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The 25 site locations in the Mackenzie Valley region of Canada's Northwest Territories are depicted with respect to the Ecoclimatic Classification (left) and Permafrost Zone (right), where the Ecoclimatic Classification is derived from the Ecoregions Working Group (1989) and the original permafrost map data was provided by The Atlas of Canada http://atlas.gc.ca/ © 2007, and was produced under licence from Her Majesty the Queen in Right of Canada, with permission of Natural Resources Canada.
Source publication
With permafrost distribution controlled largely by topography and climate, this study examines the influence of climate and permafrost conditions on standing tree biomass along a climatic gradient extending from the Mid-Boreal Ecoclimatic Region in the southern Northwest Territories to the High Subarctic environments near the arctic tree line at In...
Contexts in source publication
Context 1
... complex interactions between northern peatland soils, vegetation, and permafrost, a thorough understanding of forest and peatland ecology is required in order to predict climate change responses in these sensitive northern landscapes. In northwestern Canada, the Mackenzie Valley presents a unique opportunity to study tree biomass in a region rich in peat deposits, spanning a climatic gradient of 6ºC mean annual temperature and 121 mm mean annual precipitation (Environment Canada 2002), in what is predicted to be one of the most sensitive areas to climate warming in Canada ( Kettles and Tarnocai 1999 Discontinuous, and Continuous Permafrost Zones replacing each other from south to north, underlying 10- 50%, 50-90%, and 90-100% of the terrain, respectively (Figure 1). Ecological classifications of the region also reflect this north to south variability, while incorporating influences of the large-scale topography. ...
Context 2
... classifications of the region also reflect this north to south variability, while incorporating influences of the large-scale topography. A prime example is the Ecoclimatic Regions of Canada (Ecoregions Working Group 1989) which delineate the Mid Boreal, High Boreal, Low Subarctic and High Subarctic ecoclimatic regions within the Mackenzie Valley (Figure 1). . Each plot was laid out as a 20 x 20 m square, with standard mensuration data recorded within fixed plot areas. ...
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