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Green Island (Berthelot Islands)
Green Island is one of the Berthelot Islands group, lying off the west coast of Graham Land, Antarctica. Description The island is about 20 ha in area. It lies 150 m north of the largest of the Berthelot Islands group, some 3 km off the Graham Coast of the Antarctic Peninsula. It is 520 m long from north to south and 500 m wide from east to west, rising to a rounded peak 83 m high. It rises steeply on all sides, with precipitous cliffs on the southern and eastern sides. Antarctic Specially Protected Area It is protected as Antarctic Specially Protected Area (ASPA) No.108 because of its vegetation which was described as “probably the most luxuriant anywhere on the west side of the Antarctic Peninsula”. On its north-facing slopes it has well-developed banks of moss turf formed by '' Polytrichum strictum'' and '' Chorisodontium aciphyllum'' overlying peat more than a metre deep. Antarctic hair grass grows in small patches on the steep, rocky north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cormoran Impérial - Imperial Shag
Cormoran ( or ) is a giant associated with St. Michael's Mount in the folklore of Cornwall. Local tradition credits him with creating the island, in some versions with the aid of his wife Cormelian, and using it as a base to raid cattle from the mainland communities. Cormoran appears in the English fairy tale "Jack the Giant Killer" as the first giant slain by the hero, Jack, and in tales of "Tom the Tinkeard" as a giant too old to present a serious threat. Origin One of many giants featured in Cornish folklore, the character derives from local traditions about St. Michael's Mount. The name "Cormoran" is not found in the early traditions; it first appears in the chapbook versions of the "Jack the Giant Killer" story printed in Newcastle-upon-Tyne and Nottingham, and is not of Cornish origin. The name may be related to Corineus, the legendary namesake of Cornwall. Corineus is associated with St. Michael's Mount, and is credited with defeating a giant named Gogmagog in Geoffrey o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berthelot Islands
The Berthelot Islands are a group of rocky islands, the largest long, lying south-west of Deliverance Point, off the west coast of Graham Land, Antarctica. They were discovered by the French Antarctic Expedition, 1903–05, under Jean-Baptiste Charcot, and named by him for Marcellin Berthelot, a prominent French chemist. One of the group, Green Island, is protected as Antarctic Specially Protected Area (ASPA) No.108 because of its relatively luxuriant vegetation and large Antarctic shag colony In modern parlance, a colony is a territory subject to a form of foreign rule. Though dominated by the foreign colonizers, colonies remain separate from the administration of the original country of the colonizers, the ''metropole, metropolit .... See also * List of Antarctic and subantarctic islands * Urchin Rock References Islands of Graham Land Graham Coast {{GrahamCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graham Land
Graham Land is the portion of the Antarctic Peninsula that lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in which the name "Antarctic Peninsula" was approved for the major peninsula of Antarctica, and the names Graham Land and Palmer Land for the northern and southern portions, respectively. The line dividing them is roughly 69 degrees south. Graham Land is named after Sir James R. G. Graham, First Lord of the Admiralty at the time of John Biscoe's exploration of the west side of Graham Land in 1832. It is claimed by Argentina (as part of Argentine Antarctica), Britain (as part of the British Antarctic Territory) and Chile (as part of the Chilean Antarctic Territory). Graham Land is the closest part of Antarctica to South America. Thus it is the usual destination for small ships taking paying ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hectare
The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about and one hectare contains about . In 1795, when the metric system was introduced, the ''are'' was defined as 100 square metres, or one square decametre, and the hectare ("hecto-" + "are") was thus 100 ''ares'' or km2 (10,000 square metres). When the metric system was further rationalised in 1960, resulting in the International System of Units (), the ''are'' was not included as a recognised unit. The hectare, however, remains as a non-SI unit accepted for use with the SI and whose use is "expected to continue indefinitely". Though the dekare/decare daa (1,000 m2) and are (100 m2) are not officially "accepted for use", they are still used in some contexts. Description The hectare (), although not a unit of SI, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic Specially Protected Area
An Antarctic Specially Protected Area (ASPA) is an area on the continent of Antarctica, or on nearby islands, which is protected by scientists and several different international bodies. The protected areas were established in 1961 under the Antarctic Treaty System, which governs all the land and water south of 60 latitude and protects against human development. A permit is required for entry into any ASPA site. The ASPA sites are protected by the governments of Australia, New Zealand, United States, United Kingdom, Chile, France, Argentina, Poland, Russia, Norway, Japan, India, Italy, and Republic of Korea. There are currently 72 sites. List of ASPA sites See also *Antarctic Specially Managed Area An Antarctic Specially Managed Area (ASMA) is a protected area on the continent of Antarctica, or on its adjacent islands. ASMAs are managed by the governments of Brazil, Poland, Ecuador, Peru, United States, New Ze ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polytrichum Strictum
''Polytrichum strictum'', commonly known as bog haircap moss or strict haircap, is an evergreen and perennial species of moss native to ''Sphagnum'' bogs and other moist habitats in temperate climates. It has a Circumboreal Region, circumboreal distribution, and is also found in South America and Antarctica. Description Like other species in the Polytrichaceae, ''Polytrichum strictum'' has leaves with a single costa, vertical Lamella (surface anatomy), lamellae, a water-repelling cuticle, and rhizoids that appear to facilitate external water movement in addition to anchoring the plant. Dense tufts of slender stems from 6–12 cm form 20–40 cm hummocks in bogs and similar substrates. Leaves are narrowly lanceolate, appressed to the stem when dry and spreading to erect when moist. The reddish awn (formed by the slightly excurrent costa) and smooth, inrolled leaf margins separate ''P. strictum'' from other Polytrichum species; only Polytrichum juniperinum, juniper ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chorisodontium Aciphyllum
''Chorisodontium aciphyllum'' is a species of moss found primarily on both sides of the Drake Passage. The species exhibits an extreme degree of cryptobiosis – the ability of a life form to enter a non- metabolic state, extending life indefinitely. Description ''Chorisodontium aciphyllum'' grows in banks along the Antarctic coast in the Drake Passage region. It has also been found in Argentina, Chile, Antarctica, New Zealand, and South Georgia. As the moss banks grow taller, the layers more than an inch below the surface turn brown from lack of sun exposure and eventually become part of the permafrost. The mounds of moss can grow to be more than tall. ''Chorisodontium aciphyllum'' was first described by Joseph Dalton Hooker and William M. Wilson in 1844 as ''Dicranum aciphyllum'' in the '' London Journal of Botany''. Viktor Ferdinand Brotherus reclassified the species into its current genus in 1924. Cryptobiosis In 2014, terrestrial ecologist Peter Convey and his col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficient carbon sink on the planet, because peatland plants capture carbon dioxide (CO2) naturally released from the peat, maintaining an equilibrium. In natural peatlands, the "annual rate of biomass production is greater than the rate of decomposition", but it takes "thousands of years for peatlands to develop the deposits of , which is the average depth of the boreal orthernpeatlands", which store around 415 gigatonnes (Gt) of carbon (about 46 times 2019 global CO2 emissions). Globally, peat stores up to 550 Gt of carbon, 42% of all soil carbon, which exceeds the carbon stored in all other vegetation types, including the world's forests, although it covers just 3% of the land's surface. ''Sphagnum'' moss, also called peat moss, is one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deschampsia Antarctica
''Deschampsia antarctica'', the Antarctic hair grass, is one of two flowering plants native to Antarctica, the other being ''Colobanthus quitensis'' (Antarctic pearlwort). They mainly occur on the South Orkney Islands, the South Shetland Islands, and along the western Antarctic Peninsula. A recent warming trend has increased germination, and thus number of seedlings and plants, also extending their range southward to cover larger areas; reports indicate a twenty-fivefold increase in their number. ''Deschampsia antarctica'' has been recorded by the Guinness Book of World Records as the southernmost flowering plant. In 1981, a specimen was found on the Antarctic Peninsula's Refuge Islands at a latitude of 68°21′S. Since 2009, both ''D.'' ''antarctica'' and ''C. quitensis'' have been spreading rapidly, which studies suggest has been the result of rising air temperatures and a reduction in the number of Fur seal, fur seals. See also * Antarctic flora References External li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Colony
A bird colony is a large congregation of individuals of one or more species of bird that nest or roost in proximity at a particular location. Many kinds of birds are known to congregate in groups of varying size; a congregation of nesting birds is called a breeding colony. Colonial nesting birds include seabirds such as auks and albatrosses; wetland species such as herons; and a few passerines such as weaverbirds, certain blackbirds, and some swallows. A group of birds congregating for rest is called a communal roost. Evidence of colonial nesting has been found in non- neornithine birds ( Enantiornithes), in sediments from the Late Cretaceous (Maastrichtian) of Romania. Variations on colonial nesting in birds Approximately 13% of all bird species nest colonially. Nesting colonies are very common among seabirds on cliffs and islands. Nearly 95% of seabirds are colonial, leading to the usage, seabird colony, sometimes called a rookery. Many species of terns nest in colonie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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