Marine Subsurface Microbial Community Shifts Across a Hydrothermal Gradient in Okinawa Trough Sediments

Figure 2

Relative sequence abundance, listed as % across the -axis, of 16S rRNA gene amplicons from Site C0014 sediment samples classified at the phylum level. Sample horizons are listed by increasing depth below seafloor. IODP sample names are listed along the -axis by increasing depth (meters) below seafloor, depth in parentheses. Site C0015, 600 m northwest and upslope of the hydrothermal vent (shown separately as the topmost sample), showed no current hydrothermal activity and is being compared to represent nonhydrothermal conditions within the Iheya North Field. Sequences included here are those identified as likely to represent indigenous taxa in Figure 1. See Table S1 for additional sequence information.