Fig. 3

The abundance of microbes and ratios of archaea. Abundances were measured using (a) cell counting and (b) qPCR techniques. The X-axis represents cell counts and SSU rRNA gene copies per milliliter of sediment, respectively. The error bars represent standard deviation. (c) Ratios of archaea/prokaryotes were calculated using qPCR data. Data from layers ranging between 0 and 50 cmbsf are presented in this figure, and full data are shown in Fig. S4.