|Sutter, L.A., J. Vymazal, C.B. Craft, and C.J. Richardson. 1993. Effects of phosphorus loading and hydroperiod on sawgrass, Cladium jamaicense. P. 467 in: Landin, M.C. (ed.), Wetlands: Proceedings of the 13th Annual SWS Conference, New Orleans, LA, June 1992. SWS South Central Chapter, Utica, Mississippi. 990 pp.|
Phosphorus loading and altered hydroperiod may contribute to the decline of sawgrass (Cladium jamaicense) in the Florida Everglades via invasion of cattail into nutrient-enriched deeper water habitats and by colonization of drier sites by upland plant species.
The effects of P loading and flooding depth on sawgrass productivity were investigated in a controlled greenhouse experiment using a factorial design with five P concentrations (0.0, 0.04, 0.08, 0.15, and0.3 mg/l) and three flooding depths (0, 11, and 22 cm).
Preliminary results suggest that increased P concentrations have little effect on the aboveground sawgrass biomass. Leaf tissue P concentrations increased with flooding depth and P dosing up to the 0.15 mg/l concentration, after which a decrease in tissue P was observed. Periphyton, other macrophytes and belowground sawgrass biomass consumed significant amounts of P.
Based on these preliminary data, low doses of P at the tested depth do not have a significant effect on sawgrass productivity.
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