Tree vegetation of a section of the secondary forest of the Pindo Mirador Biological Station
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Abstract
The secondary forest of the Biological Station Pindo Mirador, province of Pastaza, Ecuador, have been poorly studied, proposing with the research, to characterize the tree structure in a sector of the forest area of the Station. Above the sea level, four plots of 0.1 ha were established covering a sampling area of 0.4 ha; all trees with diameter a 1.30 from the soil ≥ 10 cm were measured, determining their absolute height. With the measurement records, four diametric classes and similar number of height ranges were established. Species and plot abundances, diametric classes and height ranges were analyzed to extract their descriptive statistics, and by non-parametric comparisons to establish differences between them. The contribution of species to the forest structure was assessed by determining structural diversity indexes, including the Importance Value Index and the basal area for each. The results show a richness of 49 species belonging to 36 genera of 27 families, where trees with diameters between 10 and 20 cm and heights between 8 and 20 m predominate. It is concluded that it is a moderately homogeneous forest with typical elements of the Andean-Amazon transition, of low species richness, whose vertical structure of the dominant flight is of the medium floor or subcanopy, medium dense, dominated by trees of Hyeronimaoblonga and Piptocoma discolor, which have the biggest influence on the structure.
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