Primary production and uptake kinetics of ammonium and phosphate by Enteromorpha compressa in an ammonium sulfate industry outlet area

摘要: Abstract The primary production of Enteromorpha compressa (L.) Grev. varied between 0.02 and 10.8 mg C g dry wt.−1 h−1, with a total daily amounting to ca. 47 day−1. Maximum uptake ammonium takes place during the daytime is released night. half-saturation constant (Ks) maximum velocity (Vm) were 336 31 μg l−1 515 59 h−1 for phosphate respectively. Additions high concentrations (ca. 500–1000 N l−1) caused marked decrease in net by 40%. An optimum was noted at N/P ratios 3–12. ecological significance constants as well discussed comparisons are made other macroalgae phytoplankton. It suggested that these parameters might be species specific large extent they determine outcome interspecific competition different nutrient concentrations.