LA FLORA EN CUATRO TIPOS DE BOSQUE, AÑANGU, PARQUE NACIONAL YASUNÍ, ECUADOR

Abstract

During April of the year 2004 and 2006, the fieldwork was realized in Añangu. The study ineludes the forests: alluvial, colluvial, moretal, and hill, located in the zone of life humid tropical forest. The methodology was applied of transeets, every set of thousand meters, and the species taken in account 2.5 DAP’s cm. There were realized botanical collections, the same ones that are deposited in the herbarium Alfredo Paredes. The analysis of the ¡nformation, it was realized on the basis of the indexes of Simpson’s diversity and Sorensen’s similañty. In four types of forest, the number of individuáis changes between 159 and 169, the number of species between 48 and 91, and in whole they add 253. The index of Diversity shows valúes that explain the diversity among low and a half whereas the similañty is between 1.4 % and 24.4 %. The first four most frequent species, they are; Rinorea apiculata, Aegiphila cuneata, Trichilia laxipaniculata, Iríartea deltoidea (ailuvial), I. deltoidea, Bauhinia brachycalyx, R. apiculata, Acalypha cuneata (colluvial), Mauritia flexuosa, Mauritiella armata, Attalea butyracea, Zygia inaequalis (moretal) and alone Capparídastrum sola, Matisia malacocalyx, Perebea guianensis, Otoba glycycarpa (hill). Cinchonia Vol. 8, # 1, 2007 55 The Índex of diversity shows similar interpretation, on the other hand the number of individuáis, species and the presence of the most frequent species are different. The Amazonian forests, in few kilometres of distance show w¡- de differences , which suggests that to preserve the biodiversity, it is necessary protect sufficient extensions of forest.