Some ecological effects of artificial circulation on the phytoplankton

Studies were carried out in Mutek lake over several years, to determine the effect of artificial aeration and destratification on the biomass of phytoplankton; a description of the lake is given and the aeration regime is described. Low intensity mixing by introduction of compressed air into the dee...

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Bibliographic Details
Published in:Hydrobiologia 1985-01, Vol.122 (1), p.89-96
Main Author: RYBAK, M
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Synecology
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Summary:Studies were carried out in Mutek lake over several years, to determine the effect of artificial aeration and destratification on the biomass of phytoplankton; a description of the lake is given and the aeration regime is described. Low intensity mixing by introduction of compressed air into the deep water layers increased the biomass of phytoplankton considerably, most of this increase being due to development of Ceratium hirudinella. However, when a more efficient air compressor was used, giving more intensive mixing, algal development was inhibited and the biomass became similar to that observed during a control year before aeration was begun. Artificial destratification also caused changes in community structure, seasonal succession of the algae, and physiological state of the phytoplankton, and stimulated development of phytoplankton with a relatively high specific weight. Some aspects of the use of direct aeration as a method of lake restoration are discussed.
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00018963