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Bioavailability of Organic Phosphorus in a Submerged Aquatic Vegetation–Dominated Treatment Wetland

^a University of Florida, Soil & Water Science Dep., Institute of Food and Agricultural Sciences, P.O. Box 110510, Gainesville, FL 32611-0510
^b DB Environmental Inc., Rockledge, FL 32955

View larger version (18K): [in a new window]   Fig. 1. A schematic orientation of Cell 4 in the Stormwater Treatment Area (STA)-1 West of the Everglades.

View larger version (31K): [in a new window]   Fig. 2. Sequential tangential-flow filtration procedure used in fractionations of the inflow and outflow waters.

View larger version (20K): [in a new window]   Fig. 3. Enzymatic hydrolysis of organic P in waters of Cell 4 of the Stormwater Treatment Area (STA)-1 West. The numbers in parentheses indicate the pH of the enzyme incubations. The term retn. is retentate and perm. is permeate. Bars indicate standard errors of the means.

View larger version (29K): [in a new window]   Fig. 4. Cumulative P mineralization in waters of Cell 4 of the Stormwater Treatment Area (STA)-1 West under different redox and pH conditions during 30 d of incubations. Bars indicate standard errors of the means.

View larger version (20K): [in a new window]   Fig. 5. Phosphorus distributions in surficial sediments from Cell 4 of the Stormwater Treatment Area (STA)-1 West. PEP, phosphoenolpyruvates; glyP, glycerophosphates; NMP, nucleoside monophosphates; polyN, polynucleotides; and GPEA, glycerophosphoethanolamines.