FIG. 1.

CA based on T-RFLP data (16S rRNA genes) obtained from control (white triangles) and polluted (black circles) microcosms. The data analyzed correspond to averages for duplicate samples of HaeIII-digested 16S rRNA genes yielding 5′-end T-RFLP patterns. Each number corresponds to the day of sampling relative to the start of the experiment. Encircled symbols correspond to bacterial communities from control samples and from contaminated samples incubated up to 30 days or more than 364 days (the control cluster). Percentage values represent Bray-Curtis similarity among these samples.