|
Apparent natural poisoning of Neotropical migratory birds at Laguna Verde , Colombia
ABSTRACT
Laguna Verde is a lake located at an elevation of 4300 m in the Los Nevados National Park in the Central Andes of Colombia . During a visit in April 2000, a total of 52 dead birds were found along the lake shore, of which 27 were neotropical migratory birds of two species, 3 represented two local species and 22 were bodies of unidentified passerines. During two subsequent visits no more dead birds were found, and water samples were taken for analysis. These analyses revealed very high concentrations of potentially toxic ammonium salts. The neotropical migrants were well above their previously recorded upper altitudinal limits in Colombia .
Key words : neotropical migratory birds, Central Andes, Colombia , natural poisoning
Lea toda la nota en PDF
Aparente envenenamiento natural de aves migratorias boreales en Laguna Verde, Colombia
RESUMEN
Laguna Verde es una laguna situada a una elevación de 4300 m en el Parque Nacional Natural Los Nevados en la Cordillera Central de Colombia. En una visita en abril de 2000, se encontraron 52 cadáveres de aves a lo largo de la orilla de la laguna, incluyendo 27 de dos especies de migratorias boreales, tres de dos especies locales y 22 de passeriformes no identificados. En dos visitas posteriores no se encontraron más cadáveres, y se tomaron muestras de agua para análisis. Los análisis revelaron concentraciones muy altas de sales de amoníaco potencialmente tóxicas. Los migratorios boreales estaban bien por encima de sus límites altitudinales previamente registrados para Colombia.
Palabras clave: aves migratorias boreales, Cordillera Central, Colombia, envenenamiento natural
Read all the note in PDF
|
