Phytoplankton uptake of amumonium and urea during growth on oxidized forms of nitrogen

Abstract

p. 383, Figure 2. The legend to Figure 2 should read:. Fig. 2. Cumulative urea-N taken up as % total cellular N vs. time of incubation for T. pseudonana. Closed symbols = urea uptake; open symbols =urea uptake in the presence of NH4+. {up triangle, filled} = pre-depletion ([NO2- ] in culture medium = 5.0 μg-atom NO2-N 1-1 ), • = at depletion, {black small square} = post-depletion (16 h after nitrogenous nutrient could no longer be detected in culture medium). © 1982 IRL Press Ltd.