Regional hydrology controls stream microbial biofilms: evidence from a glacial catchment T. J. Battin ∗ , A. Wille, R. Psenner, and A. Richter Department of Limnology, IECB, University of Vienna, A-1090 Vienna, Austria Institute of Zoology and Limnology, University of Innsbruck, A-6020 Innsbruck, Austria Department of Chemical Plant Physiology, IECB, University of Vienna, A-1090 Vienna, Austria...