Depth profiles of Lake Mondsee from September 2003. Samples were taken from 0 to 40 m (A, B, and C) and 0 to 60 m (D, E, and F), respectively. (A and D) Temperature, pH, and conductivity. (B and E) Total bacterial numbers, SOL bacteria numbers, and chlorophyll a. (C and F) Composition of SOL cluster community.