FIG 4.

Source-tracking analysis showing the mean putative contributions of the environmental microbiomes to the symbiotic microbiomes of each frog species in May and October. The blue, brown, and gray colors indicated water source, soil source, and unknown source microbiomes, respectively. Water source microbiome in the host symbiotic microbiome meant that the host likely acquired the microbiome from the aquatic environment. Soil source microbiome in the host symbiotic microbiome meant that the host likely acquired the microbiome from the land environment. Each row shows the analyses based on the samples from one kind of frog species. Bg, Bufo gargarizans samples; Fl, Fejervarya limnocharis samples; Mf, Microhyla fissipes samples; Pn, Pelophylax nigromaculatus samples.