Resultados preliminares do diagnóstico da diversidade em florestas nativas, com auxílio de fotos aéreas.

Abstract

The management systems that natural species require frequently have not been taken into consideration in planning for biodiversity conservation. The biodiversity as measured by species and individuals number was assessed in two forest reserve zones located within reforestations of Eucalyptus sp and Pinus sp in São Paulo, Brazil. A grid-like set of plots was set up for the data collection over each of the two study areas. The natural species were aggregated onto two groups using height classes, i.e. herbaceous (< 0.5 m) and shrubs plus trees (> 1.3m) layers. Within each natural area the number of species and individuals of the height class > 1.3 m was surveyed on 50 square plots of 10 x 10 m, whereas those of the height class < 0.5 m was surveyed on 250 subplots of 1 m x 1m. The data analysis involved using both statistical and geostatistical methods for analysing diversity once species and individual number were assessed. For the analysis of the communities of plants structure parameters were made calculations, frequency, density and dominanc and index of value of importance (IVI) and as biodiversity indexes the certain indexes for Shanon, Simpson and Evennes, made calculations by the Software Fitopac 1.5/UNICAMP.