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Biol Bull 69: 75-81. (August 1935)
© 1935 Marine Biological Laboratory
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THE UTILIZATION OF SOLAR RADIATION BY ALGÆ AT DIFFERENT DEPTHS IN LAKES

C. JUDAY 1 and H. A. SCHOMER 1

1 From the Limnological Laboratory of the Wisconsin Geological and Natural History Survey

1. The depths of maximum oxygen production and of maximum percentage of utilization of solar radiation were determined for Chlorella pyrenoides and Coccomyxa simplex in three lakes.

2. The maximum yield of oxygen was obtained at a depth of 5-6 m. in the most transparent lake and at 0.25 m. in the one with highly colored water.

3. The maximum percentage of utilization of solar radiation was found at a depth of 10 m. in the more transparent waters and at 1 m. in the highly colored water.

4. The highest utilization was 11.3 per cent in the colored water and 4.3 to 9.1 per cent in the other two lake waters.






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Copyright © 1935 by the Marine Biological Laboratory.