Figure 1: Relative abundance of the most common bacterial genera for
each sample. Samples are arranged according to treatment.
While the relative abundance of ASVs did not differ between control,
solvent control, and brake dust, DEP treatment had 16 differentially
abundant ASVs compared to the control, according to DESeq2
(Figure 2 , Table A1 ). Eleven ASVs had a higher
abundance in the DEP treatment than control. Five ASVs had reduced
abundance in comparison to the control
treatment. A more conservative
approach to identify differential abundance is ALDEx2, which revealed
five ASVs with significantly altered abundance in the DEP treatment
compared to the control: Snodgrassella 1 + 2, Neisseriacae,Lactobacillus bombicola , and Bombiscardovia (Table
A2 ).