Fig. 2: Initial relative abundances of the different phytoplankton groups.

Relative abundances of the four microphytoplankton genera (a, c; based on data of Supplementary Table 1) and of the three picophytoplankton subgroups (P1–P3; b, d; based on data of Supplementary Table 2) at the start of the experiment at Station West (a, b) and East (c, d) was determined via light microscopy (a, c) and flow cytometry (b, d).