Alteração estrutural de áreas de florestas exploradas convencionalmente em planos de manejo, nos domínios de floresta Atlântica, Minas Gerais, Brasil

The objective of the present study was to analyze the changes in the horizontal, diametric and internal structures in conventionally exploited areas of forest management plans. Indicators and verifiers were used having as control the legal reserve area. After the forest harvest period of each FMP and comparing the forest management areas with the legal reserve areas with respect to changes in the horizontal structure of the FMPs, the verifier absolute density indicated that the forest management areas were statistically equal (p>0.05) to legal reserve areas in the FMP28, FMP29 and FMP30 and different (P=0.05) in the FMP16. The verifiers outside absolute dominance and total volume outside bark indicated that the stocks of basal area and total volume of the forest management areas were statistically equal (P>0.05) to legal reserve areas in the FMP28, FMP30 and FMP16, and different (P=0.05) in the FMP29. In relation to changes in the diametric structure of PMFs, the verifiers distribution of absolute density, basal area and outside bark volume, per hectare and per diametric class, indicated that the forest management areas were statistically equal (P>0.05) to legal reserve areas in the FMP28, FMP29 and FMP30, and different (P=0.05) in the FMP16. In relation to changes in the internal structure of the FMPs, the verifier infestation by lianes indicated that the forest management areas showed infestation by lianes statistically equal (P>0.05) to legal reserve areas in the FMP29, FMP30 and FMP16, and different (P=0.05) in the FMP28. The verifier log quality showed that the managed forest areas had log quality statistically equal (P>0.05) to the legal reserve areas in all the FMPs.