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Tundra exploration vehicles used for oil development and polar bear tours ("an eco-friendly" industry) leave traces of tire marks for 20-plus years after a disturbance occurs. Other factors such as high CO 2 emissions from tourism and from warming tundra soil, create a positive feedback loop, accelerating changes to the tundra.
The ecoregion has very little human habitation, and most of the non-ice terrain is moss and lichen cover. The region supports viable populations of arctic mammals such as muskox, arctic wolves, arctic foxes, arctic hares, polar bears, and caribou. [2] [4] [5] [6]
"Level III" subdivides those regions again into 182 ecoregions. [1] [2] "Level IV" is a further subdivision of Level III ecoregions. Level IV mapping is still underway but is complete across most of the United States. For an example of Level IV data, see List of ecoregions in Oregon and the associated articles.
The ecoregion to the north is the 'High Arctic tundra' (colder and wetter), to the south is the Low Arctic tundra (warmer and wetter). [2] The bedrock under the western extent is Paleozoic and Mesozoic sedimentary rock with a relatively flat cover of glacial moraines and marine deposits.
Polar ecology is the relationship between plants and animals in a polar environment. Polar environments are in the Arctic and Antarctic regions. Arctic regions are in the Northern Hemisphere , and it contains land and the islands that surrounds it.
Other mammals include lemmings, polar bear, walrus, beluga whale, snowshoe hare and Arctic hare, red fox, grey wolf, Arctic ground squirrel and seals. The coast is also home to many breeding waterbirds including snow goose, spectacled eider, Steller's eider, king eider, red-throated loon, [3] pacific loon, [4] and yellow-billed loon.
For the most part, the large carnivores are the dominant species in the ecoregion, mainly the polar bear. It is the keystone species for the area due to many of its habits, including its diet and hunting strategies. In addition, the life history of the 22,000 polar bears in the Arctic clearly defines its current existence in the Arctic Cordillera.
Arctic fox, polar bear, caribou% [1] The Canadian Arctic tundra is a biogeographic designation for Northern Canada 's terrain generally lying north of the tree line or boreal forest , [ 2 ] [ 3 ] [ 4 ] that corresponds with the Scandinavian Alpine tundra to the east and the Siberian Arctic tundra to the west inside the circumpolar tundra belt ...