Patterns of bird abundance along the agricultural gradient of the Pampean region

Bird and land-use surveys were conducted along the agricultural gradient covering from pure croplands through mixed-farming to pure pastoral-farming scenario in the Pampean region of Argentina. Simple regression analyses were performed to analyse the responses of bird abundance to the percentage of...

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Autores principales: Filloy, Julieta, Bellocq, Maria Isabel
Publicado: 2007
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Bos
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01678809_v120_n2-4_p291_Filloy
http://hdl.handle.net/20.500.12110/paper_01678809_v120_n2-4_p291_Filloy
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spelling paper:paper_01678809_v120_n2-4_p291_Filloy2023-06-08T15:17:03Z Patterns of bird abundance along the agricultural gradient of the Pampean region Filloy, Julieta Bellocq, Maria Isabel Cropland Farming landscapes Grassland birds Land uses Pastoral land abundance bird community structure crop production grassland land use mixed farming population decline Argentina Sierras Pampeanas South America Aves Bos Bird and land-use surveys were conducted along the agricultural gradient covering from pure croplands through mixed-farming to pure pastoral-farming scenario in the Pampean region of Argentina. Simple regression analyses were performed to analyse the responses of bird abundance to the percentage of land devoted to crop-production. The specific variables associated to bird abundance within both the crop and pastoral-farming landscapes were identified by running redundancy analyses (RDA). The abundance of 20 out of 43 species (47%) was significantly related to the percentage of cropland, finding negative (65%), positive (25%) unimodal (5%) and bimodal (5%) responses of birds to increasing intensity of crop production. The results showed three types of negative and two types of positive responses of bird abundance to the agricultural gradient. RDA revealed the importance of crop-field types in the crop-production scenario and of cattle presence and grass height in the pastoral-farming scenario for the structuring of the grassland bird community. As most species were negatively affected by crop production, the current land-use homogenisation towards high-intensity croplands will most likely result in population decline of many birds in the region. © 2006 Elsevier B.V. All rights reserved. Fil:Filloy, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bellocq, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01678809_v120_n2-4_p291_Filloy http://hdl.handle.net/20.500.12110/paper_01678809_v120_n2-4_p291_Filloy
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cropland
Farming landscapes
Grassland birds
Land uses
Pastoral land
abundance
bird
community structure
crop production
grassland
land use
mixed farming
population decline
Argentina
Sierras Pampeanas
South America
Aves
Bos
spellingShingle Cropland
Farming landscapes
Grassland birds
Land uses
Pastoral land
abundance
bird
community structure
crop production
grassland
land use
mixed farming
population decline
Argentina
Sierras Pampeanas
South America
Aves
Bos
Filloy, Julieta
Bellocq, Maria Isabel
Patterns of bird abundance along the agricultural gradient of the Pampean region
topic_facet Cropland
Farming landscapes
Grassland birds
Land uses
Pastoral land
abundance
bird
community structure
crop production
grassland
land use
mixed farming
population decline
Argentina
Sierras Pampeanas
South America
Aves
Bos
description Bird and land-use surveys were conducted along the agricultural gradient covering from pure croplands through mixed-farming to pure pastoral-farming scenario in the Pampean region of Argentina. Simple regression analyses were performed to analyse the responses of bird abundance to the percentage of land devoted to crop-production. The specific variables associated to bird abundance within both the crop and pastoral-farming landscapes were identified by running redundancy analyses (RDA). The abundance of 20 out of 43 species (47%) was significantly related to the percentage of cropland, finding negative (65%), positive (25%) unimodal (5%) and bimodal (5%) responses of birds to increasing intensity of crop production. The results showed three types of negative and two types of positive responses of bird abundance to the agricultural gradient. RDA revealed the importance of crop-field types in the crop-production scenario and of cattle presence and grass height in the pastoral-farming scenario for the structuring of the grassland bird community. As most species were negatively affected by crop production, the current land-use homogenisation towards high-intensity croplands will most likely result in population decline of many birds in the region. © 2006 Elsevier B.V. All rights reserved.
author Filloy, Julieta
Bellocq, Maria Isabel
author_facet Filloy, Julieta
Bellocq, Maria Isabel
author_sort Filloy, Julieta
title Patterns of bird abundance along the agricultural gradient of the Pampean region
title_short Patterns of bird abundance along the agricultural gradient of the Pampean region
title_full Patterns of bird abundance along the agricultural gradient of the Pampean region
title_fullStr Patterns of bird abundance along the agricultural gradient of the Pampean region
title_full_unstemmed Patterns of bird abundance along the agricultural gradient of the Pampean region
title_sort patterns of bird abundance along the agricultural gradient of the pampean region
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01678809_v120_n2-4_p291_Filloy
http://hdl.handle.net/20.500.12110/paper_01678809_v120_n2-4_p291_Filloy
work_keys_str_mv AT filloyjulieta patternsofbirdabundancealongtheagriculturalgradientofthepampeanregion
AT bellocqmariaisabel patternsofbirdabundancealongtheagriculturalgradientofthepampeanregion
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