A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem. Wetlands play a number of roles in the environment, principally water purification, flood control, carbon sink and shoreline stability. Vegetation of aquatic plants, adapted to the unique hydric soil. Community composed of hydric soil and hydrophytes. Wetlands, marsh, swamp, bog, sunset, aerial footage, flying, flat large big plain.