Fig. 1.

Taxonomic community similarity clusters in the 0.22- to 3-$\mathrm{\mu }$m size fraction across Tara Oceans sites (replotted using data from ref. 9). (A) Community similarity is shown with colors by projecting the Taxonomic Jaccard dissimilarity matrix into the “rgb” (red-green-blue) color space using the t-SNE (t-distributed stochastic neighbour embedding) dimension-reduction algorithm (10). (B) Links between community similarity clusters (dimensionless $x$ and $y$ coordinates) and spatial location (colors corresponding to ocean basins). SI Appendix, Fig. S1 has an interpretation of B.