Diversity of bird feeding guilds in relation to habitat heterogeneity and land-use cover in a human-modified landscape in southern Mexico
Por: Pineda Díez de Bonilla, Esteban. Doctor [autor].
León Cortés, Jorge Leonel [autor] | Rangel Salazar, José Luis [autor].
Tipo de material: Artículo impreso(a) y electrónico Tipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): Aves | Población de aves | Alimentos para avesTema(s) en inglés: Birds | Bird populations | Birds-foodDescriptor(es) geográficos: San Fernando (Chiapas, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Journal of Tropical Ecology. Volumen 28, número 4 (July 2012), páginas 369-376. --ISSN: 0266-4674Número de sistema: 5120Resumen:Tipo de ítem | Biblioteca actual | Colección | Signatura | Info Vol | Estado | Fecha de vencimiento | Código de barras |
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Artículos | Biblioteca Electrónica Recursos en línea (RE) | ECOSUR | Recurso digital | ECO400051205681 | |||
Artículos |
Biblioteca San Cristóbal
Texto en la configuración de la biblioteca San Cristóbal |
ECOSUR | 001 | Disponible | 200823C5219-20 |
Disponible para usuarios de ECOSUR con su clave de acceso
Habitat heterogeneity is an important ecological determinant of species richness. We evaluated the diversity within bird feeding guilds as related to habitat heterogeneity and land-use cover in a human-modified tropical landscape. To quantify this process, fine-scale bird census and habitat heterogeneity data were collected for a bird community in a 22.5-km² fragmented landscape in southern Mexico. Land-use cover data derived from field surveys were used to calculate habitat heterogeneity index values and the extent of each land-use cover type in 239 grid cells of 300 × 300 m. Bird diversity values were obtained based on 1195 point-counts in these cells. Product-moment correlations and linear regression analyses were used to evaluate the relationship between bird-guild diversity values and habitat heterogeneity. A total of 109 resident bird species grouped in six feeding guilds were recorded: insectivores (42%), frugivores (21%), granivores (17%), nectarivores (9%), omnivores (8%) and carnivores (3%). Diversity values for the entire bird community were significantly positively related to habitat heterogeneity, but feeding guilds showed contrasting responses to habitat heterogeneity and the amount of land-use cover: insectivores and frugivores were more diverse and abundant in secondary forests than in any other land-cover. Our findings illustrate the importance of small landscape fragments as potential key refuges for the most diverse and specialized feeding guilds, such as granivores and insectivores. eng