Figure 5: Principal Components Analysis of genetic landscapes of 128 species and the average “multispecies” landscape. Projection of the genetic landscapes on the first two axes (A ) and on axes 2 and 3 (B ); same projection with the species names on the first two axes (C ) and on axes 2 and 3 (D ) of the PCA. Species are labelled as first letter of genera + three first letter of species as detailed in Supplementary Material 7. Letters (N, S, W, and E) refer to geographic directions from the centre of Maroni Basin. Signs (+ and -) correspond to higher or lower genetic divergences associated to these directions. Combinations of signs and letters describe types of ordinated patterns along axes (see individual projected landscapes, Supplementary Material 3).