East Antarctica
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East Antarctica, also called Greater Antarctica, constitutes the majority (two-thirds) of the Antarctic continent, lying primarily in the Eastern Hemisphere south of the Indian Ocean, and separated from West Antarctica by the Transantarctic Mountains. It is generally greater in elevation than West Antarctica, and includes the Gamburtsev Mountain Range in the center. The geographic South Pole is located within East Antarctica.
Apart from small areas of the coast, East Antarctica is permanently covered by ice and it has relatively low biodiversity, with only a small number of species of terrestrial plants, animals, algae, and lichens. The coasts are the breeding ground for various seabirds and penguins, and the leopard seal, Weddell seal, elephant seal, crabeater seal and Ross seal breed on the surrounding pack ice in summer.
Location and description
Almost completely covered in thick, permanent ice, East Antarctica comprises
The subglacial Gamburtsev Mountain Range, about the size of the European Alps, in the center of East Antarctica, are believed to have been the nucleation site for the East Antarctic Ice Sheet, just underneath Dome A.
Flora and fauna
Very little of East Antarctica is not covered with ice. The small areas that remain free of ice (Antarctic oasis), including the McMurdo Dry Valleys inland, constitute a tundra-type biodiversity region known as Maudlandia Antarctic desert, after Queen Maud Land. There are no trees or shrubs, as only very limited plant life can survive here; the flora consists of lichens, moss, and algae that are adapted to the cold and wind, and cling to rocks.
The coasts are home to seabirds, penguins, and seals (Pinnipeds), which feed in the surrounding ocean, including the emperor penguin, which famously breeds in the cold, dark Antarctic winter.
Seabirds of the coast include southern fulmar (
The seals of the
There are no large land animals but bacteria, nematodes, springtails, mites, and midges live on the mosses and lichens.[1]
Threats and preservation
The remote and extremely cold bulk of Antarctica remains almost entirely untouched by human intervention. The area is protected by the Antarctic Treaty System which bans industrial development, waste disposal and nuclear testing, while the Barwick Valley, one of the Dry Valleys, Mount Rittmann, and Cryptogam Ridge on Mount Melbourne are specially protected areas for their undisturbed plant life.
See also
- East Antarctic craton
- Polar plateau
References
- ^ "Maudlandia Antarctic desert". Terrestrial Ecoregions. World Wildlife Fund.
This article incorporates public domain material from "East Antarctica". Geographic Names Information System. United States Geological Survey.
External links
- World Wildlife Fund, C. M. Hogan, S. Draggan. (2011) Marielandia Antarctic tundra. in C. J. Cleveland, ed., Encyclopedia of Earth. National Council for Science and the Environment, Washington, DC