Barry Warner studies the dynamics of natural, restored, and created wetlands using a variety of ecological and paleoecological indicators. His methods for studying wetland ecosystems encompass a variety of spatial scales (local, regional, global) and temporal scales (seasonal, yearly, centenary, millennial). Professor Warner has researched wetlands across Canada, the United States, Mexico, Chile, Europe, Scandinavia, Russia, Japan, and Iraq. His research focuses on the dynamics of wetland ecosystems, utilizing ecological and paleoecological methods such as sediment stratigraphy, age dating, and biological indicators, including pollen, plant macrofossils, and soil protozoa. His academic interests include wetland ecology, peatlands, and the use of ecological indicators to study wetland environments, alongside bioinformatics and systematics related to aquatic ecosystems and their conservation. Professor Warner addresses increasingly complex water challenges through his research and teachings.