In addition to the MDS plot for the total plankton community (A), plots for the plankton community without C. polykrikoides (B) and without C. polykrikoides and picoplankton (picoeukaryotes, cyanobacteria, and heterotrophic bacteria) (C) are also shown. ‘2D Stress’ indicates how faithfully the high-dimensional relationships among the samples are represented in the 2-d ordination plots.