Correlation between oxic and anoxic RNAseq analysis. The scatter-plot represents a comparison of log2 fold changes between the oxic and anoxic RNAseq data sets. (A) Colour is used for the regulated genes (log2 > 1 or < -1, green and red spots, respectively) to indicate whether changes are of similar magnitude under both conditions (log2 ratio difference between approaches < 1, green spots) or are biased towards one condition (log2 ratio difference > 1, red spots). Non-regulated genes (log2 < 1 and > -1) are shown as grey spots. (B) Genes were grouped into six clusters according to their expression pattern as described in Results. For a complete list of genes and information on their functions, see Additional file 1: Table S1.