Fig. 1: Bacterial community composition differed for different locations, and POU devices could capture differences in community structure, with carbon filters and RO membranes demonstrating similar results but with important differences.
From: Point-of-use filtration units as drinking water distribution system sentinels
a Bubble plot presenting the relative taxonomic abundance of the most abundant bacterial taxa across samples collected from four different locations. The size (area) of the circle is scaled to the relative abundance of that taxon. For each sample type, we used an average of the abundances detected across all samples/replicates from that sample point and the top 30 genera are shown. Carbon filters and RO membranes were sampled after running for 180 days, while the MFS samples were sampled 5 times during the 180-day sampling process. b Bray-Curtis distance analysis of microbial communities across samples visualized using a two-coordinate principal coordinate analysis (PCoA) indicates that RO samples from different locations are distinct from each other but are more similar to the carbon cartridge biofilm samples from the same location. Each symbol represents one sample. The samples are color-coded for type. The symbol shapes indicate the location of samples collected. The numbers on the axes indicate the percent of variation explained by each coordinate. The symbol shapes with days labeled are samples of MFSs from Austin collected at different time. The ellipses are hand drawn and demarcate samples from the same site.
