Map of Amazonia showing the location of all Amazon Tree Diversity Network (ATDN) plots. Legend: Red, terra-firme Pebas formation; Brown, terra-firme Brazilian Shield; Orange, terra-firme Guiana Shield; Yellow, forests on white sand; Dark blue, igapó; Light blue, várzea; Purple, swamp forest; Green, plots without species composition data (this can be genus level data or just N and S).