THE LIMNOLOGY OF AMETHYST LAKE, A HIGH ALPINE TYPE NEAR JASPER, ALBERTA
1953; NRC Research Press; Volume: 31; Issue: 3 Linguagem: Inglês
10.1139/z53-018
ISSN1480-3283
Autores Tópico(s)Aquatic Invertebrate Ecology and Behavior
ResumoAmethyst, at an altitude of 1965 m. (6450 ft.), is one of the few lakes in the Canadian Rockies investigated limnologically. The annual ice cover persists for nearly eight months, and the highest mean lake temperature is about 10° C. The water is clear, low in mineral content, and well oxygenated. Plankton and bottom organisms are of few species and present in quantities within the lowest range for oligotrophic lakes. The lake appears to be typically alpine oligotrophic, of a group characterized by some European workers as panoligotrophic. The only fish present is the rainbow trout, introduced in 1931. They grew rapidly, then deteriorated, and later made a slow recovery. The third generation has lost some of the characteristics of the parent stock Salmo gairdnerii kamloops, and begins to resemble the high mountain subspecies S.g. whitehousei.
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