Fig. 5 in Geographical versus ecological isolation of closely related black flies (Diptera: Simuliidae) inferred from phylogeny, geography, and ecology

Fig. 5 PCA of stream variables for three species in Clade II of subgenus Gomphostilbia in Thailand. Factor score 1 (PC-1) explained 39.01 % of the total variation and was related positively to stream width and related negatively to velocity and altitude. Factor score 2 (PC-2) explained 19.64 % of the total variation and was related positively to stream depth. Simulium chumpornense was distributed separately from other taxa of the clade along the PC-1 axis