Fig 3. Principal component analysis scores plot including data from high-concentration exposures.

3-D scores plot from unsupervised principal component analysis based on pareto-scaled and positive-control-subtracted hormone concentrations, from high-exposure groups only. The first three components explained 95% of the total variation. The plot shows a larger dispersion of the data from M. aeruginosa PCC7806 exposures, but individual observations from these exposures also clustered further away from the positive control and microcystin exposures.