degradation; diversity; ecological dominance; forest dynamics.

To restore an area, especially in areas that have been mined, it is necessary to have knowledge about the behavior of species and their interactions. Therefore, defining which species to use is one of the essential steps

for successful restoration. The objective of this work was to evaluate the growth dynamics of planted tree species and those from natural regeneration, in the successional trajectory of forest restoration in surface mining areas (post-bauxite mining) in a sustainable use conservation unit in the amazon. This work was developed at the Mineração Rio do Norte enterprise that extracts bauxite in the Saracá-Taquera National Forest, located in the district of Porto Trombetas, municipality of Oriximiná, state of Pará. To facilitate understanding, this thesis was divided into three chapters. The first evaluates the adaptation and growth of planted species over 17 years, and proposes planting strategies for forest restoration in mined areas. Through a joint analysis of the degree of survival of the species in relation to their ecological groups, and the average annual increments in basal diameter, possible strategies for using the species in future restoration trials were indicated. Of the 92 species used in planting, more than half showed high mortality and low diameter increment, and are not recommended for planting in mined areas. However, 21 species showed satisfactory survival and high increases, showing promise for use in restoration projects. The second analyzes the dynamics of the floristic composition of natural regeneration in 12 restoration areas that differ in age (14 to 28 years). During the eight years of evaluation, natural regeneration played an important role in the forest restoration process in these degraded areas. A tendency towards increased richness was demonstrated, especially in older plantations, from the 1980s. Abundance, despite being high in both younger and older plantations, was concentrated in a few species, which showed a high number of unique species. There was also a replacement of early species by late ones in the succession process as the planting progresses in age. Furthermore, zoochory was the predominant dispersal syndrome in all areas, which shows the importance of fauna in the restoration process. The third estimates diametric growth rates of forest species originating from reforestation and natural regeneration, from areas in the process of restoration, and from primary forest, in Flona Saracá-Taquera. The performance of the species was evaluated for a period of 13, 8 and 12 years, respectively. 32 species from reforestation, 32 from natural regeneration and 40 from primary forest were evaluated. From a model, with diameter as the dependent variable, through regression and analysis of variance, it was possible to generate equations that allow estimating the diameter growth of the species with good accuracy. Conclusively, with the study it was possible to select species that proved suitable for use in highly impacted areas, as well as create a mathematical model to estimate the future growth of these planted, regenerating and native forest species.