Fig. 1.

a Photomicrograph (400×) showing the filament morphology and size of Cyanobacterium ESFC-1, b Epifluorescent image of an ESFC-1 biofilm. Image is a calculated maximum intensity projection of a 50 μm z-stack. Red is autofluorescent ESFC-1 trichomes. Cells were fixed with 10 % formaldehyde prior to imaging. c Scanning electron microscopy image of ESFC-1 trichomes. ESFC-1 samples were fixed with 10 % formaldehyde, rinsed with sterile water, spotted onto a silicon wafer, air-dried and coated with ~5 nm of gold. Imaged with an FEI Inspect F SEM (Hillsboro, OR). For all panels, scale bar represents 10 μm