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Nitrogen and Phosphorus Flux Rates from Sediment in the Lower St. Johns River Estuary

Lynette M. Malecki, John R. White* and K. R. Reddy

Wetland Biogeochemistry Laboratory, Soil and Water Science Department, University of Florida, 106 Newell Hall, P.O. Box 110510, Gainesville, FL 32611



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  		Fig. 1. Location of temporal study sample sites along the Lower St. Johns River estuary.

 


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  		Fig. 2. Mean oxygen consumption in sediment cores collected in March 2002 at Beauclair Bluff (BB), Doctors Lake (DL), Collee Cove (CC), and Racy Point (RP) (n = 3 per site).

 


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  		Fig. 3. Changes in dissolved reactive phosphorus concentration of the water column under (a) anaerobic and (b) aerobic conditions from sediment cores of Beauclair Bluff (BB), Doctors Lake (DL), Collee Cove (CC), and Racy Point (RP) (n = 3 per site).

 


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  		Fig. 4. Changes in ammonium concentration of the water column under (a) anaerobic and (b) aerobic conditions from sediment cores of Beauclair Bluff (BB), Doctors Lake (DL), Collee Cove (CC), and Racy Point (RP) (n = 3 per site).

 




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