Fig. 3

Co-occurrence networks of unique genomes. A Co-occurrence of the overall prokaryotic community of WB; color of shape denotes taxonomy; shape relates to carbon fixation pathway detected in each genome; enrichment of genomes in either the 0.2-µm or 0.1-µm filter fraction is shown by the areas highlighted in red or blue. B Co-occurrence network of 0.2-µm filter samples focusing only on Gracilibacteria and non-CPR bacteria. Blue connecting lines indicate 1% FDR, while gray lines signify 5% FDR. Gracilibacteria were co-correlated and showed only one weak correlation with a cyanobacterial MAG