Using a simple isotope mixing model, we evaluated the relative proportion of water vapour generated by plant transpiration and by soil evaporation at two sites in the Amazon basin. Sampling was carried out at two different soil covers (forest and pasture), in a seasonal tropical rainforest at eastern Amazon where major deforestation is the result of land‐use change, and compared to a less seasonal central Amazon forest. In both forests, vapour from transpiration was responsible for most, if not all, of the water vapour generated in the forest, while it could not be detected above the grassy pastures. Thus the canopy transpiration may be a major source of water vapour to the forest and perhaps to the atmosphere during the dry season. The results are discussed in relation to predictive models based on net radiation that usually are not able to distinguish between transpiration and evaporation.
Building Bridges Between Commodity Roundtables and REDD+
Building Bridges Between Commodity Roundtables and REDD+
The success of REDD+ is limited by a lack of engagement of farmers. The success of the commodity roundtables is limited by the high costs of farm certification. This proposal is designed to overcome these limitations, linking a process that has funds but needs farmers (REDD+) with processes that have farmers but need funds (commodity roundtables) to achieve significant GHG emissions reductions.