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dc.contributor.author
Isacch, Juan Pablo
dc.contributor.author
Maceira, Nestor Oscar
dc.contributor.author
Bo, M. S.
dc.contributor.author
Demaría, Manuel
dc.contributor.author
Peluc, Susana Ines
dc.date.available
2024-07-25T12:55:27Z
dc.date.issued
2005-07
dc.identifier.citation
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
dc.identifier.issn
0140-1963
dc.identifier.uri
http://hdl.handle.net/11336/240880
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Academic Press Ltd - Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
West pampas
dc.subject
Semi-arid grasslands
dc.subject
Bird diversity
dc.subject
Pastures
dc.subject.classification
Ecología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Bird-habitat relationship in semi-arid natural grasslands and exotic pastures in the west pampas of Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-07-10T14:30:25Z
dc.journal.volume
62
dc.journal.number
2
dc.journal.pagination
267-283
dc.journal.pais
Estados Unidos
dc.description.fil
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
dc.description.fil
Fil: Maceira, Nestor Oscar. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.description.fil
Fil: Bo, M. S.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Biología; Argentina
dc.description.fil
Fil: Demaría, Manuel. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.description.fil
Fil: Peluc, Susana Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. University of California; Estados Unidos
dc.journal.title
Journal of Arid Environments
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196305000042
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jaridenv.2004.11.008
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