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Main Title Study of the Eutrophication of the Surface Waters of Pyramid Lake.
Author Hendrix, James L. ; Deguire., Marcel F. ;
CORP Author Mackay School of Mines, Reno, Nev.
Year Published 1973
Report Number DI-14-31-0001-3828; OWRR-A-047-NEV; W74-08938 ; OWRR-A-047-NEV(1)
Stock Number PB-232 998
Additional Subjects Cyanophyta ; Pyramid Lake ; Limnology ; Nevada ; Algae ; Brackish water ; pH ; Temperature ; Inorganic phosphates ; Cultures(Biology) ; Luminous intensity ; Growth ; Surface waters ; Ecology ; Eutrophication ; Nodularia spumigena ; Algal blooms ; Anabaena ; Water pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB-232 998 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 20p
The capacity of the Pyramid Lake, Nevada, environment to grow algae was studied. Pyramid Lake is a brackish terminal lake located in the Intermontane region. To understand the uniqueness of the lake's environment, both field and laboratory investigations were necessary. From field studies, the water quality, the pH of the lake, and the temperatures of the lake were obtained during the algal bloom in the summers of 1972 and 1973. By using phosphate concentration as the criteria, the lake could be classified as eutrophic. The main contributor to the bloom was the blue-green algae, Nodularia spumigena. Nodularia spumigena was isolated and cultured in the laboratory. Using the purified stock as inoculant, work using chemostats was conducted. In the fermentors, it has been determined that N. spumigena is sensitive to the light intensity. Light intensities of 100 foot candles for twelve hours per day cause the cell to bleach and then die.