Growth curves of <i>Aulacoseira granulata, Cylindrospermopsis raciborskii</i> and <i>Microcystis aeruginosa</i>.

<p>Lines represent absorbance and symbols represent chlorophyll a concentration. Dashed lines and open symbols are axenic* cultures (−), and solid lines and symbols are non-axenic cultures (+). Error bars represent standard deviation of 3 independent replicates. * <i>C. raciborskii</i> was not axenic. Differences in growth curves were significant to <i>Aulacoseira granulata</i> (ANCOVA, p<0.001, F = 31.82) and <i>Cylindrospermopsis raciborskii</i> (ANCOVA, p<0.001, F = 16.34). No significant effect was observed to <i>Microcystis aeruginosa</i> (ANCOVA, p = 0.11, F = 2.62).