Impact of plant assemblages on nutrient removal in constructed wetlands
by Ralph E. Spayd III; Shirley E. Clark; Katherine H. Baker
International Journal of Environment and Waste Management (IJEWM), Vol. 11, No. 3, 2013

Abstract: Four different mesocosm scale constructed wetlands - monoculture (Carexstipata), self-designed (passive) community, mixed planted monoculture-passive community and a non-vegetated control - were compared to assess the effects of plant community composition on the removal of inorganic nutrients from agricultural runoff (synthetic tile water). The mixed and self-designed systems consistently produced effluent NO3-N concentrations significantly below 10 mg/L, and had higher rates of evapotranspiration. Results indicate the type and composition of the plant community can impact the performance of constructed wetlands. Therefore, self-design of the plant community through the existing seed bank may increase the effectiveness of wetlands in treating agricultural runoff.

Online publication date: Sat, 20-Sep-2014

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