The Amazon basin in transition

Changes in Amazonian ecosystems must be viewed in the context of the natural variation in climate5, 6 and soils7 across the region, as well as natural cycles of climatic variation and extreme events. A climatic gradient spans the Amazon basin, from the continuously rainy northwest to the wet/dry climate and long dry season of the southern and eastern regions, including the Cerrado (woodland/savannah) in the southeast. This climatic gradient is largely coincident with a gradient in land-use change, with more conversion to agriculture in the drier eastern and southern regions, indicating the interconnectedness of biophysical and socio-economic processes.
 
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Source and Photo: Nature, January 18th, 2012
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