Biogeochemistry-6 Phosphorus

Biogeochemistry-6 Phosphorus - 1 Phosphorus Phosphorus...

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Unformatted text preview: 1 Phosphorus Phosphorus AEROBIC ANAEROBIC Phosphorus in wetlands Phosphorus in wetlands Peat Peat accretion accretion PIP [Fe, Al or Ca- bound P] Adsorbed P Litterfall DOP . Plant biomass P DIP PIP POP DIP POP DOP DOP DIP DIP Inflow Outflow Periphyton P Water Phosphorus Forms Water Phosphorus Forms (Water Quality Parameters) (Water Quality Parameters) Phosphorus Dissolved Inorganic Phosphorus (DIP) or Dissolved Reactive Phosphorus (DRP) Water samples filtered through 0.45 um membrane filter and analyzed for ortho-P. Dissolved organic P (DOP) Water samples filtered through 0.45 um membrane filter and analyzed for organic P Particulate inorganic P (PIP) Particulate organic P (POP) 2 Phosphorus in Wetlands Phosphorus in Wetlands Soil porewater phosphorus [dissolved] Organic phosphorus Phosphorus loading Uptake by algae and plants Metal oxides and clay mineral surfaces Discrete phosphate minerals Soil Phosphorus Forms Inorganic P KCl-Pi - Bioavailable P NaOH-Pi - Fe-/Al- P [slowly available] HCl-Pi - Ca-/Mg- P [slowly available] Organic P Microbial Biomass P - Bioavailable P NaOH-Po - Fulvic Acid -P [slowly available] NaOH-Po - Humic Acid -P [very slowly available] Residual P -Highly resistant [unavailable] 2% 29% 6% 50% 13% 1% 71% 11% 7% 10% KCl-Pi (available) Fe- and Al-bound P Alkali extractable organic P Ca- and Me-bound P Residual P Stream Sediments Stream Sediments Mineral soil Mineral soil Okeechobee Drainage Basin Okeechobee Drainage Basin DL-Stream Total P = 877 mg P/kg Rucks-Stream Total P + 93 mg P/kg 3 1% 7% 24% 21% 47% KCl-Pi (available) Fe- and Al-bound P Alkali extractable organic P Ca- and Me-bound P Residual P <0.1% 1% 4% 72% 23% Organic Wetland Soils Organic Wetland Soils Drainage Effects Drainage Effects Peat Depth < 10 cm Total P = 836 mg P/kg Peat Depth > 30 cm Total P = 411 mg P/kg...
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This note was uploaded on 03/01/2010 for the course PCB 4683 taught by Professor Williams,j during the Spring '08 term at University of Central Florida.

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Biogeochemistry-6 Phosphorus - 1 Phosphorus Phosphorus...

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