. The Canadian field-naturalist. 1971 Larsen: Vegetation of Fort Reliance 153 contained in limestone rocks and because of unfavorable climatic conditions prevailing. Black spruce, however, would occupy the ter- rain if the climate permitted, since it is not as demanding in terms of nutrient requirements, but the climate northward is also inimical to black spruce survival over major portions of the landscape. Only in protected areas of favorable microclimate does spruce manage to survive to the north of the forest border on Artillery Lake. The most reasonable interpre- tation of the black spruc
. The Canadian field-naturalist. 1971 Larsen: Vegetation of Fort Reliance 153 contained in limestone rocks and because of unfavorable climatic conditions prevailing. Black spruce, however, would occupy the ter- rain if the climate permitted, since it is not as demanding in terms of nutrient requirements, but the climate northward is also inimical to black spruce survival over major portions of the landscape. Only in protected areas of favorable microclimate does spruce manage to survive to the north of the forest border on Artillery Lake. The most reasonable interpre- tation of the black spruce outliers north of Artillery Lake is that they are relict stands from a former time when the entire area was forested. This view is supported by evidence that forest once extended farther north in the En- nadai Lake area (Larsen 1965; Bryson, Irving, and Larsen 1965). It is of interest that char- coal underlain by a fossil podzol has also been found by the author in a favorable site near the north end of Artillery Lake. The C* date of this charcoal layer is 2140 ± 80 years BP (Bender et al 1967). In addition, W. C. Noble (pers. comm.) discovered a buried charred soil horizon at Winter Lake on the Snare River system (64°28'15'' N; 113°06' W). Here the exposed soil horizon of black humus and charred spruce wood lay beneath 33 inches of aeolean sands capped by present stable vegeta-. Figure 2b. Outlet of the Lockhart River at the south end of Artillery Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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