Figure 4

Relationship of most associative elements with ARGs. (a) Ca vs. ampr. (b) Sr vs. ampr. (c) Ca vs. tetO. (d) Cr vs. vs. tetO. (e) Mn vs. tetO. (f) Na vs. tetO. (g) P vs. tetO. (h) pH vs. tetO. (i) Si vs. tetO. (j) Sr vs. tetO. The black line is fitted through the sigmoid model. Unit: ampr (copies/mL), tetO (copies/mL), Ca, Si, Na (mg/L), Cr, Mn, P, Sr (μg/L).