Fig. 3.

Biogeography of Prochlorococcus ESTUs in surface Tara Oceans metagenomes and relation to physico-chemical parameters. (A) Histograms of the relative abundance of Prochlorococcus ESTUs at each station sorted by similarity, as determined by hierarchical clustering (Bray–Curtis distance). Left panels indicate seawater temperature (°C) at each station. (B) Distribution of the ESTU assemblages, color-coded as in A, along the Tara Oceans transect. (C) NMDS analysis of stations according to Bray–Curtis distance between Prochlorococcus assemblages, with fitted statistically significant (adjusted P value < 0.05) physico-chemical parameters. Samples that belong to the same ESTU assemblage have been colored according to the color code defined in A, and contours of the same color gather all samples comprised within each cluster. NMDS stress value: 0.0985.