High Arctic tundra

The High Arctic tundra ecoregion (WWF ID:NA1110) covers most of Canada's northern Arctic Archipelago - from the Queen Elizabeth Islands nearest to Greenland in the northeast, and down through the center of Baffin Island. 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][3][4][5]

High Arctic tundra
Truelove Lowlands, Devon Island
Ecoregion territory (in green)
Ecology
RealmNeoarctic
BiomeTundra
BordersDavis Highlands tundra, Kalaallit Nunaat high arctic tundra and Middle Arctic tundra
Bird species44[1]
Mammal species10[1]
Geography
Area464,788 km2 (179,456 sq mi)
CountryCanada
TerritoriesNorthwest Territories and Nunavut
Coordinates75.25°N 89.75°W / 75.25; -89.75
Conservation
Conservation statusRelatively Stable/Intact[2]
Habitat loss0%[1]
Protected9.9%[1]

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).[5]

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.[5]

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).[6][7]

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.[4] 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).[5]

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).[5]

Protected areas

Over 10% of the ecoregion is officially protected.[4] These protected areas include:

See also

References
  1. "The Atlas of Global Conservation". maps.tnc.org. Retrieved 2020-11-13.
  2. "High Arctic tundra". World Wildlife Federation. Retrieved March 21, 2020.
  3. "Map of Ecoregions 2017". Resolve, using WWF data. Retrieved September 14, 2019.
  4. "High Arctic tundra". Digital Observatory for Protected Areas. Retrieved August 1, 2020.
  5. "High Arctic tundra". The Encyclopedia of Earth. Retrieved August 28, 2020.
  6. Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006. "World Map of Koppen-Geiger Climate Classification Updated" (PDF). Gebrüder Borntraeger 2006. Retrieved September 14, 2019.CS1 maint: multiple names: authors list (link)
  7. "Dataset - Koppen climate classifications". World Bank. Retrieved September 14, 2019.
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