of the Mackenzie Lowlands and the tree line, the terrain changes to that of the ancient and rocky Precambrian mass known as the Canadian Shield, the western edge of which is straddled by the two largest. However, high production costs and transportation problems inhibit the development of many of the territories mineral resources, including the petroleum and natural gas fields that exist in the western Arctic coastal regions. Attempts to introduce domestic reindeer and other domesticated animals have not been successful. Retrieved February 22, 2011. Northwest Territories Crossword, money. Economy The economy of the territories depends on the exploitation of natural resources. 47 However, as production at the current mines started to wind down, no new mines opened and the public service shrank, the territory lost 1,200 jobs between November 2013 and November 2014. No resident administrative authorities were established within the present limits of the Northwest Territories until the 20th century. Legislative Assembly of the Northwest Territories. No reservations were established, but a substantial number of small indigenous settlements have the same status as reservations elsewhere. Concentrated in the Mackenzie valley area, the Dene belong to several tribes, all part of the Athabaskan language family. 21 22 Manitoba, Ontario, and Quebec acquired the last addition to their modern landmass from the Northwest Territories in 1912. Bird life is plentiful in summer, with some species, notably ptarmigans and ravens, remaining all winter. A b "Population by year of Canada of Canada and territories". Extremes are common with summer highs in the south reaching 36 C (97 F) and lows reaching into the negatives. Thereafter, the exchange of furs for imported goods became the basis of the Dene economy. According to the Oxford Guide to Canadian English Usage ( isbn ;. This immense region comprised all of today's Canada except that which was encompassed within the early signers of Canadian Confederation, that is, British Columbia, early forms of present-day Ontario and Quebec (which encompassed the coast of the Great Lakes. "Western Arctic to Northwest Territories: MP calls for riding name change". Ecological Regions of the Northwest Territories Taiga Plains permanent dead link. This group is composed of one member elected from each of the nineteen constituencies. Berger, a Canadian Supreme Court justice, into a proposed Mackenzie valley natural gas pipeline led to increased public concern over environmental issues in the region and recognition of aboriginal land claims and other rights. All legislation is technically subject to the assent of the commissioner, but the commissioners role is mainly ceremonial. Tourism is an important portion of the service sector; adventure tours, driving tours, sportfishing, hunting, and such natural phenomena as the aurora borealis and long summer days attract visitors from other parts of Canada, Japan, and the United States. Permafrost is evident in many parts of the Northwest Territories, as many large portions of land and water have been frozen for years.