Fig. 5

Schematic illustrating metabolic genes and gene expression in benthic and planktonic environments across the freshwater-to-marine transect. Genes with relative abundances and expression levels at least twice higher than in those of other environments are shown. No transcriptomics data were available for marine sediments at sites 8 and 9. Key on right: rectangles with numbers represent metabolic pathways; ovals with letters indicate the main taxa expressing these genes