Spatiotemporal changes in soil phosphorus characteristics in a submerged aquatic vegetation-dominated treatment wetland

Journal of Environmental Management
Manuel F ZamoranoDelia Ivanoff

Abstract

In South Florida, stormwater treatment areas (STAs) are used to reduce phosphorus (P) in runoff from agricultural areas before water is discharged into the Everglades Protection Area. The Everglades STAs retain a significant amount of P and play an important role in Everglades restoration. Wetland soils generally are long-term sinks for P; therefore, the sustainability of STA treatment performance can be assessed by tracking changes in soil characteristics. This study evaluated the spatiotemporal changes in soil P and related physicochemical characteristics in the unconsolidated floc and underlying surface soil layer (0-10 cm) of a 920-ha submerged aquatic vegetation (SAV)-dominated wetland (STA-2 Cell 3). Physicochemical properties in soil cores collected in 2003, 2007, 2009, and 2015 were evaluated and compared using geostatistical methods. Results indicated a gradual increase in floc depth over time. Total P (TP) concentrations in the floc were significantly higher than in the surface soil. Slight but statistically nonsignificant increases of mean TP in floc were observed. There was a significant increase in P storage in the floc layer between 2003 and 2007, with more P stored in the surface soil layer. Interpolated maps sho...Continue Reading

Citations

Jun 28, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Carolyn M RodakJason R Vogel
Dec 8, 2020·The Science of the Total Environment·Forrest E DierbergDelia B Ivanoff
Aug 3, 2021·Journal of Environmental Quality·Bobby G DuerschJ William Louda

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