Publicação on-line; 40 ref.; 3 tables; 1 illus.; Summary (En)

ABSTRACT

The state of Pará ranks second in Brazilian mineral production, where bauxite accounts for 84% of
total mineral extraction, with negative impacts on the environment as a result. The determination
of objectives and targets using environmental indicators as a tool to evaluate forest restoration
processes is essential in the recovery of these exploited areas. This study aimed at evaluating the
efficiency of forest restoration techniques by means of 13 qualitative and quantitative indicators
for monitoring post-bauxite mining operations. Permanent plots were implanted in revegetated
areas with the use of two techniques: planting of seedlings and stewarding of natural regeneration.
It is concluded that the techniques are efficient for the recovery of forested area. However, natural
regeneration showed greater efficiency for restoration for Density, Erosion and Exotic Species
indicators. Still, natural regeneration should not be the sole option in the processes of ecosystem
restoration, since planting proved to be more efficient for some indicators.

Keywords: mining, forest succession, topsoil.