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Alexandrium pacificum cell abundance at three sites (Site 1 dark blue; site 3 blue and site 4 light blue) across (A) 2016; (B) 2017; and (C) 2018 bloom events. Dark purple line is paralytic shellfish toxin (PST) concentration in mussels (mg/kg) collected from Area A; yellow line is PST concentration in mussels (mg/kg) from Area B; green line is DPI Phytoplankton Alert Level (5000 cells L−1) and red line is DPI Regulatory Limit for PST in shellfish (mg/kg) in shellfish.
