This week has seen major changes in phytoplankton smaller than 10 µm compared to the 4th May (see blog for 5th May). The Multisizer figure shows that phytoplankton size distribution is the same from the surface down to 25 m and that the Phaeocystis sized cells (5.5 µm last week) are absent. It is only at 50 m (black line), near the seabed that cells of 6.2 and 7.2 µm appear. Otherwise, the phytoplankton are numerically dominated by cells just over 3 µm throughout the water column with abundance in the region of 50,000 per mL at 50 m. Lines on plot: red = surface, green = 10m, blue = 25m, black = 50m