Figure 2

Maps of the Western English Channel showing the changing relative abundance of three central carbon metabolism genes and PRMT scores for carbon dioxide over 4 monthly averages in 2008. The three top rows show weekly averages for the relative gene copy number for Cyanase (4.2.1.104), Carbon-monoxide dehydrogenase (1.2.99.2) and Malate dehydrogenase (1.1.1.37). As the predicted metagenomes are created by merging the relative proportions of genomes from taxa closely related to the 16S rRNA taxa, the copy number refers to the number of copies of that gene found in that predicted metagenome, as these numbers are often very small we decided to show the absolute value rather than the relative percentage. These are 3 enzymes (out of 30) that contribute to the PRMT scores for CO₂ as calculated in the fourth row. For each graph, values were averaged across each day within a week during the given month. The predicted copies of a gene in each calculation are normalized, and therefore are not absolute. PRMT scores in red suggest a relative capacity of that assemblage to consume CO₂, whereas scores in blue suggest a relative capacity to accumulate CO₂.