Fig. 3. (a) A Shepard plot showing item points (stress) around the regression between distances between each pair of communities against their original dissimilarities and (b) non-metric multidimensional scaling (NMDS) graphs based on Bray–Curtis similarities of the percentage sequence abundance on stone (ST) and tire derived rubber (TDR) media, at 10, 20 and 30 °C showing differences in the bacterial community structure in biofilms developed from real wastewater.