Comparison of FST-based genetic differentiation between Prosopis juliflora populations in A the Afar Region, Ethiopia and B Baringo County, Kenya. Boxplots and data points show the distribution of pairwise FST between pairs of populations from invaded sites (Inv-Inv), invaded and sites neighbouring plantations (Inv-Neigh), invaded and plantation sites (Inv-Plant), plantations and sites neighbouring plantations (Neigh-Plant), and plantations sites (Plant-Plant) (see text for further details). The inserted boxplot depicts the median value, and interquartile ranges. Different letters indicate significant differences (Kruskal-Wallis rank sum test; P < 0.05; Bonferroni-Dunn post hoc test).