The mission of the Department of Limnology and Oceanography is to gain and communicate scientific knowledge on the ecology of pelagic and benthic life in inland waters and marine ecosystems ranging from glacier-fed streams to saline lakes and from coastal seas to the deep sea including hydrothermal vents. The main goal is to understand the biodiversity and ecosystem functions, and the interactions of these with the physical and chemical environment. We combine concepts and theory from ecology, physiology and biogeochemistry with cutting-edge technology to achieve this endeavour. Organisms we study include viruses, microbes and metazoans and their interactions from the population to the ecosystem level. The Department of Limnology and Oceanography also facilitates and supports education in Biology and Environmental Sciences at the University of Vienna and on an international level.