Fig. 4

Coverage of MAGs across stations. The mean coverage of each MAG in a given set of reads. Top shows prokaryotic MAGs, and bottom shows eukaryotic MAGs. Coverage normalised to coverage per million reads. Coverage not shown where fewer than 50% of bases in a MAG had any read aligned. The left-hand heatmaps show MAGs recovered from polar assemblies, and right-hand heatmaps shows those recovered from non-polar assemblies. Coverage in reads from polar stations is shown on a blue scale, and coverage in non-polar stations is shown on a red scale. MAGs are ordered by taxonomy. Each MAG has been given a taxonomic label of the most specific rank to which taxonomy had been determined. MAGs involved in cross-kingdom associations are highlighted by a yellow band and with a shape (circle for non-polar or square for polar) to the left of their name. The shading of the shape indicates which MAGs are associated, for example, each eukaryotic MAG with a solid square has an association with each prokaryote with a solid square