Figure 3

Microbial structures from the Shivlinga site: (A and B) microbial cell filaments from streamers of VWM and WG3, respectively; (C) microbial biomass of DG3; (D) diatoms from the surface of the microbial mass which makes up WG4 and DG4 (D1 and D2 respectively); (E and F) cells from the core of the microbial mass which makes up DG4 and WG5, respectively; (G) Chroococcales-like cyanobacteria in the core of the microbial mass which makes up DG3; (H) fungal hyphae and diatoms near the edge of the microbial mass which makes up DG4. All images were produced using phase contrast microscopy except for (C) that used laser scanning confocal microscopy. For (C1), excitation was carried out at 488 nm and detection at 630–650 nm; (C2) is a differential interference contrast image with blue arrows indicating diatom cells; and for (C3), excitation was carried out at 543 nm and detection at 650 nm.