Regeneração natural da vegetação arbórea e relações ambientais em dois fragmentos de cerrado sensu stricto

Abstract

Studies on natural regeneration in sites with anthropic influences demonstrate the natural recovery capacity of the environments, as well identify the species most susceptible to success in the natural regeneration of a particular site. The present study evaluated two fragments of vegetation of cerrado sensu stricto submitted to disturbances of the cattle breeding activity. The objectives were to know the diversity and floristic patterns of natural regeneration and to identify possible environmental relationships between woody vegetation and environmental and biophysical variables. Ten plots of 100 m² (denominated Class I) were installed in each fragment, representing a total of 20 plots, where all woody plant species with db < 5 cm (diameter at 30 cm from the soil) and H > 1 m (height) were identified and quantified. Within the Class I plots were delimited sub-plots of 4 m² (denominated Class II) where the woody individuals with 15 cm ≤ H ≤ 1 m were sampled. Chemical and physical analysis were analyzed by means of soil samples, and the variables of soil cover, canopy cover, canopy height, rockiness, soil humidity, soil electrical conductivity and soil temperature, slope and altitude were measured. The dissertation was structured in two chapters, in whish the first one presents information about the woody natural regeneration and the second one deals with the soil characteristics and the environmental variables in order to identify the environmental relations between the evaluated parameters and the regenerating woody vegetation in the two areas of study.