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30 de junho de 2015

jun 30, 2015

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Vertical patterns of soil water uptake by plants in a primary forest and an abandoned pasture in the eastern Amazon: an isotopic approach

This study evaluated the water uptake patterns of a primary forest and of the savanna-like vegetation of an abandoned pasture in an eastern Amazon site. We used natural stable isotope abundance in the soil profile, as well as plots irrigated with deuterated water...

Terras indígenas na Amazônia brasileira: reservas de carbono e barreiras ao desmatamento

As Terras Indígenas (TIs) na Amazônia brasileira cobrem uma fração significativa da região (27% da área com florestas1) e abrigam 173 etnias (1). Além de serem fundamentais para a reproduçãofísica e sociocultural dos povos indígenas – é na Amazônia que se encontram...

Forest fires in the Amazon: short-term individual benefits versus long-term societal costs

Fire is the least expensive and most broadly used method of clearing land and converting forest biomass into soil nutrients for pastures and crops in the tropics. Fire is also used to control weeds and to reinvigorate palatable pasture grasses. Even if beneficial for farmers over the short run, intensification of deforestation and burning impose long-term costs on individuals and society.