A pulse chase technique was used to determine depth and breath of plant water uptake in an Amazonian evergreen forest. Two 2×2 m2 plots were irrigated with deuterated water. The deuterium pulse, measured as δD values of soil and plant sap water, was followed in the soil water profile and in stem water of small trees inside and up to 12 m away from the irrigated plots. The deuterium pulse percolation rate was measured to be approximately 0.25 m/month and similar to a previous study in central Amazon. There was little horizontal movement of label through the soil profile; allowing us to conclude that any evidence of label in plants away from the irrigation plots implies the presence of their roots inside the irrigation plots. The bulk of label uptake occurred in plants inside the irrigation plots. However, there were a few individuals as far as 10 m away picking up the label from the irrigation plots. This labeling pattern leads to the conclusion that small trees may have a core of water absorbing roots close to their main trunk, with some roots meandering far from their main trunk.
<!--:pt-->A caminho de um mecanismo justo de REDD: Reconhecendo os direitos e o papel de povos indígenas e comunidades locais na floresta amazônica Brasileira<!--:--><!--:en-->Leading to an equitable REDD mechanism: Recognizing the rights and role of indigenous peoples and local communities in the Brazilian Amazon Forest<!--:-->
A caminho de um mecanismo justo de REDD: Reconhecendo os direitos e o papel de povos indígenas e comunidades locais na floresta amazônica BrasileiraLeading to an equitable REDD mechanism: Recognizing the rights and role of indigenous peoples and local communities in the Brazilian Amazon Forest
Documento argumenta porque os povos indígenas devem ter o direito de participar efetivamente na formulação, desenvolvimento e determinação de qualquer projeto ou política de REDD baseada em suas terras e...