In the Canadian Prairies, wetland drainage has resulted in the loss of more than 40 percent of natural wetlands. The impacts associated with this drainage are largely unmitigated. Wetlands are key ecosystem features that provide numerous services, like water purification, that are integral to social and ecological systems. Because wetlands occur largely in depressions, they regulate stream flow by acting as reservoirs for snow and rain, and many are places where groundwater can be replenished. In the prairie climate, the presence of water lends these systems to being a crucial habitat for many organisms.