Fig. 6: Drivers of the abundance and expression of metabolic genes in Tara Oceans metagenomes.
From: Molecular hydrogen in seawater supports growth of diverse marine bacteria
a–c, This analysis is visualized for energy-converting rhodopsins (a), CO dehydrogenases (b) and aerobic H2-uptake hydrogenases (c). The top and middle panels show random forest modelling of the environmental variables that best predict marker gene abundance in metagenomes and metatranscriptomes, respectively. The relative importance (percentage increase in mean squared error, %IncMSE, as a measure of decrease in model accuracy) of the top ten most important variables for each model is shown in addition to a randomized variable used to benchmark importance. The bottom panel shows simple linear correlations between the metagenomic abundance of each gene and water depth. For each gene, Pearson’s R2 values show goodness of fit and P values confirm that each slope significantly deviates from zero.
