Fig. 2

Comparisons of viral genomic properties and compositions of AMG functions. Gene densities (a) and AMG ratios (b) of high-genome-completeness vOTUs, and AMG diversities (c, d) of lytic and temperate viral communities. The significance of the differences was determined by Mann–Whitney U test (*** P < 0.001). e NMDS of AMG compositions based on Bray–Curtis dissimilarity of KOs’ relative abundance in different samples. FL, free-living; PA, particle-attached; SE, sediment. f Occurred frequency of viruses carrying specific function in the whole lytic (blue bars) or temperate (yellow bars) viral communities. Red dots represent the differences of frequency between two lifestyles (lytic minus temperate). The asterisks on top of the bars indicate the statistical significance level (Fisher’s test, ** P < 0.01, *** P < 0.001)