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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, [2] Alpine, [2] and Antarctic. [3] Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens ...
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]
The steppe-tundra biome first emerged during the glacial period of Marine Isotope Stage 12, around 460,000 years ago, during the Middle Pleistocene, uniting animals that previously inhabited the previously disparate northern tundra and Central Asian steppe biomes. The size of the steppe-tundra biome would repeatedly expand and contract as a ...
Reindeer live in the Arctic tundra (a frigid treeless plain) and the northern boreal woodlands that border the tundra. This type of biome is found in Alaska, Canada’s Northern Coast and islands ...
Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation, with an associated harsh climate. As the latitude of a location approaches the poles, the threshold elevation for alpine tundra gets lower until it reaches sea level, and alpine tundra merges with polar tundra .
Reindeer also travel, feed, and rest together in the wild, sometimes forming super-herds of up to 500,000 animals. Tundra reindeer migrate between forest and tundra in these massive groups in an ...
Mount Elbert rises through multiple biotic zones, with alpine tundra at its peak.. The Rocky Mountains range in latitude between the Liard River in British Columbia (at 59° N) and the Rio Grande in New Mexico (at 35° N), and in height up to the highest peak, Mount Elbert at 14,440 feet (4,400 m), taking in great valleys such as the Rocky Mountain Trench and San Luis Valley.
Animals of the area include large brown bears of Denali National Park and the southwestern coast near Iliamna Lake and Kamishak Bay. Other mammals include mountain goat, caribou, moose, Dall sheep, North American beaver and snowshoe hare. The rivers of the area are home to salmon.