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(A and B) Results of image analyses of confocal laser micrographs illustrating the effects of the chlorhexidine and nutrient treatments on the relative abundances of algae, cyanobacteria, and bacteria in the river biofilms, by treatment. The parameters indicated by different letters are significantly different (P < 0.05). (B) Proportional illustration of the impacts of treatments on the relative abundances of algae, cyanobacteria, and bacteria in the river biofilms.
