Fig. 5

Expression of selected genes in species with different trophic modes. Points represent the relative expression of the gene in a single species and sample. Values were computed by dividing the expression of the selected gene by the total expression for each species and sample. Values are separated by the trophic mode of the species they come from (Table 2). Genes within dashed rectangles have a higher relative expression in phagotrophs than in phototrophs and could be good candidates to infer bacterivory in natural assemblages (see Table S2 for more details)