Fig. 2.

Diversity and distribution of Arctic Ocean Chloroflexi MAGs. a Maximum likelihood tree of Chloroflexi based on partial 16S rRNA gene sequences. Blue taxa are from Canada Basin metagenomes and red taxa are from the six Chloroflexi MAGs. Bootstrap values of >70% are shown (100 replicates). b Distribution of MAGs in the Canada Basin based on metagenome coverage at the surface, subsurface chlorophyll maximum (SCM) and fluorescent dissolved organic matter maximum (FDOM max). c Distribution of MAGs in global ocean metagenomes based on fragment recruitment. Two deep ocean SAR202 SAGs from Landry et al.¹⁸ were included for comparison. Location of TARA ocean metagenomes (red) and bathypelagic metagenomes (green) are shown on the map generated using Ocean Data View version 4.7.7⁴²