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Spatial Patterns of Labile Forms of Phosphorus in a Subtropical Wetland

Soil and Water Science Department, University of Florida, Institute of Food and Agricultural Sciences, 2169 McCarty Hall, PO Box 110290, Gainesville, FL 32611-0290

View larger version (23K): [in a new window]   Fig. 1. Geographic location of the Blue Cypress Marsh Conservation Area (BCMCA) and soil sampling locations.

View larger version (92K): [in a new window]   Fig. 2. (a) Digital Orthophoto Quarter Quads with 1-m spatial resolution from 2004 (data source: St. Johns River Water Management District) (yellow arrows represent water control structures). (b) Land use classes derived from aerial photographs (1997), map scale 1:12c000 (data source: St. Johns River Water Management District).

View larger version (21K): [in a new window]   Fig. 3. Semivariograms for total phosphorus (TP) (mg kg–1) and labile inorganic phosphorus (Pi) (mg kg–1).

View larger version (20K): [in a new window]   Fig. 4. Semivariograms for labile organic phosphorus (Po) (mg kg–1) and microbial biomass phosphorus (MBP) (mg kg–1).

View larger version (27K): [in a new window]   Fig. 5. Scatter diagrams of sample data versus estimated values of total phosphorus (TP), labile inorganic phosphorus (Pi), labile organic phosphorus (Po), and microbial biomass phosphorus (MBP).

View larger version (39K): [in a new window]   Fig. 6. Estimations for total phosphorus (TP) and labile inorganic phosphorus (Pi).

View larger version (34K): [in a new window]   Fig. 7. Estimations for labile inorganic phosphorus (Po) and microbial biomass phosphorus (MBP).

View larger version (29K): [in a new window]   Fig. 8. Moving correlations between labile inorganic phosphorus (Pi) and total phosphorus (TP) for window sizes of 7, 11, and 23.

View larger version (26K): [in a new window]   Fig. 9. Moving correlations between labile organic phosphorus (Po) and total phosphorus (TP) for window sizes of 7, 11, and 23.

View larger version (31K): [in a new window]   Fig. 10. Moving correlations between microbial biomass phosphorus (MBP) and total phosphorus (TP) for window sizes of 7, 11, and 23.

View larger version (24K): [in a new window]   Fig. 11. Spatial distribution of clusters for window size 23.