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).