More research on the ecological applications of cyanobacteria needs to be performed. Recently they have been shown to play a significant role in the stabilization of coastal sediments by reducing hydrodynamic erosional forces (Noffke et al. 2003). During low hydrodynamic disturbance, cyanobacteria enhance deposition of sediments by baffling, trapping, and binding while during periods of intensive hydraulic reworking, they shelter their substrata against erosion or they permit flexible deformation of sandy sediments. The exact role of cyanobacteria in fighting erosion has to be investigated, considering different types of sediments and different environmental settings.