For the second sequencing event, 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.