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Didymosphenia
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *'' Didymosphenia fossilis'' *''Didymosphenia geminata ''Didymosphenia geminata'', commonly known as didymo or rock snot, is a species of diatom that produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels. It is native to the nor ...'' *'' Didymosphenia lineata'' *'' Didymosphenia pumila'' *'' Didymosphenia sublinearis'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Geminata
''Didymosphenia geminata'', commonly known as didymo or rock snot, is a species of diatom that produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels. It is native to the northern hemisphere, and considered an invasive species in Australia, Argentina, New Zealand, and Chile. Even within its native range, it has taken on invasive characteristics since the 1980s. It is not considered a significant human health risk, but it can affect stream habitats and sources of food for fish and make recreational activities unpleasant. This microscopic alga can be spread in a single drop of water. Description ''Didymosphenia geminata'' is a diatom, which is a type of single-celled organism unique for their silica (SiO2) cell walls. The life history of diatoms includes both vegetative and sexual reproduction, though the sexual stage is not yet documented in this species. Although it is symmetric only along the apical axis, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Fossilis
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *'' Didymosphenia fossilis'' *''Didymosphenia geminata ''Didymosphenia geminata'', commonly known as didymo or rock snot, is a species of diatom that produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels. It is native to the nor ...'' *'' Didymosphenia lineata'' *'' Didymosphenia pumila'' *'' Didymosphenia sublinearis'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Lineata
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata ''Didymosphenia geminata'', commonly known as didymo or rock snot, is a species of diatom that produces nuisance growths in freshwater rivers and streams with consistently cold water temperatures and low nutrient levels. It is native to the nor ...'' *'' Didymosphenia lineata'' *'' Didymosphenia pumila'' *'' Didymosphenia sublinearis'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Pumila
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata'' *''Didymosphenia lineata ''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata ''Didymosphenia geminata'', commonly known as did ...'' *'' Didymosphenia pumila'' *'' Didymosphenia sublinearis'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Sublinearis
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata'' *''Didymosphenia lineata'' *''Didymosphenia pumila ''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata'' *''Didymosphenia lineata ''Didymosphenia'' is a ...'' *'' Didymosphenia sublinearis'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymosphenia Tatrensis
''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata'' *''Didymosphenia lineata'' *''Didymosphenia pumila'' *''Didymosphenia sublinearis ''Didymosphenia'' is a genus of diatoms belonging to the family Cymbellaceae. The genus has almost cosmopolitan distribution. Species: *''Didymosphenia fossilis'' *''Didymosphenia geminata'' *''Didymosphenia lineata'' *''Didymosphenia pumil ...'' *'' Didymosphenia tatrensis'' References {{Taxonbar, from=Q18572746 Cymbellales Diatom genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diatom
A diatom (Neo-Latin ''diatoma''), "a cutting through, a severance", from el, διάτομος, diátomos, "cut in half, divided equally" from el, διατέμνω, diatémno, "to cut in twain". is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of the Earth's biomass: they generate about 20 to 50 percent of the oxygen produced on the planet each year, take in over 6.7 billion metric tons of silicon each year from the waters in which they live, and constitute nearly half of the organic material found in the oceans. The shells of dead diatoms can reach as much as a half-mile (800 m) deep on the ocean floor, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by transatlantic winds from the African Sahara, much of it from the Bodélé Depression, which was once made up of a system of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymbellaceae
The Cymbellaceae are a diatom family in the order Cymbellales The Cymbellales are a diatom order in the class Bacillariophyceae. They include the following families Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other re .... Genera General include: * '' Alveocymba'' * '' Brebissonia'' Grunow, 1860 * '' Celebesia'' * '' Cymbella'' C. Agardh, 1830 * '' Cymbellafalsa'' Lange-Bertalot & Metzeltin, H. Lange-Bertalot & S. Nergui, 2009 * '' Cymbopleura'' (Krammer) Krammer in Lange-Bertalot & Genkal, 1999 * '' Delicatophycus'' * '' Didymosphenia'' Mart. Schmidt et al., 1899 * '' Encyonema'' * '' Encyonopsis'' * '' Gomphocymbellopsis'' Krammer, 2003 * '' Karthickia'' * '' Khursevichia'' * '' Kurtkrammeria'' L. Bahls, 2015 * '' Navicella'' Krammer, 1997 * '' Navicymbula'' Krammer, 2003 * '' Ochigma'' * '' Oricymba'' Jüttner, Krammer, E.J.Cox, Van de Vijver & Tuji et al., 2010 * '' Para ... [...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] |
Cymbellales
The Cymbellales are a diatom order in the class Bacillariophyceae. They include the following families Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideall ...: * Anomoeoneidaceae * Cymbellaceae * Gomphonemataceae * Rhoicospheniaceae References External links Diatom orders {{diatom-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
