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Endemism
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] |
Allopatric Speciation
Allopatric speciation () – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Various geographic changes can arise such as the movement of continents, and the formation of mountains, islands, bodies of water, or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography, resulting in the separation of a species population into isolated subpopulations. The vicariant populations then undergo genetic changes as they become subjected to different selective pressures, experience genetic drift, and accumulate different mutations in the separated populations' gene pools. The barriers prevent the exchange of genetic information betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vicariant
Allopatric speciation () – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Various geographic changes can arise such as the movement of continents, and the formation of mountains, islands, bodies of water, or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography, resulting in the separation of a species population into isolated subpopulations. The vicariant populations then undergo genetic changes as they become subjected to different selective pressures, experience genetic drift, and accumulate different mutations in the separated populations' gene pools. The barriers prevent the exchange of genetic information between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caucasus
The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically been considered as a natural barrier between Eastern Europe and Western Asia. Mount Elbrus in Russia, Europe's highest mountain, is situated in the Western Caucasus. On the southern side, the Lesser Caucasus includes the Javakheti Plateau and the Armenian highlands, part of which is in Turkey. The Caucasus is divided into the North Caucasus and South Caucasus, although the Western Caucasus also exists as a distinct geographic space within the North Caucasus. The Greater Caucasus mountain range in the north is mostly shared by Russia and Georgia as well as the northernmost parts of Azerbaijan. The Lesser Caucasus mountain range in the south is occupied by several independent states, mostly by Armenia, Azerbaijan, and Georgia, but also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Socotra
Socotra or Soqotra (; ar, سُقُطْرَىٰ ; so, Suqadara) is an island of the Republic of Yemen in the Indian Ocean, under the ''de facto'' control of the UAE-backed Southern Transitional Council, a secessionist participant in Yemen’s ongoing civil war. Lying between the Guardafui Channel and the Arabian Sea and near major shipping routes, Socotra is the largest of the four islands in the Socotra archipelago. Since 2013, the archipelago has constituted the Socotra Governorate. The island of Socotra represents around 95% of the landmass of the Socotra archipelago. It lies south of the Arabian Peninsula, but is considered to be part of Africa. The island is isolated and home to a high number of endemic species. Up to a third of its plant life is endemic. It has been described as "the most alien-looking place on Earth." The island measures in length and in width. In 2008 Socotra was recognised as a UNESCO World Heritage Site. In 2018, the United Arab Emirates invaded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galápagos Islands
The Galápagos Islands (Spanish: , , ) are an archipelago of volcanic islands. They are distributed on each side of the equator in the Pacific Ocean, surrounding the centre of the Western Hemisphere, and are part of the Republic of Ecuador. Located west of continental Ecuador, the islands are known for their large number of endemic species that were studied by Charles Darwin during the second voyage of HMS ''Beagle''. His observations and collections contributed to the inception of Darwin's theory of evolution by means of natural selection. The Galápagos Islands and their surrounding waters form the Galápagos Province of Ecuador, the Galápagos National Park, and the Galápagos Marine Reserve. The principal language on the islands is Spanish. The islands have a population of slightly over 25,000. The first recorded visit to the islands happened by chance in 1535, when Fray Tomás de Berlanga, the Bishop of Panamá, was surprised to find this undiscovered land on a vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orange-breasted Sunbird (Nectarinia Violacea)
The orange-breasted sunbird (''Anthobaphes violacea'') is a species of small, predominantly nectar-feeding bird that is endemic to the fynbos shrubland biome of southwestern South Africa. It is the only member of the genus ''Anthobaphes'', in the family Nectariniidae (the sunbirds and spiderhunters), though it is sometimes placed in the genus ''Nectarinia''. The birds are sexually dimorphic, with females being olive green while the males are orange to yellow on the underside with bright green, blue and purple on the head and neck. Taxonomy In 1760 the French zoologist Mathurin Jacques Brisson included a description of the orange-breasted sunbird in his ''Ornithologie'', based on a specimen collected from the Cape of Good Hope. He used the French name ''Le petit grimpereau a longue queue du Cap de Bonne Espérance'' and the Latin ''Certhia Longicauda Minor Capitis Bonae Spei''. The two stars (**) at the start of the section indicates that Brisson based his description on the exami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigenous (ecology)
In biogeography, a native species is indigenous to a given region or ecosystem if its presence in that region is the result of only local natural evolution (though often popularised as "with no human intervention") during history. The term is equivalent to the concept of indigenous or autochthonous species. Every wild organism (as opposed to a domesticated organism) is known as an introduced species within the regions where it was anthropogenically introduced. If an introduced species causes substantial ecological, environmental, and/or economic damage, it may be regarded more specifically as an invasive species. The notion of nativity is often a blurred concept, as it is a function of both time and political boundaries. Over long periods of time, local conditions and migratory patterns are constantly changing as tectonic plates move, join, and split. Natural climate change (which is much slower than human-caused climate change) changes sea level, ice cover, temperature, and r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Sugarbird
The Cape sugarbird (''Promerops cafer'') is one of the eight bird species endemic to the Fynbos biome of the Western Cape and Eastern Cape provinces of South Africa. Description The Cape sugarbird is a grey-brown bird that is easily recognisable by a spot of yellow under its tail and the very long tail feathers present in males. The male is 34–44 cm long, and the shorter-tailed, shorter-billed, and paler breasted female 25–29 cm long. Another characteristic of the Cape sugarbird is the sound it makes when it flies. The main flight feathers are arranged in such a way that when the bird beats its wings, a ''frrt-frrt'' sound is made with the intention of attracting females. Distribution and status The Cape sugarbird is distributed throughout most of the fire driven ecosystem of the Fynbos in South Africa, the dominant vegetation type of the Cape Floral Region where there are flowering proteas and ericas. It is most common in areas that have not burnt recently, and al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cytisus
''Cytisus'' is a genus of flowering plants in the family Fabaceae, native to open sites (typically scrub and heathland) in Europe, western Asia and North Africa. It belongs to the subfamily Faboideae, and is one of several genera in the tribe Genisteae which are commonly called brooms. They are shrubs producing masses of brightly coloured, pea-like flowers, often highly fragrant. Members of the segregate genera, ''Calicotome'', ''Chamaecytisus'', and ''Lembotropis'' are sometimes included in ''Cytisus''. Species , Kew's Plants of the World Online listed the following species: Hybrids and cultivars , the following hybrids had been described: * +''Laburnocytisus'' 'Adamii' (Poit.) C. K. Schneid. (''Laburnum anagyroides'' + ''Chamaecytisus purpureus'') (not a true hybrid but a graft-chimera) * ''Cytisus'' × ''beanii'' G.Nicholson (''Cytisus ardoini'' × ''Cytisus purgans'') * ''Cytisus'' × ''czerniaevii'' Krecz. * ''Cytisus'' × ''dallimorei'' Rolfe (''Cytisus multiflorus'' × ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic (epidemiology)
In epidemiology, an infection is said to be endemic in a specific population or populated place when that infection is constantly maintained at a baseline level without extra infections being brought into the group as a result of travel or similar means. An endemic disease always has a steady, predictable number of people getting sick, but that number can be high (''hyperendemic'') or low (''hypoendemic''), and the disease can be severe or mild. Also, a disease that is usually endemic can become epidemic. For example, chickenpox is endemic (steady state) in the United Kingdom, but malaria is not. Every year, there are a few cases of malaria reported in the UK, but these do not lead to sustained transmission in the population due to the lack of a suitable vector (mosquitoes of the genus ''Anopheles''). Consequently, the number of people infected by malaria is too variable to be called endemic. However, the number of people who get chickenpox in the UK varies little from year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montezuma Well - Panoramio
Montezuma or Moctezuma may refer to: People * Moctezuma I (1398–1469), the second Aztec emperor and fifth king of Tenochtitlan * Moctezuma II (c. 1460–1520), ninth Aztec emperor ** Pedro Moctezuma, a son of Montezuma II ** Isabel Moctezuma (1509/1510–1550/1551), a daughter of Montezuma II *** Leonor Cortés Moctezuma (c. 1528–?), daughter of Hernán Cortés and Isabel Montezuma **** Isabel de Tolosa Cortés de Moctezuma (1568–1619/1620), Mexican heiress, great-granddaughter of Montezuma II * Duke of Moctezuma de Tultengo, a Spanish hereditary title held by descendants of Moctezuma II * Carlos Montezuma (c. 1860–1923), Yavapai/Apache Native American activist * Carlos López Moctezuma (1909–1980), Mexican film actor * Eduardo Matos Moctezuma (born 1940), Mexican archaeologist * Esteban Moctezuma (born 1954), Mexican politician * Julio Rodolfo Moctezuma (1927–2000), Mexican lawyer, politician and banker * Leonidas de Montezuma (1869–1937), English cricketer * Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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