Fig. 2.

Frequency distributions of morphometrics and motion characterizing the three partitioned groups. (2a-b-c) Frequency distributions of the areas (2a), perimeters (2b) and mean speeds (2c) of the three grouped species based on data merged from the three replicates. As expected, the order from the smallest to the largest species in the suspension was V. microstoma, P. parasitica and then E. aerogenes. The y axis shows the relative frequency as a percentage (%); the x axis shows the area, perimeter, and mean speed measurements (µm², µm and µm/s) on a log10 scale. (2d) The frequency distribution of circularity values for V. microstoma cells (data merged from the three replicates). Values between 0.5 and 1 indicate the more circular V. microstoma sessile forms. The y-axis shows the relative frequency as a percentage (%); the x axis shows the circularity measure.