Figure 4. Phenotypes of strains from different EGs.

(a) Swimming (top) and swarming (bottom) ability of strains in different ecogroups. Motility diameters in swimming and swarming plate were used to measure the motility ability. (b) Growth curve of strains in different ecogroups. The average optical density at 600 nm (OD₆₀₀) of five replicates were used to generate the curve, vertical lines indicate the standard deviation. (c) Biofilm formation (top) and colony morphology (bottom). OD₅₉₅ values were used to measure the biofilm formation ability. Colony morphologies of strains at different salinities were shown on the bottom. In panel a-c, five replicates were performed for each strain, and colors indicate different ecogroups.