Fig. 2.

(a) Microcystis sp. cell counts over time in the control and treatment groups presented in box plots with median and 25–75 percentiles. The lines represent all the data range except extreme values, which are depicted with dots. P-value associated with the Wilcoxon rank-sum test indicated at the top of the panel. (b) Box plots of Scenedesmus sp. cell counts over time in the control and treatment groups with P-value associated with the Wilcoxon rank- sum test indicated at the top of the panel.