Abstract

Seasonal pools in the northeastern United States provide habitat for amphibians and invertebrates, but little is known about their importance as habitat for birds. We examined avian community composition at seasonal pools in Rhode Island to test the hypothesis that seasonal pools would support a greater abundance and diversity of birds than nearby upland sites. From mid-May to June 2008, we conducted point counts at 33 paired sets of seasonal pools and upland sites that were 150 m apart. Bird abundance and diversity was significantly higher at seasonal pools than upland sites, whereas community composition as measured by evenness was similar. We also found that the mean abundance of birds was significantly greater at urban pools than rural pools. Our results suggest that birds preferentially use seasonal pools, particularly in more urban settings, adding to the body of evidence that supports the protection and restoration of small isolated wetlands in urban landscapes. RESUMEN Los charcos de agua estacionales en el noreste de los Estados Unidos proveen habitat para anfibios e invertebrados, pero poco se conoce sobre su importancia como habitat para las aves. Examinamos la composicion de la comunidad de aves en charcos estacionales en el estado de Rhode Island para probar el hipotesis que los charcos estacionales soportarian una mayor abundancia y diversidad de aves en comparacion a sitios cercanos de mayor elevacion. Desde mediados de Mayo hasta Junio del 2008, realizamos conteos por punto de 33 pares de charcos estacionales y sitios de mayor elevacion que estaban a 150 m de distancia uno del otro. La abundancia y diversidad de las aves fue significativamente mas alta en charcos estacionales que en sitios de mayor elevacion, mientras que la composicion de la comunidad medida mediante la uniformidad fue similar. Tambien encontramos que la abundancia promedio de las aves fue significativamente mayor en charcos urbanos que en charcos rurales. Nuestros resultados sugieren que las aves prefieren usar charcos estacionales, particularmente en sitios mas urbanos. Esto respalda la evidencia que ya existe que apoya a la proteccion y restauracion de humedales pequenos y aislados en paisajes urbanos.

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