Number Of Speciesaccording To Minimum Diameter Measured In The Montane And Premontane Forests From Selva Central Of Peru

Data from eight Permanent Plots of 1 ha (including all plants >= 10 cm) and similar number of RAP Transects of 0.1 ha (including all plants >= 2.5 cm) established in primary tropical humid forests, premontane (940 - 1 150 masl) and montane (2 078 - 2 770 masl) in the Chanchamayo valley (Junin / Peru) are here used to finding to which extent the minimum recorded diameter influences tree diversity as found in forest inventories. In each diameter class, both the species percents and Fisher's Alpha values are considered. Our results show that forest inventories including only large diameters, e.g. >= 40 cm DBH, capture a low percent of the species (29.2% and 22.9% in premontane and montane forests, respectively); Fisher's Alpha values are coincident with these findings.