Distributional changes of landbird species in agroecosystems of central Argentina

We present the first quantitative comparative study between current (2006-2008) distributions of landbird and those recorded prior to the massive planting of transgenic soy beans in the Pampas of central Argentina (Narosky and Di Giacomo 1993). We surveyed landbirds along transects covering 23 count...

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Autores principales: Codesido, M., González-Fischer, C., Bilenca, D.
Formato: JOUR
Materias:
Agricultural intensification
Agroecosystem
Argentina
Grassland birds
Pampas
Aves
Embernagra platensis
Glycine max
Hymenops perspicillatus
Pseudoleistes virescens
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00105422_v113_n2_p266_Codesido
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00105422_v113_n2_p266_Codesido2023-10-03T14:09:22Z Distributional changes of landbird species in agroecosystems of central Argentina Codesido, M. González-Fischer, C. Bilenca, D. Agricultural intensification Agroecosystem Argentina Grassland birds Pampas Aves Embernagra platensis Glycine max Hymenops perspicillatus Pseudoleistes virescens We present the first quantitative comparative study between current (2006-2008) distributions of landbird and those recorded prior to the massive planting of transgenic soy beans in the Pampas of central Argentina (Narosky and Di Giacomo 1993). We surveyed landbirds along transects covering 23 counties of Buenos Aires province. To allow a comparison between our observations and those of Narosky and Di Giacomo, we used the number of counties in which each species was recorded as an estimate of current and past distributions. We found grassland and wetland specialists in significantly fewer counties than did Narosky and Di Giacomo (P < 0.05), while habitat generalists and woodland specialists showed no significant change. The earlier study, however, covered a longer period of time, which could explain the reduction of wetland dwellers as a result of variation in the supply of temporary water bodies. The decreased area of occupancy of grassland specialists, on the other hand, may reflect the reduction of native grasslands due to increased agricultural cultivation, particularly in the Rolling Pampa, where agricultural expansion has left few remnant grasslands and we did not detect three formerly common grassland specialists, Hymenops perspicillatus, Embernagra platensis, and Pseudoleistes virescens. These findings emphasize the need for conservation actions to support populations of grassland bird in the Pampas. © The Cooper Ornithological Society 2011. Fil:Codesido, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:González-Fischer, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bilenca, D. 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_v113_n2_p266_Codesido
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Agricultural intensification
Agroecosystem
Argentina
Grassland birds
Pampas
Aves
Embernagra platensis
Glycine max
Hymenops perspicillatus
Pseudoleistes virescens
spellingShingle Agricultural intensification
Agroecosystem
Argentina
Grassland birds
Pampas
Aves
Embernagra platensis
Glycine max
Hymenops perspicillatus
Pseudoleistes virescens
Codesido, M.
González-Fischer, C.
Bilenca, D.
Distributional changes of landbird species in agroecosystems of central Argentina
topic_facet Agricultural intensification
Agroecosystem
Argentina
Grassland birds
Pampas
Aves
Embernagra platensis
Glycine max
Hymenops perspicillatus
Pseudoleistes virescens
description We present the first quantitative comparative study between current (2006-2008) distributions of landbird and those recorded prior to the massive planting of transgenic soy beans in the Pampas of central Argentina (Narosky and Di Giacomo 1993). We surveyed landbirds along transects covering 23 counties of Buenos Aires province. To allow a comparison between our observations and those of Narosky and Di Giacomo, we used the number of counties in which each species was recorded as an estimate of current and past distributions. We found grassland and wetland specialists in significantly fewer counties than did Narosky and Di Giacomo (P < 0.05), while habitat generalists and woodland specialists showed no significant change. The earlier study, however, covered a longer period of time, which could explain the reduction of wetland dwellers as a result of variation in the supply of temporary water bodies. The decreased area of occupancy of grassland specialists, on the other hand, may reflect the reduction of native grasslands due to increased agricultural cultivation, particularly in the Rolling Pampa, where agricultural expansion has left few remnant grasslands and we did not detect three formerly common grassland specialists, Hymenops perspicillatus, Embernagra platensis, and Pseudoleistes virescens. These findings emphasize the need for conservation actions to support populations of grassland bird in the Pampas. © The Cooper Ornithological Society 2011.
format JOUR
author Codesido, M.
González-Fischer, C.
Bilenca, D.
author_facet Codesido, M.
González-Fischer, C.
Bilenca, D.
author_sort Codesido, M.
title Distributional changes of landbird species in agroecosystems of central Argentina
title_short Distributional changes of landbird species in agroecosystems of central Argentina
title_full Distributional changes of landbird species in agroecosystems of central Argentina
title_fullStr Distributional changes of landbird species in agroecosystems of central Argentina
title_full_unstemmed Distributional changes of landbird species in agroecosystems of central Argentina
title_sort distributional changes of landbird species in agroecosystems of central argentina
url http://hdl.handle.net/20.500.12110/paper_00105422_v113_n2_p266_Codesido
work_keys_str_mv AT codesidom distributionalchangesoflandbirdspeciesinagroecosystemsofcentralargentina
AT gonzalezfischerc distributionalchangesoflandbirdspeciesinagroecosystemsofcentralargentina
AT bilencad distributionalchangesoflandbirdspeciesinagroecosystemsofcentralargentina
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