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The transition from forest to tundra, commonly called treeline, is expected to advance, particularly in northern latitudes. Treeline in two subarctic locales: the western Mackenzie Mountains, Northwest Territories, and the western Hudson Bay Lowlands southeast of Churchill, Manitoba were studied, with the objectives of determining: (i) the historical and current characteristics of the trees at altitudinal and latitudinal treelines, and; (ii) what factors contributed most to the configuration of treeline at its altitudinal and latitudinal limits. Five investigations were undertaken, each employing different methods in order to assess several variables, theorized to be key drivers of pattern and process at treeline....
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