Vymazal, J., C.B. Craft, and C.J. Richardson. 1993. Response of the Everglades periphyton community to nitrogen and phosphorus additions. Pp. 468-472 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.

Abstract: Three Everglades plant communities–sawgrass (Cladium jamaicense), mixed sawgrass-cattail (Cladium-Typha) and slough (Eleocharis-Utricularia)–were fertilized with N, P, and N + P every two months beginning in August 1990 to determine the effect of nutrient additions on macrophyte and periphyton growth and species composition. Dried reed (Phragmites australis) stems were placed in the plots in May 1991 as a stubstrate for periphyton growth and removed three months later. At the sawgrass site, where blue-green algae and diatoms dominated, high P and N + P additions resulted in a significantly higher biomass. At the slough site, where similar algal groups dominated, only high N + P addition resulted in significantly higher biomass. At the mixed site, where filamentous green algae dominated, all fertilizer additions resulted in a decrease in periphyton biomass.

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