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Animal species that are endangered in the tundra include the Arctic fox, caribou, and polar bears. These animals have been endangered due to overhunting, an infestation of disease, loss of diet and habitat due to climate change, and human destructive activities, such as searches for natural gas and oil, mining, and road building. [ 10 ]
In physical geography, tundra (/ ˈ t ʌ n d r ə, ˈ t ʊ n-/) is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. There are three regions and associated types of tundra: Arctic tundra, [2] alpine tundra, [2] and Antarctic tundra.
These regions are generally above 65% in latitude (north or south), are characterized by expanses of ice and bare ground, and little animal life. [5] [6] The mean annual temperature is −11.5 °C (11.3 °F). Mean annual precipitation is 400–600 mm/year. [4]
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The coastal regions, up to an altitude of about 50 m, are generally covered with low herbaceous vegetation, and are classified as tundra. Higher up, rocky ground dominates and the vegetation is rarer, limited to scattered tufts and mosses and lichens. There are no trees or shrubs on the islands. This was not always the case, however.
Mammals absent from the tundra before the Beringia land bridge but widespread in other parts of North Canada are the boreal woodland caribou (Rangifer tarandus), Arctic wolf (Canis lupus arctos) and ermine or stoat (Mustela ermine). Approximately, 3 million caribou are found in the Canadian Arctic. There is a dynamic relationship between the ...
The catkins grow before the leaves appear in the spring. [1] The leaves are green above and whitish underneath, and hairless. [4] This plant is a dominant species on the tundra in many areas. It commonly grows with sedges. It may form thickets with other species of willow along waterways and on floodplains.