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Biol Bull 79: 231-236. (October 1940)
© 1940 Marine Biological Laboratory
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DECOMPOSITION AND REGENERATION OF NITROGENOUS ORGANIC MATTER IN SEA WATER

III. INFLUENCE OF TEMPERATURE AND SOURCE AND CONDITION OF WATER

THEODOR VON BRAND 1 and NORRIS W. RAKESTRAW 1

1 From the Woods Hole Oceanographic Institution, Woods Hole, Mass.

The source of the water is important in determining the nature of the decomposition cycle. Oxidation of ammonia to nitrite is retarded in water from the deep sea (1200 m.). Inconclusive results were obtained from efforts to sterilize both the water and the original organic matter, but it is evidently easier to eliminate organisms responsible for the oxidation processes than those which may participate in the formation of ammonia. The speed of the whole decomposition cycle was more than doubled by an increase of 6° or 8° in temperature. Growth of diatoms is possible at any stage in the cycle of decomposition.






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