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Agrostis Trachychlaena
''Agrostis trachychlaena'' is a species of grass in the family Poaceae. It is endemic to Inaccessible and Nightingale Islands, Tristan da Cunha. Its natural habitat is subantarctic grassland A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur natur .... Less than 250 mature individuals are thought to exist. References trachychlaena Endangered plants Flora of Tristan da Cunha Taxonomy articles created by Polbot {{Pooideae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Edward Hubbard
Charles Edward Hubbard (23 May 19008 May 1980) was a British botanist, specialising in agrostology – the study of grasses. He was considered "the world authority on the classification and recognition of grasses" in his time. He is indicated by the Author citation (botany), author abbreviation C.E.Hubb. when citing a botanical name. Biography Charles Edward Hubbard was born on 23 May 1900 in Appleton, a hamlet on the Sandringham Estate in Norfolk, where his father, also named Charles Edward Hubbard, was the head gardener at Appleton House to Maud of Wales, the Queen of Norway. He was schooled at Sandringham, and at King Edward VII School (King's Lynn), King Edward VII Grammar School in King's Lynn, before joining the staff of the Royal Gardens at Sandringham in 1916. During his time there, he also spent five months at the Bygdøy Royal Estate near Oslo, and served for seven months in the Royal Air Force. Kew Gardens In April 1920, Hubbard left the Sandringham Estate to join ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poaceae
Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns and pasture. The latter are commonly referred to collectively as grass. With around 780 genera and around 12,000 species, the Poaceae is the fifth-largest plant family, following the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. The Poaceae are the most economically important plant family, providing staple foods from domesticated cereal crops such as maize, wheat, rice, barley, and millet as well as feed for meat-producing animals. They provide, through direct human consumption, just over one-half (51%) of all dietary energy; rice provides 20%, wheat supplies 20%, maize (corn) 5.5%, and other grains 6%. Some members of the Poaceae are used as building materials (bamboo, thatch, and straw); others can provide a source of biofuel, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inaccessible Island
Inaccessible Island is a volcanic island located in the South Atlantic Ocean, south-west of Tristan da Cunha. Its highest point, Cairn Peak, reaches , and the island is in area. The volcano was last active six million years ago and is currently extinct. Inaccessible Island is part of the archipelago of Tristan da Cunha, which is part of the overseas territory of the United Kingdom known as Saint Helena, Ascension and Tristan da Cunha. Tristan da Cunha itself is accessible only by sea via a seven-day voyage from Cape Town, South Africa, and the harbour on Inaccessible Island allows access for only a few days of the year. Access to the island must be granted by the local government office. Geography The island is approximately to the southwest of the main island of the Tristan da Cunha archipelago. Mostly desolate and inhospitable, the island has few small, rocky beaches. Generations of sailors were wary of the difficult landing and inhospitable terrain. Inaccessible Islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nightingale Island
Nightingale Island is an active volcanic island in the South Atlantic Ocean, in area, part of the Tristan da Cunha group of islands. They are administered by the United Kingdom as part of the British overseas territory, overseas territory of Saint Helena, Ascension and Tristan da Cunha. Nightingale Island is part of the Nightingale Islands, which also includes islets Middle Island, Tristan da Cunha, Middle Island and Stoltenhoff Island. All three are uninhabited, but are regularly visited for scientific purposes and research. Geography Nightingale has two peaks on its north end. One is high while the other is high. The rest of the island is ringed by cliffs. However, these cliffs are not nearly as high as those surrounding Nightingale's neighbour Inaccessible Island, Tristan da Cunha, Inaccessible Island, which is approximately 16 km away and has cliffs approximately 300m high. Thus human access is much easier on Nightingale than on Inaccessible. The island is a volcano, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tristan Da Cunha
Tristan da Cunha (), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately from Cape Town in South Africa, from Saint Helena and from the Falkland Islands. The territory consists of the inhabited island, Tristan da Cunha, which has a diameter of roughly and an area of ; the wildlife reserves of Gough Island and Inaccessible Island; and the smaller, uninhabited Nightingale Islands. , the main island has 250 permanent inhabitants, who all carry British Overseas Territories citizenship. The other islands are uninhabited, except for the South African personnel of a weather station on Gough Island. Tristan da Cunha is a British Overseas Territory with its own constitution. There is no airstrip on the main island; the only way of travelling in and out of Tristan is by boat, a six-day trip from South Africa. History Discovery The uninhabited islands were f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors will include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, with habitat generalist species able to thrive in a wide array of environmental conditions while habitat specialist species requiring a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. Furthermore, grasslands are one of the largest biomes on earth and dominate the landscape worldwide. There are different types of grasslands: natural grasslands, semi-natural grasslands, and agricultural grasslands. They cover 31–69% of the Earth's land area. Definitions Included among the variety of definitions for grasslands are: * "...any plant community, including harvested forages, in which grasses and/or legumes make up the dominant vegetation." * "...terrestrial ecosystems dominated by herbaceous and shrub vegetation, and maintained by fire, grazing, drought and/or freezing temperatures." (Pilot Assessment of Global Ecosystems, 2000) * "A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LiveScience
Live Science is a science news website run by Future via Purch, which it purchased from Imaginova in 2009. Stories and editorial commentary are typically syndicated to major news outlets, such as Yahoo!, MSNBC, AOL, and Fox News.{{fact, date=March 2020 Live Science was originally launched in 2004, but was subsequently shut down and re-launched in 2007. Live Science covers scientific breakthroughs, research ventures and odd facts from around the world in an online newsmagazine format. Purch consumer brands (including Live Science) were acquired by Future in 2018.{{Cite web , url=https://www.futureplc.com/brand/live-science/ , title=Live Science , work=Future plc Future plc is an international multimedia company established in the United Kingdom in 1985. The company has over 220 brands that span magazines, newsletters, websites, and events in fields such as video games, technology, films, music, photogr ... , access-date=18 December 2018 References {{reflist External links ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agrostis
''Agrostis'' (bent or bentgrass) is a large and very nearly cosmopolitan genus of plants in the grass family, found in nearly all the countries in the world. It has been bred as a GMO creeping bent grass. Species * '' Agrostis aequivalvi'' (Arctic bent) * '' Agrostis agrostiflora'' * ''Agrostis alpina'' * '' Agrostis ambatoensis'' * '' Agrostis × amurensis'' * '' Agrostis anadyrensis'' * '' Agrostis angrenica'' * ''Agrostis arvensis'' * ''Agrostis atlantica'' * ''Agrostis australiensis'' * '' Agrostis bacillata'' * ''Agrostis balansae'' * '' Agrostis barceloi'' * '' Agrostis basalis'' * ''Agrostis bergiana'' * ''Agrostis bettyae'' * ''Agrostis × bjoerkmannii'' * '' Agrostis blasdalei'' * ''Agrostis boliviana'' * ''Agrostis boormanii'' * ''Agrostis bourgaei'' * ''Agrostis boyacensis'' * ''Agrostis brachiata'' * ''Agrostis brachyathera'' * ''Agrostis breviculmis'' * ''Agrostis burmanica'' * '' Agrostis calderoniae'' * ''Agrostis canina'' (velvet bent) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Plants
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 3654 endangered plant species. 17% of all evaluated plant species are listed as endangered. The IUCN also lists 99 subspecies and 101 varieties as endangered. No subpopulations of plants have been evaluated by the IUCN. For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of exintction". An even higher risk is faced by ''critically endangered'' species, which meet the quantitative criteria for endangered species. Critically endangered plants are listed separately. There are 6147 plant species which are endangered or critically endangered. Additionally 1674 plant species (7.6% of those evaluated) are listed as '' data deficient'', meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Tristan Da Cunha
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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