Análise estrutural de populações vegetais em fragmento savânico após supressão de queimadas

Abstract

Certainly the Cerrado is the richest savanna in the world, and the second largest biome in the Brazil, losing in territory only for the Amazon. The occurrence of natural forest fires in the Cerrado has made the typically savannic species to adapt to the fire factor, acquiring greater resilience to it. Our objective was to analyze age structures of plant populations of two distinct ecological groups (savannic and forest species), after little more than four decades of fire suppression in a savannic fragment. The data analysis was made through six plant species, which were divided into two ecological groups. The first one was characterized by the inclusion of species adapted to fire (savannic species) and the second with those sensitive to fire (foresty and generalist species). The hypothesis tested and corroborated by the results, without the occurrence of fires for many decades in the savannic fragment studied, in the municipalit of Corumbataí (SP), there would be greater dominance of fire sensitive species over those adapted, after little more than four decades without the occurrence of fires.