Nitrogen metabolism in the brackish lake Nakanoumi. I. - Uptake rate of inorganic nitrogen by phytoplankton.

Nitrogen Metabolism in Phytoplankton

Inorganic nitrogen metabolism by Antarctic phytoplankton with special reference to ammonium cycling

Nitrogen metabolism of planktonic populations in coastal waters of the southern Scotia Sea was studied in February-March 1981 aboard R/V M e l d l e . In spite of the high concentration of nitrate present in these waters (21 to 29 FM), up to 93 % of phytoplankton nitrogen was assimilated in the form of ammonium, with the overall mean being 78 %. Time course experiments showed that uptake of nit...

Effects of Inorganic Nitrogen Enrichment on Lake Huron Phytoplankton: An Experimental Study

Effects of inorganic nitrogen (N03) enrichment on phytoplankton were studied using a factorial design experiment. Using species assemblages from Lake Huron waters, the effects of NO] and total phosphorus (TSP) additions on species abundance and composition were monitored. The speciesnutrient relationship was determined by canonical correspondence analysis (CCA). In addition, divisional differen...

Growth and nitrogen content of sunflower as affected by the rate and form of nitrogen

Metabolism of Labeled Organic Nitrogen in Soil: Regulation by Inorganic Nitrogen

Regulation of organic N metabolism by inorganic N availability was investigated in short-term laboratory incubations of soil. A C-, N-labeled organic N substrate was produced by growing Pseudomonas stutzeri in labeled media and isolating a cytoplasmic fraction. This was added to soils that had been preincubated with glucose or glucose plus NHJ to induce conditions of N deficiency or sufficiency...