62 Chapter 2 Figure 4. Abundance, distribution and activity of key microbial groups in sediments from the three study sites presented with selected geochemical data. Relative abundances (%) of archaeal families, based on 16S rRNA gene sequencing, are color coded according to the legend to the left and match depths as in other panels. The designation “fam” indicates a poorly resolved family. The thickness of bars corresponds to the depth resolution indicated in materials and methods. The normalized genome coverage (ngCOV) of metagenome-assembled genomes (MAGs) representing methanotrophs (one genome) and methanogens (four genomes) is displayed next, followed by methane production rates in µmol methane wet
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