FIG 2.

Relative abundances of Microcystis mcy genotypes from the 2014 cyanoHAB by station and date. Relative abundances of genotypes were calculated by taking the ratio of the coverage of mcy genes to the coverage of the V4 16S rRNA gene. (A) Proportion of the Microcystis population that contained a complete, partial, or absent mcy operon by sample. Values above 1 indicate higher coverage of mcy genes than the 16S rRNA genes (see Materials and Methods). (B) Proportion of the Microcystis population that contains either the mcyB C1-like or B1-like variant. (C) Concentrations of particulate microcystins (MCs), nitrate (NO₃⁻), and phycocyanin (PC) per sample (micrograms per liter).