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Phosphorus Sorption by Sediments in a Southeastern Coastal Plain In-Stream Wetland

USDA-ARS-Coastal Plains Soil, Water and Plant Research Center, 2611 West Lucas St., Florence, SC 29501

View larger version (18K): [in a new window]   Fig. 1. Location of sediment sampling sites for the in-stream wetland.

View larger version (14K): [in a new window]   Fig. 2. Regression relationships between sediment organic C (SedOC) concentrations and (a) total P (TP) and (b) P sorption maxima (Pmax) values.

View larger version (13K): [in a new window]   Fig. 3. Regression relations between P sorption maxima (Pmax) and total P (TP) values.

View larger version (23K): [in a new window]   Fig. 4. Regression relations between total P (TP) and (a) oxalate-extractable Al (Alox) and (b) oxalate-extractable Fe (Feox) concentrations and P sorption maxima (Pmax) concentrations with (c) Alox and (d) Feox.

View larger version (40K): [in a new window]   Fig. 5. Regression relations between (a) phosphorus sorption maximum (Pmax) and pyrophosphate-extractable Al (Alpyro) concentrations and (b) TP and Alpyro + pyrophosphate-extractable Ca (Capyro).