Investigations of the Algal Productivity of Selected and Limited Sites Along the Western Shore of Bear Lake, Utah-Idaho
Date of Award:
Master of Science (MS)
Donald B. Porcella
Donald B. Porcella
William F. Sigler
Eldon J. Gardner
Investigations of limited and selected areas along the western shore of Bear Lake were carried out to determine the relative algal productivity with relation to nutrient concentrations and incident sunlight. The primary objective of the study was to determine the effects of nutrient changes in the littoral zone on the western shore on the algal productivity and to establish a baseline of data.
l4C02 radioisotope was used as the principal measurement of organic carbon production as an estimate of productivity. Chlorophyll extracts were made and used as a secondary method for the estimation of productivity. Chemical analysis of the water was also carried out during the study to determine the effect of the various nutrients on algal productivity. Samples were collected from May 7, 1971 to September 6, 1971 on randomly selected days.
Average milligrams of carbon assimilated per cubic meter per day ranged from about 1 to 362 with a mean of 30.0 mg. During the study the orthophosphate values ranged from 0.0 to 325 ug/l with a mean of 34 ug/I.
Nitrite values ranged from 0.0 to 1.0 ug/l as nitrogen, with a mean of .50, and nitrate values ranged from 0.0 to 6.0 ug/l as nitrogen, with a mean of .05. Ammonia values ranged from 2.0 L 500 ug/l as nitrogen, with a mean of 95 ug/l, and alkalinity values ranged from 224 to 327 mg/l as CaC03 with a mean of 277 mg/I.
Productivity estimates in this limited study indicate that at this time the littoral zone on the western shore of Bear Lake is generally unpolluted and quite oligotrophic.
Sigler, John William, "Investigations of the Algal Productivity of Selected and Limited Sites Along the Western Shore of Bear Lake, Utah-Idaho" (1972). All Graduate Theses and Dissertations. 333.
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