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Biol Bull 83: 273-282. (October 1942)
© 1942 Marine Biological Laboratory
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DECOMPOSITION AND REGENERATION OF NITROGENOUS ORGANIC MATTER IN SEA WATER

V. FACTORS INFLUENCING THE LENGTH OF THE CYCLE; OBSERVATIONS UPON THE GASEOUS AND DISSOLVED ORGANIC NITROGEN

THEODOR VON BRAND 1, NORRIS W. RAKESTRAW 1, and J. WILLIAM ZABOR 1

1 From the Woods Hole Oceanographic Institution, Woods Hole

1. Low temperature may inhibit nitrite formation completely or may only retard it, probably depending upon the particular organisms present.

2. Oxidation of nitrite to nitrate was less inhibited by low temperature than the formation of nitrite from ammonia.

3. No clear-cut difference was observed between the decomposition of diatoms and that of ciliates.

4. Clear evidence was found that under certain conditions ammonia, nitrite and nitrate formation can go on simultaneously.

5. Preliminary experiments gave no evidence for a fixation of nitrogen, but indicated that dissolved organic nitrogen may possibly be involved in the nitrogen cycle.






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