Estudio preliminar de la composición florística y estructura de un bosque montano en la Reserva Comunal Chayu Nain, Amazonas, Perú

Montane forests exhibit a great floristic diversity and high levels of endemism, located at elevation ranging from 1500 to 3500 m asl. The objective of this research was to evaluate the tree diversity and the floristic composition of montane forest areas within the Natural Protected Area “Chayu Nain Communal Reserve”. For this purpose, four 50 × 20 m plots were established, each subdivided into four 25 × 10 m subplots. All trees and arborescent plants with a diameter at breast height (DBH) ≥ 10 cm were coded and evaluated. In the four plots, 206 arboreal and arborescent individuals were recorded, distributed in 58 species, 37 genera, and 26 families. The greatest abundance of individuals was presented by the species Alchornea grandiflora Müll. Arg. (28 individuals), Weinmannia pinnata L. (23 individuals) and Alzatea verticillata Ruiz & Pav. (12 individuals); the genera Weinmannia (31 individuals), Alchornea (28 individuals), Miconia (12 individuals), and Alzatea (12 individuals); and the families Cunoniaceae (31 individuals), Euphorbiaceae (28 individuals), Melastomataceae (26 individuals), Rubiaceae (21 individuals), and Lauraceae (16 individuals). The greatest species richness was recorded by the genera Miconia (4 species), Palicourea (4 species), and Weinmannia (4 species), and the families Rubiaceae (9 species), Lauraceae (8 species), Melastomataceae (6 species) and Cunoniaceae (4 species). The results indicate that high values of richness and abundance were recorded in these plots, with families, genera, and species characteristic of montane forests.