. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 458 CHARLES E. RENN assumed that the oxygen consumed in this interval was utilized in the biological oxidation of the organic carbon in the plankton material. On this basis a little over 50 per cent of the plankton carbon was oxidized during the five days of activity. The organic matter of the mud is more stable—in the same interval about 7 per cent of this carbon under- went oxidation. In the mud and plankton mixtures the amounts of organic carbon oxidized to carbon dioxide are not significantly different at any time from t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 458 CHARLES E. RENN assumed that the oxygen consumed in this interval was utilized in the biological oxidation of the organic carbon in the plankton material. On this basis a little over 50 per cent of the plankton carbon was oxidized during the five days of activity. The organic matter of the mud is more stable—in the same interval about 7 per cent of this carbon under- went oxidation. In the mud and plankton mixtures the amounts of organic carbon oxidized to carbon dioxide are not significantly different at any time from the values that would be estimated from the consumptions of the separate 2 4 PARTS PLANKTON I PART PLANKTON 2 PARTS MUD 2 PARTS PLANKTON I PART MUD. 4 PARTS MUD __ _t_ j ' . 1 I IO 2O 3O 4O 5O 6O 7O BO 9O IOO IIO I2O TIME IN HOURS FIG. 1. Biological oxygen consumption in sea water suspensions of mud (lower set of curves), of ground plankton (upper curves), and of mixtures of mud and plankton (intermediate curves). components. There is a slight increase in the proportion of carbon oxidized in the mixtures, but this effect is most pronounced in the lower concentration of plankton and may be related to the dilution effect observed in the third experiment. Breakdown of Plankton Extract A second experiment was prepared, using plankton extract instead of fine, participate plankton. Mud, plankton-extract, and sea water were placed in sets of duplicate respirometers as follows:. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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