Bottom-fast ice delineation with PolSAR and InSAR techniques in the Mackenzie Delta region, Northwest Territories, Canada

2013 ◽  
Vol 39 (4) ◽  
pp. 341-353 ◽  
Author(s):  
Bing Yue ◽  
Joseph Chamberland ◽  
John Mulvie
Keyword(s):  
Northwest Territories ◽  
Mackenzie Delta ◽  
Delta Region ◽  
Fast Ice

Reindeer herding as private enterprise in Canada

Polar Record ◽  
1984 ◽  
Vol 22 (137) ◽  
pp. 127-136 ◽  
Author(s):  
J. K. Stager
Keyword(s):  
Northwest Territories ◽  
Private Enterprise ◽  
Private Ownership ◽  
Mackenzie Delta ◽  
Reindeer Herding ◽  
Delta Region ◽  
Management Decisions ◽  
Management Techniques ◽  
Government Management ◽  
Canadian Wildlife

AbstractAfter unsuccessful introductions of reindeer into Canada during the early decades of this century, a herd brought from Alaska in 1935 was maintained successfully under government management (latterly under the Canadian Wildlife Service) for almost 40 years in the Mackenzie Delta region, Northwest Territories. Sold in 1974 into private ownership, the herd has since increased substantially in size; new management techniques have been developed to herd, handle and slaughter the animals. Meat, antlers in velvet and skins are the main products of a small but profitable local industry under native ownership. Currently numbering some 16 000 animals, the herd now justifies new management decisions affecting its future size and the scope of the enterprise.

scholarly journals Vegetation of the Continental Northwest Territories at 6 ka BP

2007 ◽  
Vol 49 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Glen M. MacDonald
Keyword(s):  
Northwest Territories ◽  
Populus Tremuloides ◽  
Picea Mariana ◽  
Picea Glauca ◽  
Pinus Banksiana ◽  
Arctic Tundra ◽  
Range Limits ◽  
Mackenzie Delta ◽  
Delta Region ◽  
Low Arctic

ABSTRACTPollen records are used to reconstruct vegetation in the continental Northwest Territories at 6 ka (6000 14C yr BP). Picea glauca, P mariana, Larix laricina, Populus tremuloides, P. balsamifera, Alnus crispa and A. incana were present throughout their modern ranges in the Boreal and Subarctic Forest Zones by 6000 BP. Pinus banksiana, however, had not yet reached its present northern limits. Population densities of the dominant trees, Picea glauca and Picea mariana, were close to, or as high as, present. In the Mackenzie Delta region the range limit of Picea glauca was approximately 25 km north of its modern location just prior to 6000 BP. In contrast, the northern limits of the forest in central Canada were similar to present. The tundra vegetation close to the edge of the forest was similar to modern Low Arctic Tundra. Development of extensive Sphagnum peatlands had begun in the forested areas and the adjacent Low Arctic Tundra. Palaeoecological information regarding vegetation at 6000 BP remains lacking for the northeastern half of the study area. Therefore, the nature of the vegetation in much of the area now occupied by Low Arctic and Middle Arctic Tundra remains unknown. Important vegetation changes that occurred following 6 ka include : (1) the advance of Pinus banksiana to its present northern range limits, (2) the retreat of the northern range limits of Picea glauca in the Mackenzie Delta region between 6000 and 3500 BP and (3) the rapid and marked increase in the population density of Picea mariana in the treeline zone of the central Northwest Territories at 5000 BP followed by a decline at 4000 BP.

Spatial Heterogeneity in the Shrub Tundra Ecotone in the Mackenzie Delta Region, Northwest Territories: Implications for Arctic Environmental Change

Ecosystems ◽  
2010 ◽  
Vol 13 (2) ◽  
pp. 194-204 ◽  
Author(s):  
Trevor C. Lantz ◽  
Sarah E. Gergel ◽  
Steven V. Kokelj
Keyword(s):  
Environmental Change ◽  
Spatial Heterogeneity ◽  
Northwest Territories ◽  
Mackenzie Delta ◽  
Delta Region ◽  
Shrub Tundra

The Small Mammals of the Mackenzie Delta Region, Northwest Territories, Canada

ARCTIC ◽  
1978 ◽  
Vol 31 (4) ◽  
Author(s):  
Arthur M. Martell ◽  
Arthur M. Pearson
Keyword(s):  
Northwest Territories ◽  
Small Mammals ◽  
Mackenzie Delta ◽  
Delta Region

The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada

2005 ◽  
Vol 16 (4) ◽  
pp. 343-353 ◽  
Author(s):  
S. V. Kokelj ◽  
R. E. Jenkins ◽  
D. Milburn ◽  
C. R. Burn ◽  
N. Snow
Keyword(s):  
Water Quality ◽  
Northwest Territories ◽  
Mackenzie Delta ◽  
Delta Region

Brown Bear (Ursus arctos) Predation of Broad Whitefish (Coregonus nasus) in the Mackenzie Delta Region, Northwest Territories

ARCTIC ◽  
2009 ◽  
Vol 62 (3) ◽  
Author(s):  
Oliver E. Barker ◽  
Andrew E. Derocher
Keyword(s):  
Northwest Territories ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Mackenzie Delta ◽  
Delta Region

Geochemistry of the active layer and near-surface permafrost, Mackenzie delta region, Northwest Territories, Canada

2005 ◽  
Vol 42 (1) ◽  
pp. 37-48 ◽  
Author(s):  
S V Kokelj ◽  
C R Burn
Keyword(s):  
Northwest Territories ◽  
Active Layer ◽  
Permafrost Soil ◽  
Mackenzie Delta ◽  
Delta Region ◽  
Ion Content ◽  
Near Surface ◽  
Fine Grained ◽  
Permafrost Table ◽  
Soluble Ion

The soluble ion content of the active layer and near-surface permafrost was determined at 41 sites in the Mackenzie delta region, Northwest Territories, Canada. In delta soils, Ca2+ and Mg2+ are the dominant soluble cations, but the quantity and relative abundance of Na+ increase with proximity to the Beaufort Sea coast. Soils beneath frequently flooded surfaces are ion rich in comparison with ground above the level of decadal flooding. Within a terrain type, near-surface permafrost soil solute concentrations are similar between paired cores spaced <1 m apart, but at greater distances (cores spaced 3–13 m apart), solute concentrations are significantly different. Comparatively low soil solute concentrations in old upland surfaces near Inuvik may be a result of progressive removal of soluble materials from the active layer and permafrost during periods of deeper thaw. In sandy silt alluvium, solutes excluded during downward freezing may accumulate at the base of the active layer and be sequestered by a rising permafrost table. At sites with finer grained clayey silts, the correspondence between zones of ice and cation enrichment indicates coupled movement of water and solutes during freeze-back of the active layer and development of aggradational ice. Solute enrichment of near-surface permafrost is greatest at fine-grained ice-rich alluvial sites, where mean concentrations in permafrost are up to 7.5 times greater than those in the active layer.

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