Fig. 4 in Geographical versus ecological isolation of closely related black flies (Diptera: Simuliidae) inferred from phylogeny, geography, and ecology

Fig. 4 PCA of stream variables for two species in Clade I-3 of subgenus Gomphostilbia in Thailand. Factor score 1 (PC-1) explained 38.36 % of the total variation and was related positively to stream width, depth, velocity, and conductivity. Factor score 2 (PC-2) explained 29.41 % of the total variation and was related positively to water conductivity and pH. The two taxa of this clade were not separated in environmental space