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- W170869895 abstract "-During 3 winter seasons (1991-1994), we studied the distribution and abundance of birds in 3 habitat types of the Georgia Piedmont. Bird densities were calculated using data from 2160 variable circular-plot counts, 720 each in the interiors of the 3 habitats. Habitat variables were measured in 135 0.04-ha circles, 45 in each of the 3 habitats. The objective was to compare bird densities during winter in the Piedmont's fragmented mature pine forests and mature upland hardwood forests with those in planted pine plantations, a major replacement type. A total of 49 species was detected: 44 in mature pines, 42 in mature upland hardwoods, and 32 in 20-30-yr old pine plantations. Twenty-nine species occurred across all habitats. Overall, density estimates were low and variability among counts was high; consequently, significant (P < 0.05) habitat preferences were found for only about 25% of the species. Species richness (S) and diversity (H') were greatest (P < 0.05) in mature pines and lowest (P < 0.05) in planted pine plantations. Also, species evenness (E) was higher (P < 0.05) in mature pines and upland hardwoods than in planted pine plantations. ASOCLACIONES DE PAJAROS EN HABITATS AL PIE DE LAS MONTANAS DE GEORGIA DURANTE EL INVIERNO Sinopsis.-Durante tres inviernos (1991-1994) se estudi6 la distribuci6n y abundancia de aves en tres tipos de habitats en Georgia. La densidad de pa.jaros se calcul6 utilizando datos obtenidos de 720 censos circulares en el interior de cada uno de los diferentes tipos de habitat. Las variables en los habitats fueron medidas estableciendo 45 circulos de 0.04 ha en cada uno de los habitats. El objetivo fue comparar la densidad de aves durante el invierno en bosques de pino maduro fragmentado, bosques de maderas duras de altura, con plantaciones de pino, las cuales son el principal tipo de vegetaci6n de reemplazo en la localidad. Se encontraron 49 especies de pdjaros. A saber: 44 en bosques de pinos maduros, 42 en bosques de maderas duras y 32 en plantaciones de pino de 20-30 anos de edad. En los tres tipos de habitats se encontr6 en comin 25 especies de pdjaros. A grandes rasgos los estimados de densidad resultaron bajos y la variabilidad de los censos alta. Como consecuencia solo hubo diferencia significativa para preferencia de habitat (P < 0.05) en el 25% de las especies. La riqueza de especies (S) y diversidad (H') fue mayor (P < 0.05) en los pinos maduros y menor (P < 0.05) en las plantaciones. Ademas la uniformidad de especies (E) fue mayor (P < 0.05) en habitats de pinos maduros y maderas duras que en las plantaciones." @default.
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- W170869895 date "1996-01-01" @default.
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- W170869895 title "Habitat associations of birds in the Georgia piedmont during winter" @default.
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