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Characeae
Characeae is a family of freshwater green algae in the order Charales, commonly known as stoneworts. They are also known as brittleworts or skunkweed, from the fragility of their lime-encrusted stems, and from the foul odor these produce when stepped on. In some treatments, the Characeae includes all the living (extant) species of Charales; this circumscription is followed here. In other treatments, the genus ''Nitellopsis'', which has both extant and extinct species, is placed in a separate family, Feistiellaceae. Description Living members of the Characeae ''sensu lato'' grow in freshwater and brackish environments worldwide, and have large, macroscopic thalli growing up to 120 cm long, they are branched, multicellular, and use chlorophyll to photosynthesize. Their only diploid stage in the life cycle is the unicellular oospore. They may be called ''stoneworts'', because the plants can become encrusted in lime ( calcium carbonate) after some time. The "stem" is actually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charales
Charales is an order of freshwater green algae in the division Charophyta, class Charophyceae, commonly known as stoneworts. Depending on the treatment of the genus ''Nitellopsis'', living (extant) species are placed into either one family ( Characeae) or two (Characeae and Feistiellaceae). Further families are used for fossil members of the order. Linnaeus established the genus '' Chara'' in 1753. Taxonomy The higher level classification of green algae was unsettled . AlgaeBase places Charales within the class Charophyceae and its circumscription of the division Charophyta. Families The number of families and their division into genera varies. , AlgaeBase accepts two families containing some extant species and four families containing only fossil species: * Characeae S.F.Gray * Feistiellaceae Schudack *† Aclistocharaceae X.G.Zhou (may be included in Characeae) *† Atopocharaceae R.E.Peck (may be included in Clavatoraceae) *† Clavatoraceae Pia *† Porocharaceae Grambas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feistiellaceae
Feistiellaceae is a family of freshwater green algae in the order Charales. Genera , AlgaeBase and Fossilworks accepted three genera: *†'' Amblyochara'' Grambast – 6 species *†'' Feistiella'' Schudack – 8 species *''Nitellopsis'' Hy – 24 species With this circumscription, the family as a whole is not extinct, since ''Nitellopsis'' contains living (extant) species, including the widely dispersed ''Nitellopsis obtusa''. Other sources place ''Nitellopsis'' in the family Characeae Characeae is a family of freshwater green algae in the order Charales, commonly known as stoneworts. They are also known as brittleworts or skunkweed, from the fragility of their lime-encrusted stems, and from the foul odor these produce when step ..., leaving Feistiellaceae with only extinct genera. References Charophyta Green algae families {{Green alga-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chara Globularis
Chara may refer to: Places *Chara (rural locality), a rural locality (a ''selo'') in Zabaykalsky Krai, Russia *Chara Airport, an airport in Russia near the rural locality *Chara (river), a river in Russia *Chara Sands, a sanded area in Siberia, Russia Science *Chara (alga), ''Chara'' (alga), a genus of algae in the family Characeae *Chara (moth), ''Chara'' (moth), a genus of moths in the family Noctuidae *CHARA array, a telescope *Beta Canum Venaticorum or Chara, a star *Chara or Southern dogs, a constellation including Beta Canum Venaticorum and Cor Caroli Other uses *Chara (surname) * Chara, a character in the video game ''Undertale'' *Chara (singer), Japanese singer *Chara people, ethnic group in the Southern Nations, Nationalities, and Peoples' Region of Ethiopia *Chara language, the language of the Chara people *USS Chara (AKA-58), USS ''Chara'' (AKA-58), a 1944 Achernar class attack cargo ship *Chara (magazine), ''Chara'' (magazine), a Japanese Yaoi/Shōjo magazine See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitellopsis
''Nitellopsis'' is a genus of Charophyta, charophyte green algae. Some sources, including AlgaeBase, place it in the family Feistiellaceae. Others place it in the family Characeae. Species , AlgaeBase listed the following species: ;Extant *''Nitellopsis obtusa'' *''Nitellopsis sarcularis'' ;Extinct *†''Nitellopsis aemula'' *†''Nitellopsis dutemplei'' *†''Nitellopsis etrusca'' *†''Nitellopsis exilis'' *†''Nitellopsis globula'' *†''Nitellopsis helicteres'' *†''Nitellopsis helvetica'' *†''Nitellopsis houi'' *†''Nitellopsis huangii'' *†''Nitellopsis ixtapensis'' *†''Nitellopsis major'' *†''Nitellopsis merianii'' *†''Nitellopsis morulosa'' *†''Nitellopsis ovalis'' *†''Nitellopsis ovata'' *†''Nitellopsis palaeohungarica'' *†''Nitellopsis sigalii'' *†''Nitellopsis supraplana'' *†''Nitellopsis thaleri'' *†''Nitellopsis usboensis'' *†''Nitellopsis wangii'' *†''Nitellopsis wonnacottii'' References Charophyta Charoph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cytoplasmic Streaming
Cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is the flow of the cytoplasm inside the cell, driven by forces from the cytoskeleton. It is likely that its function is, at least in part, to speed up the transport of molecules and organelles around the cell. It is usually observed in large plant and animal cells, greater than approximately 0.1 mm. In smaller cells, the diffusion of molecules is more rapid, but diffusion slows as the size of the cell increases, so larger cells may need cytoplasmic streaming for efficient function. The green alga genus ''Chara'' possesses some very large cells, up to 10 cm in length, and cytoplasmic streaming has been studied in these large cells. Cytoplasmic streaming is strongly dependent upon intracellular pH and temperature. It has been observed that the effect of temperature on cytoplasmic streaming created linear variance and dependence at different high temperatures in comparison to low temperatures. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitellopsis Obtusa
''Nitellopsis obtusa'' is a large freshwater alga. It is also known by the common name starry stonewort.Minchin, D., Boelens, R. and Roden, C. 2017. The first record of ''Nitellopsis obtusa'' (N.A.Desvaux) J.Groves (Charophycese, Characeae) in Ireland (H9, H10) ''Irish Naturalists' Journal'' 35:(2):105 - 109 This alga grows to a length of over , is bright translucent green and has branches growing in whorls from the main axis the plants easily break up. It is easily distinguished from other charophytes by star-shaped bulbils which permit vegetative reproduction. Description ''Nitellopsis obtusa'' has long, fairly straight branches arranged in whorls, attached at nodes to the stem at an acute angle. Both stem and branches are about in diameter, and the internodal lengths of stem consist of a single cell which may be several centimetres long. Stems may be up to or even longer and form dense masses. When in active growth, the colour is light green. At the base of the main stems, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicaragua
Nicaragua (; ), officially the Republic of Nicaragua (), is the largest country in Central America, bordered by Honduras to the north, the Caribbean to the east, Costa Rica to the south, and the Pacific Ocean to the west. Managua is the country's capital and largest city. , it was estimated to be the second largest city in Central America. Nicaragua's multiethnic population of six million includes people of mestizo, indigenous, European and African heritage. The main language is Spanish. Indigenous tribes on the Mosquito Coast speak their own languages and English. Originally inhabited by various indigenous cultures since ancient times, the region was conquered by the Spanish Empire in the 16th century. Nicaragua gained independence from Spain in 1821. The Mosquito Coast followed a different historical path, being colonized by the English in the 17th century and later coming under British rule. It became an autonomous territory of Nicaragua in 1860 and its northernmost part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilapia
Tilapia ( ) is the common name for nearly a hundred species of cichlid fish from the coelotilapine, coptodonine, heterotilapine, oreochromine, pelmatolapiine, and tilapiine tribes (formerly all were "Tilapiini"), with the economically most important species placed in the Coptodonini and Oreochromini. Tilapia are mainly freshwater fish inhabiting shallow streams, ponds, rivers, and lakes, and less commonly found living in brackish water. Historically, they have been of major importance in artisanal fishing in Africa, and they are of increasing importance in aquaculture and aquaponics. Tilapia can become a problematic invasive species in new warm-water habitats such as Australia, whether deliberately or accidentally introduced, but generally not in temperate climates due to their inability to survive in cold water. Tilapia has been the fourth-most consumed fish in the United States since 2002. The popularity of tilapia came about due to its low price, easy preparation, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ireland
Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Great Britain and Ireland), North Channel, the Irish Sea, and St George's Channel. Ireland is the List of islands of the British Isles, second-largest island of the British Isles, the List of European islands by area, third-largest in Europe, and the List of islands by area, twentieth-largest on Earth. Geopolitically, Ireland is divided between the Republic of Ireland (officially Names of the Irish state, named Ireland), which covers five-sixths of the island, and Northern Ireland, which is part of the United Kingdom. As of 2022, the Irish population analysis, population of the entire island is just over 7 million, with 5.1 million living in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the List of European islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is dominated by a maritime climate with narrow temperature differences between seasons. The 60% smaller island of Ireland is to the west—these islands, along with over 1,000 smaller surrounding islands and named substantial rocks, form the British Isles archipelago. Connected to mainland Europe until 9,000 years ago by a landbridge now known as Doggerland, Great Britain has been inhabited by modern humans for around 30,000 years. In 2011, it had a population of about , making it the world's third-most-populous island after Java in Indonesia and Honshu in Japan. The term "Great Britain" is often used to refer to England, Scotland and Wales, including their component adjoining islands. Great Britain and Northern Ireland now constitute the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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