi-arid grasslands
Bird diversity
Pastures
topic West pampas
Semi-arid grasslands
Bird diversity
Pastures
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In the semi-arid grasslands of the west pampas, in Argentina, extended natural grasslands still persist only with cattle grazing. However, in the last years there has been an important increase in the cultivation of African pasture species. We evaluated the incidence of the replacement of natural grasslands by exotic pastures on bird diversity in spring summer and in winter. In five different grassland habitats (two native and three sown pastures), we sampled bird populations using the strip transect method and vegetation variables simultaneously at the same sites. We used multiple regressions to examine the relative importance of habitat variables on richness, abundance and presence of bird species. The replacement of native grasslands (Sorgastral) by sown pastures results in habitat modifications such as changes in green vegetation, percentage of bare ground and distance to trees. When native grasslands are moderately grazed (mixed grassland) plant species richness increases notably relative to other native and exotic pastures. Some vegetation variables were correlated with bird species richness or with some bird populations. However, the habitat variable that best described bird species richness and bird abundance was plant species richness, which varied both with the grazing history of the native grassland and with the type of pasture used as replacement. Consequently, grassland replacement by sown pastures in the west pampas results in changes in bird alpha diversity; decreasing diversity with respect to mixed grasslands, but favoring it in relation to the climax grassland (Sorgastral). The composition of grassland bird communities in natural grasslands would be little affected by exotic pastures replacement. However, since some vegetation variables best represented in some habitats had particular effects on the abundance and presence of specific grassland birds, managers and policy makers should take into account the complexity of the processes associated with changes in land use of the west pampas. This would not only decrease the probability of negative effects on the total bird diversity but also would decrease the risk of local extinction of declining species.
Fil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina
Fil: Maceira, Nestor Oscar. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Bo, M. S.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina
Fil: Demaría, Manuel. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Peluc, Susana Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of California; Estados Unidos
description In the semi-arid grasslands of the west pampas, in Argentina, extended natural grasslands still persist only with cattle grazing. However, in the last years there has been an important increase in the cultivation of African pasture species. We evaluated the incidence of the replacement of natural grasslands by exotic pastures on bird diversity in spring summer and in winter. In five different grassland habitats (two native and three sown pastures), we sampled bird populations using the strip transect method and vegetation variables simultaneously at the same sites. We used multiple regressions to examine the relative importance of habitat variables on richness, abundance and presence of bird species. The replacement of native grasslands (Sorgastral) by sown pastures results in habitat modifications such as changes in green vegetation, percentage of bare ground and distance to trees. When native grasslands are moderately grazed (mixed grassland) plant species richness increases notably relative to other native and exotic pastures. Some vegetation variables were correlated with bird species richness or with some bird populations. However, the habitat variable that best described bird species richness and bird abundance was plant species richness, which varied both with the grazing history of the native grassland and with the type of pasture used as replacement. Consequently, grassland replacement by sown pastures in the west pampas results in changes in bird alpha diversity; decreasing diversity with respect to mixed grasslands, but favoring it in relation to the climax grassland (Sorgastral). The composition of grassland bird communities in natural grasslands would be little affected by exotic pastures replacement. However, since some vegetation variables best represented in some habitats had particular effects on the abundance and presence of specific grassland birds, managers and policy makers should take into account the complexity of the processes associated with changes in land use of the west pampas. This would not only decrease the probability of negative effects on the total bird diversity but also would decrease the risk of local extinction of declining species.
publishDate 2005
dc.date.none.fl_str_mv 2005-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/240880
Isacch, Juan Pablo; Maceira, Nestor Oscar; Bo, M. S.; Demaría, Manuel; Peluc, Susana Ines; Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 62; 2; 7-2005; 267-283
0140-1963
CONICET Digital
CONICET
url http://hdl.handle.net/11336/240880
identifier_str_mv Isacch, Juan Pablo; Maceira, Nestor Oscar; Bo, M. S.; Demaría, Manuel; Peluc, Susana Ines; Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 62; 2; 7-2005; 267-283
0140-1963
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196305000042
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2004.11.008
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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