The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina

Birds play several roles in agricultural lands and respond to habitat heterogeneity within the agricultural landscape. Agricultural intensification in Argentina has increased the sown area, mainly with soybean, fragmenting landscapes in the pampas and mesopotamic region. In Entre Ríos Province, the...

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Detalles Bibliográficos
Autor principal:	Goijman, Andrea Paula
Publicado:	2008
Materias:	Agricultural landscape Birds Forest Soybean Terraces Aves Bos Glycine max Invertebrata
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman http://hdl.handle.net/20.500.12110/paper_00733407_v23_n2_p67_Goijman
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00733407_v23_n2_p67_Goijman
record_format	dspace
spelling	paper:paper_00733407_v23_n2_p67_Goijman2023-06-08T15:06:36Z The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina Goijman, Andrea Paula Agricultural landscape Birds Forest Soybean Terraces Aves Bos Glycine max Invertebrata Birds play several roles in agricultural lands and respond to habitat heterogeneity within the agricultural landscape. Agricultural intensification in Argentina has increased the sown area, mainly with soybean, fragmenting landscapes in the pampas and mesopotamic region. In Entre Ríos Province, the original Espinal forest has been fragmented, leaving remnant patches of natural vegetation, in cases modified by cattle grazing. These changes represent a potential threat for avian conservation. In Entre Ríos, terraces may be a useful habitat in maintaining avian diversity, similar to other non-cropped linear habitats in agricultural landscapes. We tested the hypothesis that habitat heterogeneity created by terraces would maintain higher species richness and densities of avian species that use original or modified forests within cropped areas compared to fields without terraces. The study was carried out in soybean fields with an adjacent forest and either herbaceous, shrub or no terraces in two periods (March-April 2004). Birds were surveyed using line transects in field interior and edge, and observations were carried out in one forest remnant adjoining each field. Most bird species recorded in soybean fields were insectivorous or consume invertebrates during the breeding season. Species richness, total bird density and the density of granivores, insectivores and omnivores were higher in fields with terraces than in fields without terraces. Moreover, shrub terraces had higher effect on species richness and bird density than herbaceous terraces. Our results suggest that terraces may serve as a possible tool for maintaining avian diversity in agroecosystems in Entre Ríos. Fil:Goijman, A.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman http://hdl.handle.net/20.500.12110/paper_00733407_v23_n2_p67_Goijman
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 landscape Birds Forest Soybean Terraces Aves Bos Glycine max Invertebrata
spellingShingle	Agricultural landscape Birds Forest Soybean Terraces Aves Bos Glycine max Invertebrata Goijman, Andrea Paula The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
topic_facet	Agricultural landscape Birds Forest Soybean Terraces Aves Bos Glycine max Invertebrata
description	Birds play several roles in agricultural lands and respond to habitat heterogeneity within the agricultural landscape. Agricultural intensification in Argentina has increased the sown area, mainly with soybean, fragmenting landscapes in the pampas and mesopotamic region. In Entre Ríos Province, the original Espinal forest has been fragmented, leaving remnant patches of natural vegetation, in cases modified by cattle grazing. These changes represent a potential threat for avian conservation. In Entre Ríos, terraces may be a useful habitat in maintaining avian diversity, similar to other non-cropped linear habitats in agricultural landscapes. We tested the hypothesis that habitat heterogeneity created by terraces would maintain higher species richness and densities of avian species that use original or modified forests within cropped areas compared to fields without terraces. The study was carried out in soybean fields with an adjacent forest and either herbaceous, shrub or no terraces in two periods (March-April 2004). Birds were surveyed using line transects in field interior and edge, and observations were carried out in one forest remnant adjoining each field. Most bird species recorded in soybean fields were insectivorous or consume invertebrates during the breeding season. Species richness, total bird density and the density of granivores, insectivores and omnivores were higher in fields with terraces than in fields without terraces. Moreover, shrub terraces had higher effect on species richness and bird density than herbaceous terraces. Our results suggest that terraces may serve as a possible tool for maintaining avian diversity in agroecosystems in Entre Ríos.
author	Goijman, Andrea Paula
author_facet	Goijman, Andrea Paula
author_sort	Goijman, Andrea Paula
title	The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
title_short	The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
title_full	The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
title_fullStr	The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
title_full_unstemmed	The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
title_sort	effects of habitat heterogeneity on avian density and richness in soybean fields in entre ríos, argentina
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman http://hdl.handle.net/20.500.12110/paper_00733407_v23_n2_p67_Goijman
work_keys_str_mv	AT goijmanandreapaula theeffectsofhabitatheterogeneityonaviandensityandrichnessinsoybeanfieldsinentreriosargentina AT goijmanandreapaula effectsofhabitatheterogeneityonaviandensityandrichnessinsoybeanfieldsinentreriosargentina
_version_	1768542828698271744

The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina

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