Fig. 2

Heatmap of Bering Strait (BSt) Gene Ontology (GO) functions with significant peptide spectrum match (PSM) log2 fold changes (Bonferroni-corrected p-value < 0.01 from a two-tailed test of proportions) between time points per experiment. Column 1: initial BSt microbiome sample (indicated here as day 0) compared with day 1 with algal OM input, column 2: day 1–day 6 with OM, column 3: initial BSt (day 0) to day 1 in the control, column 4: day 1–day 6 in the control (>1.0 µm removed). Color shading indicates the degree of log2 fold change as seen in the color key. Colored bars on the left indicate the seven clusters of changing functions as outlined in Table 1