Fig. 1 – (a–d) The location of site

Fig. 1 – (a–d) The location of sites where Nucella lapillus and Semibalanus balanoides populations were sampled around the
United Kingdom and Irish coast. The inset tables show the pair-wise FST values estimating the genetic differentiation
between the different sites. The upper diagonal matrix represents N. lapillus data, and the lower matrix shows the data for S.
balanoides. Shaded cells indicate significant genetic differentiation (P < 0.05).