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Abstract:

During the past century, the Pampas meadowlark Sturnella defilippii underwent a severe population drop and now, it is confined mostly to southern Pampas grasslands. We analyzed the habitat and landscape characteristics associated to the presence of reproductive groups of Pampas meadowlarks in this area. During the 1999 breeding season, we surveyed 89 randomly stratified selected points where we noted the presence/absence of Pampas meadowlarks. For each point we estimated seven habitat variables related to vegetation cover and six landscape variables derived from different maps. We found 11 groups of displaying males, nine of them on natural grassland plots. Multivariate analyses indicate that field type and vegetation cover are the main factors associated to the presence of Pampas meadowlark. Reproductive groups were found preferentially at natural grasslands with high vegetation cover. Habitat loss and intensive grazing of fields appear to be the main factors associated to their sharp population decline and distribution retraction. © 2003 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Bird-habitat relationship for the declining Pampas meadowlark populations in the southern Pampas grasslands
Autor:Fernández, G.J.; Posse, G.; Ferretti, V.; Gabelli, F.M.
Filiación:Depto. de Ecologia, Genet. y Evol., Fac. de Ciencias Exactas y Naturales, Pabellòn II, (C1428EHA) Ciudad de Buenos Aires, Argentina
Facultad de Psicología, Universidad de Buenos Aires, Inst. de Biol. y Med. Exp.-CONICET, Vuelta de Obligado 2490, (1428) Ciudad de Buenos Aires, Argentina
Instituto de Clima y Agua, Inst. Nac. de Tecn. Agropecuaria, Las Cabañas y Los Reseros s/n, Provincia de Buenos Aires, Argentina
Palabras clave:Habitat transformation; Pampas grasslands; Pampas meadowlark; Population decline; Sturnella defilippii; grassland; grazing; habitat loss; passerine; population decline; vegetation cover; Argentina; Pampas; Aves; Sturnella; Sturnella defilippii; Sturnella defilippii
Año:2004
Volumen:115
Número:1
Página de inicio:139
Página de fin:148
DOI: http://dx.doi.org/10.1016/S0006-3207(03)00103-4
Título revista:Biological Conservation
Título revista abreviado:Biol. Conserv.
ISSN:00063207
CODEN:BICOB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00063207_v115_n1_p139_Fernandez

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Citas:

---------- APA ----------
Fernández, G.J., Posse, G., Ferretti, V. & Gabelli, F.M. (2004) . Bird-habitat relationship for the declining Pampas meadowlark populations in the southern Pampas grasslands. Biological Conservation, 115(1), 139-148.
http://dx.doi.org/10.1016/S0006-3207(03)00103-4
---------- CHICAGO ----------
Fernández, G.J., Posse, G., Ferretti, V., Gabelli, F.M. "Bird-habitat relationship for the declining Pampas meadowlark populations in the southern Pampas grasslands" . Biological Conservation 115, no. 1 (2004) : 139-148.
http://dx.doi.org/10.1016/S0006-3207(03)00103-4
---------- MLA ----------
Fernández, G.J., Posse, G., Ferretti, V., Gabelli, F.M. "Bird-habitat relationship for the declining Pampas meadowlark populations in the southern Pampas grasslands" . Biological Conservation, vol. 115, no. 1, 2004, pp. 139-148.
http://dx.doi.org/10.1016/S0006-3207(03)00103-4
---------- VANCOUVER ----------
Fernández, G.J., Posse, G., Ferretti, V., Gabelli, F.M. Bird-habitat relationship for the declining Pampas meadowlark populations in the southern Pampas grasslands. Biol. Conserv. 2004;115(1):139-148.
http://dx.doi.org/10.1016/S0006-3207(03)00103-4