Serras e pantanais arenosos: solos e geoambientes em unidade de conservação da Amazônia, Brasil

Conservation units represent the main strategy for the preservation and recovery of Brazilian natural resources. In order to guide their planning and management, information on geoenvironments is a key integrated reference. The aim of this study was to describe the pedological aspects associated with the identification, characterization and mapping of geoenvironments of the Serra da Mocidade National Park, Roraima, northern Brazil, in order to subsidize the ecological management of the unit. For the geoenvironmental stratification, pedological, geomorphological and vegetation were assessed and, 19 soil profiles were described and collected. The characterization of the vegetation was carried out in loco. Four pedoenvironments were described, with emphasis on the following soils: Podzols, Arenosols, Regosols, Fluvisols, Plinthosols, Acrisols, Gleysols e Cambisols. Twelve geoenvironmental units were identified. In the Park, there is a contrast between mountain ranges and gentle rolling hills of the forested zone and the extensive, ill-drained floodplains of the Rio Branco-Rio Negro pediplain. In addition, the conservation unit contains the only ancient granite-gneiss hilly plateau of North Amazonia, of large extension and complex topography. This study shows the uniqueness of each geoenvironment, subsidizing a more precise and adequate management practices of this Park.