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Influence of Nitrate and Phosphorus Loading on Denitrifying Enzyme Activity in Everglades Wetland Soils

J.R. Whitea and K.R. Reddya

a Univ. of Florida, Wetland Biogeochemistry Lab., 106 Newell Hall, P.O. Box 110510, Gainesville, FL 32611 USA



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  		Fig. 1 Station locations along a soil P gradient in WCA-2A (south of the S-10C water control structure) used in this study

 


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  		Fig. 2 Denitrifying enzyme activity vs. distance for the 0- to 10- and 10- to 30-cm soil depths for the August 1995 and February 1996 samplings from the transect in WCA-2A. Plotted are mean values and one standard error

 


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  		Fig. 3 Denitrifying enzyme activity vs. distance for the 0- to 10- and 10- to 30-cm soil depths for the August 1996 and March 1997 sampling from the transect in WCA-2A. Plotted are mean values and one standard error

 


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  		Fig. 4 Cumulative N2O production curves for the 0- to 10-cm soil depth located 0.2 km (impacted) and 10.1 km (unimpacted) from the water control inflow structure in WCA-2A. Plotted are means (n = 4) and one standard error. Samples were collected in March 1997

 


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  		Fig. 5 Denitrifying enzyme activity vs. total P for detritus and the 0- to 10- and 10- to 30-cm soil depths along the transect in WCA-2A

 




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