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.
Amazônia em Chamas 9 – O novo e alarmante patamar do desmatamento na Amazônia
Amazônia em Chamas 9 – O novo e alarmante patamar do desmatamento na Amazônia
Desmatamento anual de 2019 a 2021 foi 56,6% maior que entre 2016 e 2018 na Amazônia; terras públicas concentraram 51% do desmatamento no último triênio, 83% dessas de domínio federal.