High Arctic tundra

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Canadian High Arctic tundra
Truelove Lowlands Devon Island.jpg
Truelove Lowlands, Devon Island
High Arctic tundra map.svg
Ecoregion territory (in green)
Ecology
Realm Neoarctic
Biome Tundra
Borders
Bird species44 [1]
Mammal species10 [1]
Geography
Area464,788 km2 (179,456 sq mi)
Country Canada
Territories Northwest Territories and Nunavut
Coordinates 75°15′N89°45′W / 75.25°N 89.75°W / 75.25; -89.75
Climate type Polar
Conservation
Conservation status Relatively Stable/Intact [2]
Habitat loss0% [1]
Protected9.9% [1]

The Canadian High Arctic Tundra ecoregion encompasses most of the northern Arctic archipelago, from much of Baffin Island, Somerset Island, and Prince of Wales Island in the south, through all islands northward to the most northern island in Canada, Ellesmere Island. [3] Much of the northern islands are covered in ice, and the climate is very dry with as little as 50 mm/year in places. 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]

Contents

Location and description

The main Queen Elizabeth Islands are Ellesmere Island, Axel Heiberg Island, Devon Island, Ellef Ringnes Island, Somerset Island, Prince Patrick Island, and Melville Island. The maximum elevation is 1,633 metres (5,358 ft). The ecoregion to the north on Baffin Island is the Davis Highlands tundra, which receives more than twice as much precipitation (400-600 mm/year). [6]

The terrain varies across the ecoregion. The north and west is mountainous and heavily covered in ice. To the south and east the covered portions of Somerset and Baffin Islands are lowland plains with glacial moraines. The ocean around the northern islands tends to be iced over even through the summer, while there is open water in the summer around the southern islands. On land, permafrost is continuous and deep. [6]

Climate

The climate of the ecoregion is Tundra climate (Köppen climate classification ET), a local climate in which at least one month has an average temperature high enough to melt snow (0 °C (32 °F)), but no month with an average temperature in excess of 10 °C (50 °F). [7] [8]

Flora and fauna

While much of the ecoregion is ice or bare rock with very sparse vegetation, up to 68 percent of the cover is moss and lichen. A further 6% of the land, supports herbaceous cover. [5] In the north, only the hardiest cold-tolerant vascular plants can survive, such as sedge (Carex) and cotton grass (Eriophorum). In a few low-lying, protected areas there can be small stands of Arctic willow ( Salix arctica ), Dryas species, and low-growing purple saxifrage ( Saxifraga oppositifolia ), Kobresia species and arctic poppy ( Papaver radicatum ). In the south with a marginally relatively milder and wetter climate, the landscape may also feature stands of wood rush ( Luzula ) and wire rush ( Juncus ). [6]

Mammals in the ecoregion include muskox ( Ovibos moschatus ), arctic hare ( Lepus arcticus ), arctic fox ( Alopex lagopus ), caribou ( Rangifer tarandus'), Polar bears ( Ursus maritimus ), and high Arctic wolves ( Canis lupus arctos ). [6]

Protected areas

Over 10% of the ecoregion is officially protected. [5] These protected areas include:

See also

Related Research Articles

<span class="mw-page-title-main">Ellesmere Island</span> Island of the Arctic Archipelago in Nunavut, Canada

Ellesmere Island is Canada's northernmost and third largest island, and the tenth largest in the world. It comprises an area of 196,236 km2 (75,767 sq mi), slightly smaller than Great Britain, and the total length of the island is 830 km (520 mi).

<span class="mw-page-title-main">Arctic wolf</span> Subspecies of carnivore

The Arctic wolf, also known as the white wolf, polar wolf, and the Arctic grey wolf, is a subspecies of grey wolf native to the High Arctic tundra of Canada's Queen Elizabeth Islands, from Melville Island to Ellesmere Island. Unlike some populations that move between tundra and forest regions, Arctic wolves spend their entire lives north of the northern treeline. Their distribution to south is limited to the northern fringes of the Middle Arctic tundra on the southern half of Prince of Wales and Somerset Islands. It is a medium-sized subspecies, distinguished from the northwestern wolf by its smaller size, its whiter colouration, its narrower braincase, and larger carnassials. Since 1930, there has been a progressive reduction in size in Arctic wolf skulls, which is likely the result of wolf-dog hybridization.

<span class="mw-page-title-main">Torngat Mountains</span> Mountain range in eastern Canada

The Torngat Mountains are a mountain range on the Labrador Peninsula at the northern tip of Newfoundland and Labrador and eastern Quebec. They are part of the Arctic Cordillera. The mountains form a peninsula that separates Ungava Bay from the Atlantic Ocean.

<span class="mw-page-title-main">British Columbia mainland coastal forests</span> Temperate coniferous forest ecoregion in British Columbia, Canada and Washington, United States

British Columbia mainland coastal forests is a temperate coniferous forest ecoregion the Pacific coast of North America, as defined by the World Wildlife Fund (WWF) categorization system.

<span class="mw-page-title-main">Arctic Cordillera</span> Terrestrial ecozone in northern Canada

The Arctic Cordillera is a terrestrial ecozone in northern Canada characterized by a vast, deeply dissected chain of mountain ranges extending along the northeastern flank of the Canadian Arctic Archipelago from Ellesmere Island to the northeasternmost part of the Labrador Peninsula in northern Labrador and northern Quebec, Canada. It spans most of the eastern coast of Nunavut with high glaciated peaks rising through ice fields and some of Canada's largest ice caps, including the Penny Ice Cap on Baffin Island. It is bounded to the east by Baffin Bay, Davis Strait and the Labrador Sea while its northern portion is bounded by the Arctic Ocean.

<span class="mw-page-title-main">Arctic coastal tundra</span> Tundra ecoregion of Canada and the United States

The Arctic coastal tundra is an ecoregion of the far north of North America, an important breeding ground for a great deal of wildlife.

<span class="mw-page-title-main">Baffin coastal tundra</span> Tundra ecoregion of Nunavut, Canada

The Baffin coastal tundra is a small ecoregion of the far north of North America, on the central north coast of Baffin Island in the Canadian territory of Nunavut. This is permafrost tundra with an average annual temperature below freezing.

<span class="mw-page-title-main">Northern Canadian Shield taiga</span> Taiga ecoregion in Canada

Northern Canadian Shield taiga is a taiga ecoregion located in northern Canada, stretching from Great Bear Lake in the Northwest Territories to Hudson Bay in eastern Nunavut. The region supports conifer forests to its northern edge, where the territory grades into tundra. The open forest in this transition zone is characterized by widely scattered, stunted stands of black spruce and tamarack, with some white spruce. The ecoregion lies over the northwestern extent of the Canadian Shield.

<span class="mw-page-title-main">Canadian Arctic tundra</span>

The Canadian Arctic tundra is a biogeographic designation for Northern Canada's terrain generally lying north of the tree line or boreal forest, that corresponds with the Scandinavian Alpine tundra to the east and the Siberian Arctic tundra to the west inside the circumpolar tundra belt of the Northern Hemisphere.

<span class="mw-page-title-main">Arctic desert</span> Ecoregion in Arctic Ocean

The Arctic desert ecoregion is a terrestrial ecoregion that covers the island groups of Svalbard, Franz Josef Land, Severny Island and Severnaya Zemlya in the Arctic Ocean, above 75 degrees north latitude. The region is covered with glaciers, snow, and bare rock in a harshly cold environment. The temperature does rise above freezing for short periods in the summer, so some ice melt occurs, and the area supports colonies of sea birds and mammals. It has an area of 161,400 square kilometres (62,300 sq mi).

<span class="mw-page-title-main">Southern Hudson Bay taiga</span> Taiga ecoregion of Canada

The Southern Hudson Bay taiga is a terrestrial ecoregion, as classified by the World Wildlife Fund, which extends along the southern coast of Hudson Bay and resides within the larger taiga biome. The region is nearly coterminous with the Hudson Plain, a Level I ecoregion of North America as designated by the Commission for Environmental Cooperation (CEC) in its North American Environmental Atlas.

<span class="mw-page-title-main">Iceland boreal birch forests and alpine tundra</span> Ecoregion that covers the island of Iceland

The Iceland boreal birch forests and alpine tundra ecoregion covers the island of Iceland in the North Atlantic. The island is volcanic in origin with basaltic soils, and the cold northerly climate prevents any significant crop agriculture. 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 are common.

<span class="mw-page-title-main">Davis Highlands tundra</span> Tundra ecoregion of Nunavut, Canada

The Davis Highlands tundra ecoregion covers the Baffin Mountains on the northeast coast of Baffin Island and Bylot Island, facing Baffin Bay in Nunavut, northern Canada. The terrain is extremely rugged, heavily glaciated, with many deep fjords, and very cold. About half of the territory is moss and lichen tundra, the other half bare rock and ice. The region is wetter than the much drier regions to the southwest of the Baffin Islands.

<span class="mw-page-title-main">Kalaallit Nunaat high arctic tundra</span> Ecoregion in northeastern Greenland

The Kalaallit Nunaat high arctic tundra ecoregion covers the coastal areas of northern including the upper half of the west coast and the upper one-third of the east coast. Greenland. Areas inland of this strip of land are either covered in ice or bare rock. About one-third of the region is covered by mosses and lichens, and another 3% by herbaceous vegetation and shrubs. The largest national park in the world, Northeast Greenland National Park, protects a majority of the land within the ecoregion. The Pituffik Space Base is also located in this ecoregion.

<span class="mw-page-title-main">Kalaallit Nunaat Arctic Steppe</span>

The Kalaallit Nunaat Arctic Steppe ecoregion covers the low coastal areas of western and southern Greenland, reaching in up to 100 km before bare rock and ice become dominant. While much of the ecoregion is bare rock or ice, about 50% of the ground is covered in moss and lichen, and another 10% in herbaceous cover, shrubs, and even small stands of trees.

<span class="mw-page-title-main">Low Arctic tundra</span> Tundra ecoregion of Canada

The Canadian Low Arctic Tundra ecoregion covers a rolling landscape of shrubby tundra vegetation along the northern edge of the mainland Canada along the border of the Northwest Territories and Nunavut, and a small portion in Quebec on the northeast coast of Hudson Bay. The region is important for large herds of caribou and other large mammals, and for large nesting colonies of birds such as snow geese. The region is mostly intact, with 95% remaining intact.

<span class="mw-page-title-main">Middle Arctic tundra</span> Tundra ecoregion of Canada

The Canadian Middle Arctic Tundra ecoregion covers a broad stretch of northern Canada - the southern islands of the Arctic Archipelago, plus the northern mainland of Nunavut and, across Hudson Bay to the east, a portion of northern Quebec. This is the coldest and driest ecoregion in Canada, and can be referred to as a 'polar desert'. It is an important region for breeding and migratory birds, and supports 80% of the world's muskox.

<span class="mw-page-title-main">Ogilvie–MacKenzie alpine tundra</span> Tundra ecoregion of Canada and the United States

The Ogilvie–MacKenzie alpine tundra ecoregion covers the mountainous middle of the Yukon Territory in Canada, with extensions into the Northwest Territories. The vegetation is alpine and subalpine open forest of stunted spruce, fir and pine. The area is rugged but sections appear to have been unglaciated in the late Pleistocene and there are therefore relic species in the region. The area is remote and supports large, sustainable predator-prey systems.

<span class="mw-page-title-main">Torngat Mountain tundra</span>

The Torngat Mountain tundra ecoregion covers the Torngat Mountains on the northeastern tip of the Labrador Peninsula where the provinces of Quebec and Newfoundland and Labrador meet. The mountains feature glacially carved U-shaped valleys and deep fjords. The vegetation over most of the territory is that of arctic tundra, herbaceous cover, or bare rock. The region supports seasonal polar bears, black bears, and caribou. The Atlantic coast is on the Atlantic Flyway for migratory birds.

<span class="mw-page-title-main">Tundra of North America</span>

The Tundra of North America is a Level I ecoregion of North America designated by the Commission for Environmental Cooperation (CEC) in its North American Environmental Atlas.

References

  1. 1 2 3 4 "The Atlas of Global Conservation". maps.tnc.org. Retrieved 2020-11-13.
  2. 1 2 "High Arctic tundra". World Wildlife Federation. Retrieved March 21, 2020.
  3. https://www.oneearth.org/ecoregions/canadian-high-arctic-tundra/
  4. "Map of Ecoregions 2017". Resolve, using WWF data. Retrieved September 14, 2019.
  5. 1 2 3 "High Arctic tundra". Digital Observatory for Protected Areas. Retrieved August 1, 2020.
  6. 1 2 3 4 5 "High Arctic tundra". The Encyclopedia of Earth. Retrieved August 28, 2020.
  7. Kottek, M.; Grieser, J.; Beck, C.; Rudolf, B.; Rubel, F. (2006). "World Map of Koppen-Geiger Climate Classification Updated" (PDF). Gebrüder Borntraeger 2006. Retrieved September 14, 2019.
  8. "Dataset - Koppen climate classifications". World Bank. Retrieved September 14, 2019.