Fig. 1From: Taxonomic and phylogenetic composition show biotic resistance to exotic invasion in acid seep springsMaximum likelihood phylogeny of species observed within 10 acid seep springs. The scale bar represents the substitution rate of nucleotides (at an individual locus) within concatenated rbcL and matK plastid regions over the specified distance. Species codes are available in Table S1. Monilophytes are positioned as the rootBack to article page