The time zone of the islands is UTC+5. [36] Glaciers on the northern and western coasts have narrowed significantly, while the area of glaciers and ice caps on Laurens Peninsula have shrunk by 30% - 65%. The islands have been identified by BirdLife International as an Important Bird Area because they support very large numbers of nesting seabirds. Inaccessible Island har inte några permanent bosatta. The coastline is 101.9 kilometres (63.3 mi), and a 12-nautical-mile (22 km; 14 mi) territorial sea and 200-nautical-mile (370 km; 230 mi) exclusive fishing zone are claimed.[1]. 20.58. 1976 blev Inaccessible Island erklæret som naturreservat, mens beboerne på Tristan da Cunha stadig har lov til at fange søfugle på øen. Report of the Twenty-First Meeting of the Scientific Committee for the Conservation of Antarctic Marine Living Resources, Hobart, Australia. The limpet Nacella kerguelensis is abundant in the lower part of the shore, being found on rock surfaces and on kelp holdfasts. Heard Island has a range of terrestrial environments in which vegetation occurs. The surrounding waters are important feeding areas for birds and some scavenging species also derive sustenance from their cohabitants on the islands. At least 100 species of terrestrial algae are known from Heard Island, commonly in permanently moist and ephemeral habitats. [21], Heard Island and the McDonald Islands are free from introduced predators and provide crucial breeding habitat in the middle of the vast Southern Ocean for a range of birds. A further 28 seabird species are recorded as either non-breeding visitors or have been noted during 'at-sea surveys' of the islands. Det finns två alternativa förklaringar till varför ön fått namnet Inaccessible. År 1922 gjorde Ernest Shackletons skepp Quest ett kort stopp vid ön och botanisten Hubert Wilkins upptäckte en fågelart på ön som fick hans namn (Nesospiza wilkinsi). Downloaded from.

[34] The US Navy vessels MV Cory Chouest and Amy Chouest were used to transmit signals which could be detected as far away as both ocean coasts of the US and Canada. [39], The coastal ice cliffs of Brown and Stephenson Glaciers, which in 1954 were over 50 feet high, had disappeared by 1963 when the glaciers terminated as much as 100 yards inland. Despite Heard Island's isolation, species richness is considered to be moderate, rather than depauperate, although the number of endemic species reported is low. In the sailing period from 1855 to 1880 a number of American sealers spent a year or more on the island, living in appalling conditions in dark smelly huts, also at Oil Barrel Point. Heard Island is a heavily glacierized, subantarctic volcanic island located in the Southern Ocean, roughly 4000 kilometers southwest of Australia. The large macro-alga Durvillaea antarctica supports a diverse array of invertebrate taxa and may play an important role in transporting some of this fauna to Heard Island. History. Heard Island supports a relatively low number of terrestrial invertebrate species compared to other Southern Ocean islands, in parallel with the low species richness in the flora–that is, the island's isolation and limited ice-free area. Two species, including the thrips Apterothrips apteris and the mite Tyrophagus putrescentiae are thought to be recent, possibly natural, introductions. The islands lie on the Kerguelen Plateau in the Indian Ocean. William McDonald aboard the Samarang discovered the nearby McDonald Islands six weeks later, on 4 January 1854.[28]. Despite a few recent surveys, the non-arthropod invertebrate fauna of Heard Island remain poorly known. The site was renamed Gough and Inaccessible Islands.. Øya er sammen med Gough Island et naturreservat og er på verdensarvlisten til UNESCO.. Historie. Crabeater, Ross and Weddell seals are occasional visitors. Inaccessible Island er en ø i den sydlige del af Atlanterhavet og en uddød vulkan. Gusts in excess of 180 km/h (110 mph) have been recorded. All recorded breeding species, other than the Heard Island sheathbill, are listed marine species under the Australian Environmental Protection and Biodiversity Act (1999, four are listed as threatened species and five are listed migratory species. Inaccessible Island is fringed with sheer sea cliffs but can be landed on via a few boulder beaches. A number of wrecks have occurred in the vicinity of the islands. Mostly desolate and inhospitable, the island has one small landing site named Port David on the northwesternmost point. [1] The archipelago became a World Heritage Site in 1997. Al The vascular flora comprises the smallest number of species of any major subantarctic island group, reflecting its isolation, small ice-free area and severe climate. Sankta Helena, Ascension och Tristan da Cunha, UNESCO världsarv Inaccessible Islands och Gough, Protected Areas Programme: Gough Island Wildlife Reserve, University of Central Lancashire: Inaccessible Island, Geology of Tristan da Cunha and Inaccessible Island, https://sv.wikipedia.org/w/index.php?title=Inaccessible_Island&oldid=47372773, Artiklar som behöver enstaka källor 2013-02, Creative Commons Erkännande-dela-lika 3.0 Unported. SC–CAMLR 2002. Snowfall occurs throughout the year. It has a maximum elevation of 2,745 metres (9,006 ft) at Mawson Peak, the historically active volcanic summit of Big Ben. Norske forskere havde en ekspedition til øen i 1938. [36][37], During the time period between 1947 and 1988, the total area of Heard Island's glaciers decreased by 11%, from 288 km2 (roughly 79% of the total area of Heard Island) to only 257 km2. Woehler, E.J. The fauna of the freshwater pools, lakes, streams and mires found in the coastal areas of Heard Island are broadly similar to those on other subantarctic islands of the southern Indian Ocean. The islands have an Antarctic climate, tempered by their maritime setting. These include the southern elephant seal and macaroni, gentoo, king and eastern rockhopper penguins, considered to be wetland species under the Ramsar Convention. Wikipedias text är tillgänglig under licensen.

No landing took place on the islands until March 1855, when sealers from the Corinthian, led by Erasmus Darwin Rogers, went ashore at a place called Oil Barrel Point. The amphipod Hyale sp.

The recent DXpedition in March 2016 (VK0EK) was organised by Cordell Expeditions,[32] and made over 75,000 radio contacts. Generations of sailors were wary of the difficult landings and inhospitable terrain. This caused the seal populations there to either become locally extinct or reduced to levels too low to exploit economically. Two amateur radio DXpeditions to the island took place in 1983 using the callsigns VK0HI (the Anaconda expedition)[31] and VK0JS and VK0NL (the Cheynes II expedition), with a further operation in January 1997 (VK0IR). Changes in population numbers of seal and seabird species are also expected to affect the vegetation by changing nutrient availability and disturbance through trampling. Mawson Peak atop Big Ben was first climbed on 25 January 1965 by five members of the Southern Indian Ocean Expedition to Heard Island (sometimes referred to as the Patanela expedition).