Abstract
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1.
The epipelic algal standing crops were increased by the discharge of thermal effluent into Lake Wabamun, particularly in the discharge canal at station (03–04) and 05.
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2.
The increase in the standing crop size of the epipelon was due to Oscillatoria amoena and O. borneti in the heated area, while the discharge canal provided the inoculum of the algae for the heated area of the lake.
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3.
At station (03–04) the increased standing crop size was also a function of increased light penetration to the sediment due to the heated effluent keeping an area of the lake free of ice during the winter.
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4.
The species composition of the diatoms was similar at all stations except in the discharge canal where there was a reduction in the number of diatom species.
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5
Navicula cuspidate developed best in the discharge canal in the summer where water temperatures of 31°C were recorded.
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6.
Amphora ovalis var. pediculus was the dominant diatom species during the winter under ice-cover.
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7.
The heated effluent had no effect upon the standing crop or species composition of the epipsammon.
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8.
Results obtained from the sediment core study showed that the shallow littoral zone of the lake is very disturbed due to wind-induced wave action.
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Hickman, M. Effects of the discharge of thermal effluent from a power station on Lake Wabamun, Alberta, Canada — The epipelic and epipsamic algal communities. Hydrobiologia 45, 199–215 (1974). https://doi.org/10.1007/BF00014002
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DOI: https://doi.org/10.1007/BF00014002