Figure 6. Plot of significant dbMEM and AEM vectors identified in seascape genomic RDA analyses of Steromphala umbilicalis andNucella lapillus in the UK and Ireland. Symbols represent sampled sites for this study, and colours correspond to similarity in eigenvector values (black=high, grey=mid, white=low). The dbMEMs are associated with large-scale spatial structure in the data, given by their large eigenvalues (see also Figure S1). The dashed line in dbMEM_2 corresponds to the relative positioning of the Forbes line, demarcating the general northern limit of southern species within the UK and Ireland (Forbes 1858).