Densidad de sitios para anidar y su uso por dos especies de pájaro carpintero (Melanerpes rubricapillus y M. chrysauchen) (Piciformes: Picidae) en un gradiente urbano de Costa Rica
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Authors
Sandoval Vargas, Luis Andrés
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Universidad de Costa Rica
Abstract
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Examiné la densidad de sustratos potencialmente utilizables para anidar por parte de dos especies de pájaros carpinteros (Melanerpes rubricapillus y M. chrysauchen), a lo largo de un gradiente urbano, así como la densidad de sus nidos, haciendo una búsqueda exhaustiva en tres sitios en Golfito, Costa Rica. El área urbana y semi-urbana tuvo la menor densidad de sustratos naturales. La densidad de nidos fue mayor en el área semi-urbana que en los otros dos sitios, posiblemente debido a una mayor abundancia de carpinteros. Los nidos se distribuyeron de forma agrupada, indicando a una mayor preferencia de los carpinteros por anidar en sustratos naturales. Una remoción de los sustratos artificiales podría causar una disminución de la población de ambas especies de carpinteros
I examined the density of nesting substrates potentially used by two woodpeckers (Melanerpes rubricapillus and M. chrysauchen) along an urban gradient, and their nest density in three sites with different human intervention in Golfito, Costa Rica. The urban and semi-urban sites had the lowest abundance of natural substrates for nesting, as expected by the effect of urban development. Nest abundance was greater in the semiurban site than in other sites, possibly in relation with a greater abundance of woodpeckers. Nests had a grouping distribution, which might reflect the preference of woodpeckers for nesting in natural substrates. The reduction of artificial and natural substrates in urban areas could decrease density population of these two woodpecker species.
I examined the density of nesting substrates potentially used by two woodpeckers (Melanerpes rubricapillus and M. chrysauchen) along an urban gradient, and their nest density in three sites with different human intervention in Golfito, Costa Rica. The urban and semi-urban sites had the lowest abundance of natural substrates for nesting, as expected by the effect of urban development. Nest abundance was greater in the semiurban site than in other sites, possibly in relation with a greater abundance of woodpeckers. Nests had a grouping distribution, which might reflect the preference of woodpeckers for nesting in natural substrates. The reduction of artificial and natural substrates in urban areas could decrease density population of these two woodpecker species.
Keywords
desarrollo urbano, nidos, melanerpes chrysauchen, melanerpes rubricapillus, Costa Rica, urban development, nest, red-crowned woodpecker, golden-naped woodpecker, melanerpes rubricapillus, m, chrysauchen, Costa Rica