Over the past three decades, tropical forest clearing and burning have greatly altered the Amazonian landscape by increasing the cover of pastures and secondary forests. The alteration of biogeochemical processes on these lands is of particular interest on highly weathered Oxisols that cover large areas in the region because of concerns regarding possible nutrient limitation in agricultural land uses and during forest regrowth. The objectives of this study were to quantify (1) the reaccumulation of nutrients in biomass of secondary land uses, (2) changes in soil nutrient contents, (3) internal nutrient cycles, and (4) input–output budgets for the landscape mosaic.
A gestão ambiental e territorial de Terras Indígenas da Amazônia brasileira: uma questão climática
As Terras Indígenas protegem uma grande proporção da Amazônia brasileira, contribuindo para a redução do desmatamento e manutenção do equilíbrio climático da região. Este papel ecológico é consequência direta da gestão ambiental e territorial que os povos indígenas...