Figure 4From: Theoretical constraints of physical and chemical properties of hydrothermal fluids on variations in chemolithotrophic microbial communities in seafloor hydrothermal systems Plots of (A) Fe, (B) Mn, (C) Fe/Cl, and (D) Mn/Cl versus pH for hydrothermal vent fluids. These plots clearly show that concentrations of Fe and Mn in hydrothermal vent fluids are mainly controlled by pH.Back to article page