Great Lakes Communities and Ecosystems
Water Cycle How the cycle works Added human pressures

WETLANDS
Wetlands are ecosystems that are inundated at least part of the year. These areas support water-tolerant vegetation and water-dependent organisms. Nearly two-thirds of the Great Lakes region's original wetlands have already been destroyed, thus eliminating the important wetland functions of water cleansing, flood control, sediment trapping, fish spawning, and provision of wildlife habitat.

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Water Cycle diagram

© 2003 Union of Concerned Scientists Riparian ZonesGreat LakeWetlandsGroundwaterForestsSurface and Subsurface RunoffSurface WaterInfiltrationEvaporationWatershed BoundaryTranspirationPrecipitationCondensation