Catorce nuevos registros altitudinales de aves del bosque húmedo montano, Parque Nacional Madidi, Bolivia
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Ecología en Bolivia
Abstract
San Miguel Chico está en un valle de bosque húmedo montano (1.750 a 1.600 m) en el Parque Nacional Madidi, cerca al pueblo de Pata en el área de Apolo. Durante un estudio de 3 días (10 a 13 de septiembre de 2000) en una senda local, identifiqué 68 especies de aves y encontré l 4 nuevos registros altitudinales. La comunidad de aves en este hábitat montañoso tenía una inusual alta diversidad de especies de tierras bajas. Identifiqué cuatro especies indicadoras de Yungas inferiores de Bolivia y Perú con rangos restringidos: Simoxenops striatus, Thamnophilus aroyae, Chiroxiphia boliviana y Hemitriccus spodiops. Simoxonops striatus es la única especie no común y posiblemente merezca protección. Registré Hemitriccus rufigularis que se encuentra categorizada en bajo riesgo para su pequeña y declinada población. Con un solo y corto estudio, es difícil saber si los registros son indicadores del rango de una población de aves en Bolivia o de un extraño sitio en una situación geográficamente única. Sería importante analizar los resultados con estudios en el futuro de aves en P. N. Madidi y área cercana.
San Miguel Chico is located in a humid montane forest valley (1600 a 1750 m) in Madidi National Park, close to the town of Pata in the Apolo area. During a three-day study (September 10 to 13, 2000) on a single local trail, I identified 68 species of birds and recorded 14 new altitude records. The bird community in this montane habitat had an unusually high diversity of lowland tropical species. I identified four restricted-range indicator species for the Bolivian and Peruvian Lower Yungas Endemic Bird Area (EBA): Simoxenops striatus, Thamnophilus aroyae, Chiroxiphia boliviana y Hemitriccus spodinps. Simexonops striatus is the only species not common and possibly deserves protection attention. I recorded Hemitriccus rufigularis, which is considered threatened-Lower Risk, for its small and declining population. With one short study, it is difficult to know if these records are indicating a population range in Bolivia or a particular site in a unique geological situation. It will be important to analysis this data with future bird studies in Madidi N. P and adjacent areas.
San Miguel Chico is located in a humid montane forest valley (1600 a 1750 m) in Madidi National Park, close to the town of Pata in the Apolo area. During a three-day study (September 10 to 13, 2000) on a single local trail, I identified 68 species of birds and recorded 14 new altitude records. The bird community in this montane habitat had an unusually high diversity of lowland tropical species. I identified four restricted-range indicator species for the Bolivian and Peruvian Lower Yungas Endemic Bird Area (EBA): Simoxenops striatus, Thamnophilus aroyae, Chiroxiphia boliviana y Hemitriccus spodinps. Simexonops striatus is the only species not common and possibly deserves protection attention. I recorded Hemitriccus rufigularis, which is considered threatened-Lower Risk, for its small and declining population. With one short study, it is difficult to know if these records are indicating a population range in Bolivia or a particular site in a unique geological situation. It will be important to analysis this data with future bird studies in Madidi N. P and adjacent areas.
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Vol. 38, No. 2