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Pinus echinata, Bromus mollis

Source: U.S. Army Corps of Engineers (1987).

Source: U.S. Army Corps of Engineers (1987).

habitats fish and wildlife, for flood control, for nonpoint-source water pollution control, or for wastewater treatment.

Wetlands, whether constructed or natural, purify wastewater by physically entrapping particulate matter in the soil and organic litter, by the action of microorganisms on the plants and in the soil, and by uptake directly by macrophytes, especially of nutrients. Because the soil has both aerobic and anaerobic zones, wetlands can serve as a nitrogen sink by both nitrifying and denitrifying. Wastewater treatment systems tend to use either floating or emergent plants.

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