Hydrobiologia

, Volume 87, Issue 1, pp 21–32 | Cite as

The removal of a heated water discharge from a lake and the effect upon an epiphytic algal community

  • M. Hickman
Article

Abstract

The effects of the removal of a heated water discharge from Lake Wabamun, Alberta (longitudes 114°26′ and 114°44′W; latitudes 53°30′ and 53°35′N) upon epiphytic algae has been documented. Due to the timing of the cessation of flow the first year without elevated temperatures was one of transition. Standing crops returned to normal lake levels the following year. Species composition changes occurred, and species such as Epithemia turgida, Amphipleura pellucida, Nitzschia fonticola, Rhopalodia gibba, Rivularia haematites, and Scytonema alatum, all of which were detrimentally affected by the elevated temperatures, returned to the previously affected area, while species such as Oedogonium sp., Spirogyra sp. and Cladophora glomerata, dominant at times in the heated area, diminished in importance. The ability of Cocconeis placentula to grow at low light intensities (15–110 µEinsteins m−2 s−1) was again demonstrated.

Keywords

heated effluent removal epiphytic algae 

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Copyright information

© Dr W. Junk Publishers 1982

Authors and Affiliations

  • M. Hickman
    • 1
  1. 1.Department of BotanyUniversity of AlbertaEdmontonCanada

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