<p>The ordination is based on a Bray-Curtis similarity matrix of the square-root transformed abundance data obtained from the T-RFLP profiles from both CAS bioreactors: HC (•) and LC (▪). The open arrows point to the first sampling time and the black arrows point to the last sampling time for each bioreactor. Each scatter point in the plot represents the bacterial community in a particular bioreactor at a particular point in time. The separation between the points is relative to their similarity in terms of community composition and they are connected chronologically to show their relative changes throughout the sampling period. The stress value for the tridimensional NMDS ordination is shown. Two non-parametric analyses were calculated to test the significance of the differences observed in the NMDS ordination plot: One-way Analysis of Similarities (ANOSIM): <b><i>R</i></b><b> = 0.5451 </b><b>(</b><b><i>P</i></b><b><0.0001)</b>; One-way Non-Parametric Multivariate Analysis of Variances (NPMANOVA): <b><i>F</i></b><b> = 4.014 (</b><b><i>P</i></b><b><0.0001)</b>.</p
