Assessment of Phytoplankton Nutrient Limitation in Productive Waters: Application of Dilution Bioassays

摘要: Excessive nutrient loads to aquatic systems can complicate otherwise predictable relationships between concentrations and phytoplankton biomass. We conducted six bioassays on surface assemblages collected from productive Lake Apopka, Florida, measure the effect of reduction growth nutritional state. water was mixed with one three diluents create a gradient ambient concentrations; nitrogen (N) phosphorus (P) limitation at each level dilution evaluated in 2 × 2 factorial design. While addition N clearly increased undiluted Apopka water, became more P limited particles (30–60% dilution). Regression algal yields onto total our bottle experiments indicated that an 8 μg∙L−1 change leads only 1 μg∙L−1 chlorophyll yield, probably due high concentration lake. Because inf...