Traditionally, parasites have been appreciated mainly for their direct negative effects on hosts. However, parasites are ubiquitous and are increasingly recognized as integral members of ecological communities, with the potential to alter dynamics at all levels of ecological organization. Our lab explores the population-, community-, and ecosystem-level consequences of parasites in aquatic systems. Our research projects span ecosystem boundaries, cut across taxonomic barriers, and employ experimental approaches, observational studies, and mathematical modeling. Although we seek to illuminate broadly-relevant ecological patterns, our research has management, conservation, and human health implications.