Abundance of gene targets relative to 16S rRNA genes in samples collected at UWWTP and river sampling locations

The presence is categorised in three main groups of gene abundance, with high (orange), intermediate (yellow) and low abundance (blue). Boxes indicate where 50% of the data fall, with the horizontal line inside marking the median value. The lines stretch out to show the range of typical values. Outliers have been removed from this plot for clarity.