Figure 1 in Genetic data to describe the hybrid zone between Bufo bufo (Linnaeus, 1758) and Bufo verrucosissimus (Pallas, 1814) in northeastern Türkiye

Figure 1. Admixture proportions of each population as illustrated by pie charts on the map of the study area (a) according to STRUCTURE results (b), with information on mtDNA haplotypes observed in each population displayed over the STRUCTURE barplot. The inset map, modified from Özdemir et al. (2020), represents the geographic range of the Bufo bufo species group, with arrows pinpointing the western hybrid zone between Bufo spinosus (Iberian Common Toad, in red) and Bufo bufo (Common Toad, in blue) and potential contact areas between Bufo bufo and Bufo verrucosissimus (Caucasian Toad, in yellow) in Türkiye. The scatterplots of PCA (c) and DAPC (d) represent three groups (Bb: Bufo bufo; Bv: Bufo verrucosissimus; Hybrid: YAY population). Green dashed lines: Rize borders; Ruby red dashed lines: Artvin borders; Cyan line: Çoruh River along Artvin.