Fig. 2From: A centenary tale: population genetic insights into the introduction history of the oriental fire-bellied toad (Bombina orientalis) in BeijingThe median-joining haplotype network of the combined mtDNA sequences. Each circle represents a unique haplotype. Circle size indicates the number of individuals (varying between 1 and 107) and colors reflect different sampling sites. The transverse dashes on the lines indicate substitutions between haplotypes. See Fig. 1 for sampling site informationBack to article page