Oceans, water, and the maritime world are at the center of Professor Wintersteen’s research interests in the field of environmental history. Her work explores the history and ecology of fisheries industrialization and the impacts of this process at a global scale, especially as it relates to the food system. Geographically, her research has focused primarily on the Pacific Coast of the Americas (especially Chile, Peru, the United States, and their coastal waters)—and more recently, the Gulf Coast.