ABSTRACT
Crypturellus duidae (Tinamidae) is a poor-soil specialist with isolated populations in Amazonia, and is considered restricted to white-sand forest habitats. We report the first record of C. duidae in a peatland forest in northern Peru, in the Putumayo River basin. Our record extends the known distribution of C. duidae between two disjoint areas of occurrence in Peru and Colombia, and shows its presence in peatland forest, another forest type on nutrient-poor soils. Additionally, we report the presence of other poor-soil specialist bird species that were previously registered in peatlands. Together with the new record of C. duidae, these bird records provide evidence of the diversity of poor-soil specialists in peatland forests. (AU)
Subject(s)
Forests , Amazonian Ecosystem , Soil Conditions , WetlandsABSTRACT
En este trabajo es estudiado el efecto de dos densidades de siembra de la palmera aguaje (Mauritia flexuosa L.f.) sobre su crecimiento en altura; cuantificamos la proporción de plantas según sexo y determinamos los requerimientos ecológicos de iluminación y forma de copa del aguaje. El estudio se desarrolló en dos subparcelas con diferente densidad de siembra que fueron monitoreadas por 6 años después de 6 años de haber sido plantadas. Los resultados muestran que los individuos presentan mayor altura promedio y por lo tanto mayor crecimiento a mayor densidad de siembra. Es así que a los 12 años de establecidas las plantaciones, los individuos tuvieron en promedio 15.28 m y 13.1 m de altura a densidades de siembra mayores y menores, respectivamente. La proporción de palmeras fértiles se fue incrementando con el tiempo, siendo por lo general mayor a bajas densidades e incrementando en el tiempo la presencia de plantas femeninas. Existe una marcada competencia entre las copas de las palmeras por requerimientos de luz en las categorías buena y aceptable, por lo que se recomienda continuar con la evaluación y analizar el comportamiento futuro de las palmeras.
In this work, the effect of two planting distances of Mauritia flexuosa on its height is studied, quantified the sex ratio and ecological requirements needed by the species, e.g. light and crown shape. We conducted this study in two plots, each one with a different planting distance, which were monitored throughout 6 years starting after 6 years of the establishment of the plantations. Increased planting distance in between individuals gave increased average height and thus increased growth. Individuals planted with higher vs lower distances grew in average 15.28 m and 13.1 m in height respectively. The proportion of fertile palms increased throughout time and was lower in plantations with higher palm densities. The presence of female individuals increased also with time. There was a strong competition among palm crowns related to light requirements in good and acceptable categories. We recommended to continue with the evaluation and future analysis of this species' behavior.