Record Display for the EPA National Library Catalog
RECORD NUMBER: 1733 OF 1860Main Title | Thermal Effects on Biological Production in Nutrient Rich Ponds. | |||||||||||
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Author | Siewaer, Horst ; | |||||||||||
CORP Author | Wisconsin Univ., Madison. Water Resources Center. | |||||||||||
Year Published | 1972 | |||||||||||
Report Number | DI-14-01-0001-1870 ;DI-14-31-0001-3050; OWRR-A-020-WIS ;OWRR-A-032-WIS; 07525,; A-020-WIS(1) | |||||||||||
Stock Number | PB-208 696 | |||||||||||
Additional Subjects | ( Limnology ; Heat) ; ( Water pollution ; Heat) ; ( Nutrients ; Limnology) ; Lakes ; Aquatic plants ; Biochemical oxygen demand ; Stratification ; Temperature gradients ; Ph ; Diurnal variations ; Fishes ; Thermal pollution ; Water pollution effects(Animals) ; Water pollution effects(Plants) | |||||||||||
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Collation | 46p | |||||||||||
Abstract | Physical, chemical, and biological differences between two similar ponds were studied. One pond was heated to 5 C above ambient temperature, while the other served as a reference. Two hundred and fifty green sunfish, Lepomis cyanellus, were planted in each pond. The young-of-the-year grew at a higher rate in the heated pond. The heated pond permitted Chara to grow year round at an accelerated rate. It produced more oxygen during the day and lost more oxygen during the night than did the reference pond. The latter showed greater annual fluctuations of total alkalinity and conductivity. There was an indication that the synergistic effect of temperature and oxygen with an unlimited food supply will promote fish growth. (Author) |