Multivariate analyses on the structure of assemblages in different sites in all sampling times.

n = 4 The whole analyses is shown as well as the a priori contrast (i.e. the analyses where the distances to be compared were chosen a priori).
ns = not significant;
* = p<0.05;
** = p<0.01.
600 m and 1400 m = sites 600 and 1400 m away from the effluent, respectively. Factor 1: Distance (Di), fixed, with 2 levels; Factor 2: Sites (Si), random, nested in Distance with 4 levels; Factor 3: Time (Ti), random, with 2 levels. Data were squared-root transformed.