Canadian Contribution to the International Biological Programme No. 103.
Version of Record online: 28 JUN 2008
Journal of Phycology
Volume 7, Issue 3, pages 239–249, September 1971
How to Cite
Gruendling, G. K. (1971), ECOLOGY OF THE EPIPELIC ALGAL COMMUNITIES IN MARION LAKE, BRITISH COLUMBIA. Journal of Phycology, 7: 239–249. doi: 10.1111/j.1529-8817.1971.tb01509.x
Received February 16, 1971; revised June 8, 1971.
I express my gratitude to Dr. Ian E. Efford, Director of the Canadian I.B.P. Marion Lake Project at the University of British Columbia, for his support of the research and for reviewing the manuscript, and to Drs. Ronald Davies, Bary Hargrave, Michael Winterbourne, and Mohan Wali for valuable discussion and technical aid during the study. This study was supported by funds provided by the National Research Council of Canada. Much of the work was done during the tenure of a National Research Council of Canada Postdoctoral Fellowship at the University of British Columbia.
- Issue online: 28 JUN 2008
- Version of Record online: 28 JUN 2008
Studies of the seasonal and spatial distribution of the epipelic algal standing crop and primary productivity were conducted in Marion Lake, British Columbia. Possible biological, chemical, and physical factors controlling the epipelic algal community dynamics were also investigated. The epipelic algal flora of the lake was very diverse, however, it can be generally considered as acidophilic associations of algae. The vertical distribution of the epipelic algae is partially influenced by the amount of light reaching the sediment, but also strongly influenced by the grazing of animals and erosion by wave action. Temperature, light, and grazing by animals all appear to influence the seasonal fluctuations in the algal standing crop. Concentrations of nutrients immediately above the sediment surface appear to be less important as controlling factors. The most important variables influenceing the primary productivity of the epipelic community are temperature, total algal standing crop, and light. Nutrients, again, appear to be less important as controlling factors. The study supports the idea that epipelic algal growth is high in shallow, low nutrient lakes and that the epipelic algal productivity is extremely important to the total energy budget of the lake.