We have a new paper led by Ana Malhado, on the ecological biogeography of Amazonia. It can be downloaded from here. It provides a nice concise overview of recent insights into the distribution and variation in function of Amazonian trees, and the complex interviewing of deep history, past environmental variation and current climate and soils.
This is based off the literature review Ana did for her DPhil a few years ago, but updated with more recent insights.
Yadvinder Malhi is an ecosytem ecologist and Professor of Ecosystem Science at Oxford University