. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DECOMPOSITION ORGANIC MATTER IN SEA WATER 473 closed containers, the amount of oxygen consumed in 6 days, per liter of water, was cc. at 2° C., cc. at 12°, cc. at 22° and cc. at 34° C. 2. Abundance of available organic matter. This was demonstrated by the fact that when wrater was filtered through different types of filters, which tended to remove some of the suspended organic matter, such as Seitz filters, the rate of decomposition of the organic matter, as measured by the amount of oxygen consumed in a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DECOMPOSITION ORGANIC MATTER IN SEA WATER 473 closed containers, the amount of oxygen consumed in 6 days, per liter of water, was cc. at 2° C., cc. at 12°, cc. at 22° and cc. at 34° C. 2. Abundance of available organic matter. This was demonstrated by the fact that when wrater was filtered through different types of filters, which tended to remove some of the suspended organic matter, such as Seitz filters, the rate of decomposition of the organic matter, as measured by the amount of oxygen consumed in a given period of time, was considerably reduced. 3. The water mass itself, as modified by distance from bottom, by its relation to photo- synthetic zone, by latitude, by movements, especially oceanic circu- lation and vertical mixing. In water taken from the Gulf of Maine, the greatest oxygen consumption took place at a depth of 40 meters, £22 <20 O 18 j5 16 £ 14 H 12 10 a. J2 4 % 2 « o. u b £ .9 ^ S u D H .6 £ c O •5 U 7 •3 o 2 ^ •2 x .1 o 0 6 8 10 12 14 16 18 20 TIME IN DAYS FIG. 1. Influence of temperature upon bacterial development and oxygen consumption in sea water. while at Georges Bank, with greater vertical circulation, in the water just above the bottom. 4. Concentration of available inorganic nutrients; the influence of available nitrogen upon the decomposition of carbohydrates has already been mentioned; certain preliminary investigations also point to the significance, in this process, of available phosphorus. Influence of Temperature In order to illustrate further the effect of temperature upon the course of bacterial development and oxygen consumption, the results of a detailed and controlled experiment are reported in Fig. 1. The oxygen bottles were incubated under water. Although the maximum rate of bacterial development was reached as 22° C., within 2 days,. Please note that these images are extracted from scanned page images that may
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
