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Forest Fragmentation and Red-Cockaded Woodpecker Population: An Analysis at Intermediate Scale (Efecto de la Fragmentación de Bosque en una Población de Picoides borealis: un Análisis a Escala Intermedia

D. Craig Rudolph and Richard N. Conner
Journal of Field Ornithology
Vol. 65, No. 3 (Summer, 1994), pp. 365-375
Published by: Wiley on behalf of Association of Field Ornithologists
Stable URL: http://www.jstor.org/stable/4513952
Page Count: 11
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Forest Fragmentation and Red-Cockaded Woodpecker Population: An Analysis at Intermediate Scale (Efecto de la Fragmentación de Bosque en una Población de Picoides borealis: un Análisis a Escala Intermedia
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Abstract

The Red-cockaded Woodpecker population on the Sam Houston National Forest in Texas was surveyed during 1988. The 128 active clusters present make this population one of the largest in existence. Pine stand ages varied considerably across the forest. Correlation analysis indicated that stand area in excess of 60 yr of age is positively correlated with measures of woodpecker density. This relationship is present across a range of areas from individual compartments (= 520 ha) to blocks of 10-15 compartments. A positive correlation of area in pines of 60 yr of age and number of woodpeckers per group suggests that the causes of these relationships are still operating. It is hypothesized that the fragmentation of forest in excess of 60 yr of age by younger stands is impacting the demographics of this population. /// Durante el 1988, se estudió la población del carpintero Picoides borealis en el Bosque Nacional Sam Houston, Texas. Esta población, representada por 128 grupos activos, es una de las mayores en existencia. A todo lo largo del bosque hay rodales de pinos de diferentes edades. Se encontró una correlación positiva entre los rodales con edades superiores a los 60 años y altas densidades de carpinteros. Esta relación está presente a través de una variedad de áreas que van desde compartimientos individuales (= 520 ha) hasta bloques de 10-15 compartimientos. La correlación positiva entre áreas (rodales) de pinos de 60 años y el número de individuos de carpinteros por grupos, sugieren que las causas de esta relación se encuentran aún operando. Se presenta como hipótesis, que la fragmentación de bosques de 60 años con rodales más jóvenes, está impactando negativamente la demografía de esta población de aves.

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