Fig. 2.

Changes in the bacterial abundance of the five strains during and after exposure to PAR, PAR + UVR, or kept in the dark. The different times after exposure depended on achieving a significant change in oxygen consumption. Cell numbers are expressed as the mean of three replicates ±1 SD. In most measurements, error bars are smaller than the symbols. Solid symbols represent the dark control, gray symbols the PAR treatment, and open symbols the PAR + UVR treatment. The vertical dashed line represents the end of the exposure to the different treatments