The Scotia Sea is a

sea The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, ...

located at the northern edge of the

Southern Ocean The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. With a size of , it is regarded as the second-smal ...

at its boundary with the

South Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Africa, Europe an ...

. It is bounded on the west by the

Drake Passage The Drake Passage (referred to as Mar de Hoces Hoces Sea"in Spanish-speaking countries) is the body of water between South America's Cape Horn, Chile and the South Shetland Islands of Antarctica. It connects the southwestern part of the Atla ...

and on the north, east, and south by the Scotia Arc, an

undersea ridge A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of about and rises about above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a diver ...

and

island arc Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries. Most island arcs originate on oceanic crust and have resulted from the descent of the lithosphere into the mantle alon ...

system supporting various islands. The sea sits atop the

Scotia Plate The Scotia Plate () is a Plate tectonics, tectonic plate on the edge of the Atlantic Ocean, South Atlantic and Southern Ocean, Southern oceans. Thought to have formed during the early Eocene with the opening of the Drake Passage that separates ...

. It is named after the expedition ship ''Scotia''. Many

iceberg An iceberg is a piece of freshwater ice more than 15 m long that has broken off a glacier or an ice shelf and is floating freely in open (salt) water. Smaller chunks of floating glacially-derived ice are called "growlers" or "bergy bits". The ...

s melt there.

Location and description

The Scotia Sea is the area of water between the Drake Passage,

Tierra del Fuego Tierra del Fuego (, ; Spanish for "Land of the Fire", rarely also Fireland in English) is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the main island, Isla ...

South Georgia South Georgia ( es, Isla San Pedro) is an island in the South Atlantic Ocean that is part of the British Overseas Territory of South Georgia and the South Sandwich Islands. It lies around east of the Falkland Islands. Stretching in the east� ...

, the

South Sandwich Islands ) , anthem = "God Save the King" , song_type = , song = , image_map = South Georgia and the South Sandwich Islands in United Kingdom.svg , map_caption = Location of South Georgia and the South Sandwich Islands in the southern Atlantic Oce ...

, the

South Orkney Islands The South Orkney Islands are a group of islands in the Southern Ocean, about north-east of the tip of the Antarctic Peninsula Antarctic Peninsula The Antarctic Peninsula, known as O'Higgins Land in Chile and Tierra de San Martín in Argentina, and originally as Graham Land in the United Kingdom and the Palmer Peninsula in the United States, is the northernmost part of mainland Antarctic ...

. These island groups all sit atop the Scotia Arc, which frames the sea on the north, east, and south. The Scotia Sea covers an area around . About half of the sea stands above the

continental shelf A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island ...

History

The sea was named about 1932 after the ''

Scotia Scotia is a Latin placename derived from ''Scoti'', a Latin name for the Gaels, first attested in the late 3rd century.Duffy, Seán. ''Medieval Ireland: An Encyclopedia''. Routledge, 2005. p.698 The Romans referred to Ireland as "Scotia" around ...

'', the expedition ship used in these waters by the Scottish National Antarctic Expedition (1902–04) under William S. Bruce. The most famous traverse of this frigid sea was made near the end of the

Imperial Trans-Antarctic Expedition The Imperial Trans-Antarctic Expedition of 1914–1917 is considered to be the last major expedition of the Heroic Age of Antarctic Exploration. Conceived by Sir Ernest Shackleton, the expedition was an attempt to make the first land crossing ...

in 1916 by Sir

Ernest Shackleton Sir Ernest Henry Shackleton (15 February 1874 – 5 January 1922) was an Anglo-Irish Antarctic explorer who led three British expeditions to the Antarctic. He was one of the principal figures of the period known as the Heroic Age o ...

and five others in the adapted lifeboat ''James Caird''. They left

Elephant Island Elephant Island is an ice-covered, mountainous island off the coast of Antarctica in the outer reaches of the South Shetland Islands, in the Southern Ocean. The island is situated north-northeast of the tip of the Antarctic Peninsula, west-so ...

, just off the tip of the Antarctic Peninsula and reached

South Georgia Island South Georgia ( es, Isla San Pedro) is an island in the South Atlantic Ocean that is part of the British Overseas Territory of South Georgia and the South Sandwich Islands. It lies around east of the Falkland Islands. Stretching in the east� ...

two weeks later. It was a distance of nearly 900 miles and the sun was only sighted four times during the entire journey. In

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the List of South American countries by area, second-largest ...

, the Scotia Sea is considered part of an area known as the ''Mar Argentino'', and several territories claimed but not occupied by Argentina, such as South Georgia and the Falkland Islands, lie within this region.

Flora and fauna

The islands bordering the Scotia Sea are rocky and partly covered in ice and snow year round; despite these harsh conditions, however, the islands do support vegetation and have been described as the Scotia Sea Islands tundra

ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of ...

, which includes South Georgia, the volcanic South Sandwich Islands, and the South Orkneys in the Scotia Sea, as well as the remote

South Shetland Islands The South Shetland Islands are a group of Antarctic islands with a total area of . They lie about north of the Antarctic Peninsula, and between southwest of the nearest point of the South Orkney Islands. By the Antarctic Treaty of 1 ...

near the Antarctic Peninsula and the small isolated volcano called

Bouvet Island Bouvet Island ( ; or ''Bouvetøyen'') is an island claimed by Norway, and declared an uninhabited protected nature reserve. It is a subantarctic volcanic island, situated in the South Atlantic Ocean at the southern end of the Mid-Atlantic R ...

. All these islands lie in the cold seas below the

Antarctic convergence The Antarctic Convergence or Antarctic Polar Front is a marine belt encircling Antarctica, varying in latitude seasonally, where cold, northward-flowing Antarctic waters meet the relatively warmer waters of the sub-Antarctic. Antarctic waters pr ...

. These areas support

tundra In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless mou ...

vegetation consisting of

moss Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta ('' sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and ...

es,

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular micr ...

, while seabirds, penguins, and seals feed in the surrounding waters. Seabirds include four species of albatross: black-browed albatross ''( Thalassarche melanophris)'', grey-headed albatross ''(

Thalassarche chrysostoma The grey-headed albatross (''Thalassarche chrysostoma'') also known as the gray-headed mollymawk, is a large seabird from the albatross family. It has a circumpolar distribution, nesting on isolated islands in the Southern Ocean and feeding at h ...

)'', light-mantled albatross ''(

Phoebetria palpebrata The light-mantled albatross (''Phoebetria palpebrata'') also known as the grey-mantled albatross or the light-mantled sooty albatross, is a small albatross in the genus '' Phoebetria'', which it shares with the sooty albatross. The light-mantle ...

)'', and wandering albatross ''( Diomedea exulans)''. Only five species of birds remain on land on the islands, and these include an endemic race of the yellow-billed pintail duck ''( Anas georgica)'' and the endemic South Georgia pipit ''( Anthus antarcticus)''. Other birds include the

southern giant petrel The southern giant petrel (''Macronectes giganteus''), also known as the Antarctic giant petrel, giant fulmar, stinker, and stinkpot, is a large seabird of the southern oceans. Its distribution overlaps broadly with the similar northern giant pet ...

, with sizeable colonies on Bird Island.

Penguin Penguins (order Sphenisciformes , family Spheniscidae ) are a group of aquatic flightless birds. They live almost exclusively in the Southern Hemisphere: only one species, the Galápagos penguin, is found north of the Equator. Highly adap ...

species found here include large numbers of

king penguin The king penguin (''Aptenodytes patagonicus'') is the second largest species of penguin, smaller, but somewhat similar in appearance to the emperor penguin. There are two subspecies: ''A. p. patagonicus'' and ''A. p. halli''; ''patagonicus'' ...

s on South Georgia especially, as well as chinstrap penguin,

macaroni penguin The macaroni penguin (''Eudyptes chrysolophus'') is a species of penguin found from the Subantarctic to the Antarctic Peninsula. One of six species of crested penguin, it is very closely related to the royal penguin, and some authorities consid ...

, gentoo penguin,

Adelie penguin Adelie or Adélie may refer to: * Adélie Land, a claimed territory on the continent of Antarctica * Adelie Land meteorite, a meteorite discovered on December 5, 1912, in Antarctica by Francis Howard Bickerton * Adélie penguin The Adélie pen ...

, and rockhopper penguin ''( Eudyptes chrysocome)''. Seals include the Antarctic fur seal ''(

Arctocephalus gazella The Antarctic fur seal (''Arctocephalus gazella''), is one of eight seals in the genus ''Arctocephalus'', and one of nine fur seals in the subfamily Arctocephalinae. Despite what its name suggests, the Antarctic fur seal is mostly distributed i ...

)'' and sub-Antarctic fur seal ''( Arctocephalus tropicalis)'' in large numbers,

leopard seal The leopard seal (''Hydrurga leptonyx''), also referred to as the sea leopard, is the second largest species of seal in the Antarctic (after the southern elephant seal). Its only natural predator is the orca. It feeds on a wide range of prey incl ...

''(Hydrurga leptonyx)'',

Weddell seal The Weddell seal (''Leptonychotes weddellii'') is a relatively large and abundant true seal with a circumpolar distribution surrounding Antarctica. The Weddell seal was discovered and named in the 1820s during expeditions led by British seali ...

''(Leptonychotes weddellii)'', the huge

southern elephant seal The southern elephant seal (''Mirounga leonina'') is one of two species of elephant seals. It is the largest member of the clade Pinnipedia and the order Carnivora, as well as the largest extant marine mammal that is not a cetacean. It gets its ...

''(Mirounga leonina)'', and

crabeater seal The crabeater seal (''Lobodon carcinophaga''), also known as the krill-eater seal, is a true seal with a circumpolar distribution around the coast of Antarctica. They are medium- to large-sized (over 2 m in length), relatively slender and pale-c ...

''(Lobodon carcinophagus)''.

Threats and preservation

Although the Scotia Arc islands have a harsh climate and have never been permanently occupied, they have long been used as a base for fishing and seal hunting. Wildlife on these remote islands is threatened by

introduced species An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there ...

, especially on South Georgia, where even large animals, including (now removed)

reindeer Reindeer (in North American English, known as caribou if wild and ''reindeer'' if domesticated) are deer in the genus ''Rangifer''. For the last few decades, reindeer were assigned to one species, ''Rangifer tarandus'', with about 10 subs ...

, have been brought to the islands. Further damage to ecosystems results from overfishing. South Georgia, the South Sandwich Islands, and Bouvet Island are protected as nature reserves, with Bird Island, South Georgia, being a

site of special scientific interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle ...

. The seals are further protected by international agreements, and fur seal populations are recovering.

References

{{Authority control Marginal seas of the Atlantic Ocean Seas of the Southern Ocean Tundra Antarctic region 1930s neologisms

Location and description

History

Flora and fauna

Threats and preservation

See also

References