(A and B) Concentrations of [NO3−] and [S0] in single Thioploca filaments collected at different sediment depths from Station 7. (C) Storage concentration in sheathless sulfur bacteria filaments from the sediment surface (0 to 2 cm) at Station 4. Open circles, T. araucae; solid circles, T. chileae; open triangles, SCM; dotted symbols, filaments from the deepest sediment section (13 to 16 cm); open diamonds, sheathless filaments.