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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 .
The elevation where trees fail to grow is called the tree line. The biotemperature of the subalpine zone is between 3 and 6 °C (37 and 43 °F). [5] Above the tree line the ecosystem is called the alpine zone or alpine tundra, dominated by grasses and low-growing shrubs. The biotemperature of the alpine zone is between 1.5 and 3 °C (34.7 and ...
Because the island is young and isolated from larger land masses, species biodiversity is relatively low. Forest cover has been reduced to about 1% of the original birch forest by a long history of timber extraction and soil erosion caused by sheep grazing. Blanket bogs (areas of high rainfall and peat accumulation) are common. [1] [2] [3] [4]
The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. The tundra soil is rich in nitrogen and phosphorus . [ 2 ] The soil also contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide in the permafrost , making the tundra soil a ...
Ogilvie–MacKenzie alpine tundra: Canada, United States: Pacific Coastal Mountain icefields and tundra: Canada United States: Torngat Mountain tundra: Canada: Palearctic realm; Arctic desert: Russia: Bering tundra: Russia: Cherskii–Kolyma mountain tundra: Russia: Chukchi Peninsula tundra: Russia: Kamchatka Mountain tundra and forest tundra ...
The term tundra comes through Russian тундра from the Kildin Sami word tūndâr "uplands," "treeless mountain tract." [15] There are three types of tundra: Arctic tundra, [16] alpine tundra, [16] and Antarctic tundra [17] In tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. Scattered trees grow ...
Terrestrial Global 200 ecoregions in Europe comprise three regions of Scandia alpine tundra and taiga, which is present in Finland, Norway, Russia and Sweden: PA0608 Scandinavian and Russian taiga; PA1106 Kola Peninsula tundra; PA1110 Scandinavian montane birch forest and grasslands; Other Global 200 ecoregions:
Alpine plants occur in a tundra: a type of natural region or biome that does not contain trees. Alpine tundra occurs in mountains worldwide. Alpine tundra occurs in mountains worldwide. It transitions to subalpine forests below the tree line; stunted forests occurring at the forest-tundra ecotone are known as Krummholz .