Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina

We studied density changes of two groups of Neotropical austral migrant landbirds - the South American temperate-tropical (SATT) and cold-temperate (SACT) migratory systems - in the main habitat types of the central Monte desert of Argentina (open Prosopis flexuosa woodland and Larrea cuneifolia shr...

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Autores principales: Cueto, V.R., de Casenave, J.L., Marone, L.
Formato: JOUR
Materias:
Buff-breasted Sandpiper
Migration
Shorebirds
Stopover
Tryngites subruficollis
Aves
Larrea
Larrea cuneifolia
Prosopis
Prosopis flexuosa
Tryngites
Tyrannidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00105422_v110_n1_p70_Cueto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00105422_v110_n1_p70_Cueto
record_format dspace
spelling todo:paper_00105422_v110_n1_p70_Cueto2023-10-03T14:09:20Z Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina Cueto, V.R. de Casenave, J.L. Marone, L. Buff-breasted Sandpiper Migration Shorebirds Stopover Tryngites subruficollis Aves Larrea Larrea cuneifolia Prosopis Prosopis flexuosa Tryngites Tryngites subruficollis Tyrannidae We studied density changes of two groups of Neotropical austral migrant landbirds - the South American temperate-tropical (SATT) and cold-temperate (SACT) migratory systems - in the main habitat types of the central Monte desert of Argentina (open Prosopis flexuosa woodland and Larrea cuneifolia shrubland) over 10 years. Five species, all tyrant flycatchers (Tyrannidae) made up SATT, whereas only two of the seven species of SACT were tyrannids. Densities of both SATT and SACT were higher in open woodland than in shrubland. SATT density did not differ among years, but SACT density did, having lower values in 1994 in both habitats. In subsequent years, SACT densities increased but did not reach values similar to those previous to 1994. The decline in 1994 coincided with a two-year drought period that began in 1993, but lower density in the following years did not appear to be related to climatic conditions in the study area, suggesting a low capacity of SACT species to recover population abundance after periods of stress. In contrast, SATT density was not associated with local climatic conditions, possibly because several SATT species used the study area only as a stopover site. During the breeding season, birds of both migratory systems disproportionately use the open woodland, which offers more sites to nest and feed than does the shrubland. Although most SATT and SACT species are abundant and not currently of conservation concern, human activities in the central Monte desert promote the structural simplification of the habitat, which could threaten future populations of Neotropical austral migrant landbirds in this ecosystem. © The Cooper Ornithological Society 2008. Fil:Cueto, V.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:de Casenave, J.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00105422_v110_n1_p70_Cueto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Buff-breasted Sandpiper
Migration
Shorebirds
Stopover
Tryngites subruficollis
Aves
Larrea
Larrea cuneifolia
Prosopis
Prosopis flexuosa
Tryngites
Tryngites subruficollis
Tyrannidae
spellingShingle Buff-breasted Sandpiper
Migration
Shorebirds
Stopover
Tryngites subruficollis
Aves
Larrea
Larrea cuneifolia
Prosopis
Prosopis flexuosa
Tryngites
Tryngites subruficollis
Tyrannidae
Cueto, V.R.
de Casenave, J.L.
Marone, L.
Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
topic_facet Buff-breasted Sandpiper
Migration
Shorebirds
Stopover
Tryngites subruficollis
Aves
Larrea
Larrea cuneifolia
Prosopis
Prosopis flexuosa
Tryngites
Tryngites subruficollis
Tyrannidae
description We studied density changes of two groups of Neotropical austral migrant landbirds - the South American temperate-tropical (SATT) and cold-temperate (SACT) migratory systems - in the main habitat types of the central Monte desert of Argentina (open Prosopis flexuosa woodland and Larrea cuneifolia shrubland) over 10 years. Five species, all tyrant flycatchers (Tyrannidae) made up SATT, whereas only two of the seven species of SACT were tyrannids. Densities of both SATT and SACT were higher in open woodland than in shrubland. SATT density did not differ among years, but SACT density did, having lower values in 1994 in both habitats. In subsequent years, SACT densities increased but did not reach values similar to those previous to 1994. The decline in 1994 coincided with a two-year drought period that began in 1993, but lower density in the following years did not appear to be related to climatic conditions in the study area, suggesting a low capacity of SACT species to recover population abundance after periods of stress. In contrast, SATT density was not associated with local climatic conditions, possibly because several SATT species used the study area only as a stopover site. During the breeding season, birds of both migratory systems disproportionately use the open woodland, which offers more sites to nest and feed than does the shrubland. Although most SATT and SACT species are abundant and not currently of conservation concern, human activities in the central Monte desert promote the structural simplification of the habitat, which could threaten future populations of Neotropical austral migrant landbirds in this ecosystem. © The Cooper Ornithological Society 2008.
format JOUR
author Cueto, V.R.
de Casenave, J.L.
Marone, L.
author_facet Cueto, V.R.
de Casenave, J.L.
Marone, L.
author_sort Cueto, V.R.
title Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
title_short Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
title_full Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
title_fullStr Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
title_full_unstemmed Neotropical austral migrant landbirds: Population trends and habitat use in the Central Monte Desert, Argentina
title_sort neotropical austral migrant landbirds: population trends and habitat use in the central monte desert, argentina
url http://hdl.handle.net/20.500.12110/paper_00105422_v110_n1_p70_Cueto
work_keys_str_mv AT cuetovr neotropicalaustralmigrantlandbirdspopulationtrendsandhabitatuseinthecentralmontedesertargentina
AT decasenavejl neotropicalaustralmigrantlandbirdspopulationtrendsandhabitatuseinthecentralmontedesertargentina
AT maronel neotropicalaustralmigrantlandbirdspopulationtrendsandhabitatuseinthecentralmontedesertargentina
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