Fig. 9: Principal Component Analysis biplot.

a Microbial community. The results show the mean relative abundances of microbial communities classified at the genus level, for the top 25 genera, from 16S rRNA amplicon sequencing (b); for environmental marine sediment, Day 0, and Day 28 planktonic samples, and AR biofilms, after exposure anaerobic nutrient-enriched artificial seawater media dosed bi-weekly with glutaraldehyde for 28 days.