This course is a general introduction to freshwater systems. The characteristics that define the different types of freshwater systems will be examined. The abiotic and biotic components of freshwater systems will be identified and examined. Building on that base knowledge, the way abiotic and biotic components interact to produce the complex relationships and interactions observed in freshwater systems will be examined through examples and case studies. Lastly, students will be introduced to some of the major threats freshwater ecosystems are facing and the conservation, restoration, and management actions being taken to reduce, mitigate, or eliminate these threats.