It is clear that the overall abundance of the top 10 most abundant genera was significantly decreased in specimens that were exposed to concentrations of atrazine higher than 10µg/L. The same decrease in abundance holds true when looking at the bacteria on the species level. Bacteroides abundance dropped to negligible levels in the 30µg/L of atrazine group’s specimens. Allobaculum, Oscillospira , Escherichia, Lactobacillus, and Akermansia genus’ all significantly dropped in a dose dependent like manner, whereas Staphylococcus species remained relatively stable amongst treatment groups.