Helgi Jónsson

	Helgi Jónsson Helgi Jónsson (11 April 1867, Rangárvallasýsla – 1925) was an Icelandic botanist and phycologist. He specialized in the research of marine algae and subarctic vegetation. During his career, he undertook many botanical trips throughout Iceland. The diatom A diatom (Neo-Latin ''diatoma'') is any member of a large group comprising several Genus, genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of Earth's B ... '' Navicula jonssonii'' Østrup is named after him. Main works * ''The marine algae of Iceland''. '' Botanisk Tidsskrift'' 25: 378–380. 1902–1903. * ''The marine algae of East Greenland''. '' Meddelelser om Grønland'' 30: 1-73. 1904. * ''The marine algal vegetation of Iceland''. 1912 '' The Botany of Iceland'' References Helgi Jonsson 1867 births 1925 deaths Phycologists {{Iceland-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Rangárvallasýsla Iceland was historically divided into 23 counties known as ''sýslur'' (), and 23 independent towns known as ''kaupstaðir'' (). Iceland is now split up between 24 sýslumenn (magistrates) that are the highest authority over the local police (except in Reykjavík where there is a special office of police commissioner) and carry out administrative functions such as declaring bankruptcy and marrying people outside of the church. The jurisdictions of these magistrates often follow the lines of the historical counties, but not always. When speaking of these new "administrative" counties, the custom is to associate them with the county seats rather than using the names of the traditional counties, even when they cover the same area. Composition Independent towns (''kaupstaðir'') were first created in the 18th century as urbanisation began in Iceland; this practice continued into the 1980s. The last town that was declared an independent town was Ólafsvík in 1983. Since then, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Botanist Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who specialises in this field. "Plant" and "botany" may be defined more narrowly to include only land plants and their study, which is also known as phytology. Phytologists or botanists (in the strict sense) study approximately 410,000 species of Embryophyte, land plants, including some 391,000 species of vascular plants (of which approximately 369,000 are flowering plants) and approximately 20,000 bryophytes. Botany originated as history of herbalism#Prehistory, prehistoric herbalism to identify and later cultivate plants that were edible, poisonous, and medicinal, making it one of the first endeavours of human investigation. Medieval physic gardens, often attached to Monastery, monasteries, contained plants possibly having medicinal benefit. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Phycology Phycology () is the scientific study of algae. Also known as algology, phycology is a branch of life science. Algae are important as primary producers in aquatic ecosystems. Most algae are eukaryotic, photosynthetic organisms that live in a wet environment. They are distinguished from the higher plants by a lack of true roots, stems or leaves. They do not produce flowers. Many species are single-celled and microscopic (including phytoplankton and other microalgae); many others are multicellular to one degree or another, some of these growing to large size (for example, seaweeds such as kelp and '' Sargassum''). A number of microscopic algae also occur as symbionts in lichens. Phycologists typically focus on either freshwater or ocean algae, and further within those areas, either diatoms or soft algae. History of phycology While both the ancient Greeks and Romans knew of algae, and the ancient Chinese even cultivated certain varieties as food, the scientific study of alg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Marine Algae Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (other) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * Marine life * Marine pollution Military * Marines, a naval-based infantry force United States Marine Corps Royal Marines of the UK Brazilian Marine Corps Spanish Marine Infantry Fusiliers marins (France) Indonesian Marine Corps Republic of China Marine Corps Republic of Korea Marine Corps ** Royal Thai Marine Corps "Marine" also means "navy" in several languages: * Austro-Hungarian Navy () Belgian Navy (, , ) Royal Canadian Navy () * Provincial Marine (1796–1910), a predecessor to the Royal Canadian Navy Navy of the Democratic Republic of the Congo () Royal Danish Navy () Finnish Navy (, ) French Navy () Gabonese Navy () German Navy () Royal Moroccan Navy () Royal Netherlands ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
picture info	Diatom A diatom (Neo-Latin ''diatoma'') is any member of a large group comprising several Genus, genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of Earth's Biomass (ecology), biomass. They generate about 20 to 50 percent of the oxygen produced on the planet each year, take in over 6.7 billion tonnes of silicon each year from the waters in which they live, and constitute nearly half of the organic material found in the oceans. The Protist shell, shells of dead diatoms are a significant component of marine sediment, 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 fresh-water lakes. Diatoms are unicellular organisms: they occur either as solitary cells or in Colony (biology), colonies, which can take the shape of ribb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Navicula Jonssonii ''Navicula'' is a genus of boat-shaped diatom (single-celled photosynthetic organisms), comprising over 1,200 species, though many ''Navicula'' species likely do not belong in the genus strictly speaking. ''Navicula'' is Latin for "small ship", and also a term in English for a boat-shaped incense-holder.Oxford English Dictionary, "Navicula. 3" ''Navicula'' is a cosmopolitan genus and species are present in both freshwater and marine environments, typically attached to surfaces (i.e. benthic). Description ''Navicula'' species are pennate diatoms. Their valves are typically elliptical, though some species have more pinched ends than others. ''Navicula'' cells have two chloroplasts, one along each side of the valve along the girdle bands. Mobility ''Navicula'' diatoms are highly motile and move through a gliding movement This is done through excretion of extracellular polymeric substances (EPS). One form of EPS surrounds the outside of the cell and another is excreted through a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ernst Østrup Ernst Vilhelm Østrup (21 September 1845, in Roskilde – 16 April 1917, in Frederiksberg) was a Danish botanist and phycologist, mainly working on diatoms. In 1873 he received his ''cand. polyt.'' degree, and later worked as a schoolteacher in Copenhagen. His diatom research largely dealt with species found in Denmark, Greenland, Iceland, Faeroe Islands and Jan Mayen. The diatom genus ''Oestrupia'' (Heiden) and the species ''Diploneis oestrupii'' ( Hust.), ''Surirella oestrupii'' ( Gran) and ''Navicula oestrupii'' ( Cleve) are all named in his honour. Selected scientific works * ''Ferskvands-Diatoméer fra Øst-Grønland''. Meddelelser om Grønland 15: 251–290. 1898. * ''Beiträge zur Kenntnis der Diatomeenflora des Kossogolbeckens in der nordwestlichen Mongolei''. Hedwigia 48 (1-2): 74–100. 1909. * Danske Diatoméer'. C.A. Reitzel, København Copenhagen ( ) is the capital and most populous city of Denmark, with a population of 1.4 million in the Urban area of C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Botanisk Tidsskrift ''Botanisk Tidsskrift'' (standard abbreviation ''Bot. Tidsskr.'') was a Danish mixed scientific and amateur journal concerning botany, issued in Copenhagen by the Danish Botanical Society. It was published from 1866 to 1980, when it fused with '' Botaniska Notiser'', '' Friesia'' and '' Norwegian Journal of Botany'' to form the '' Nordic Journal of Botany''. Monographs were published in a parallel series, '' Dansk Botanisk Arkiv''. Full digital text of ''Botanisk Tidsskrift'' is available at Biodiversity Heritage Library.and full text access is at DanBIF. References External links Botanisk Tidsskriftat HathiTrust Digital Library Botanisk Tidsskriftat Biodiversity Heritage Library The Biodiversity Heritage Library (BHL) is the world’s largest open-access digital library for biodiversity literature and archives. BHL operates as a worldwide consortium of natural history, botanical, research, and national libraries working ... Botanisk Tidsskriftat Botanical Scientific Jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Meddelelser Om Grønland ''Meddelelser om Grønland'' ("''Communications on Greenland''") is a Danish scientific journal, scientific periodical which publishes scientific results from all fields of research on Greenland. It was established by Frederik Johnstrup and published as a single series by the Commission for Scientific Investigations in Greenland from 1878 to 1979, with contributions in Danish, German, English or French. In 1979, following the issue of vol. 206, the series was split up into three individually numbered subseries, all published in English: ''Bioscience'', ''Geoscience'', and ''Man & Society''. When publication of the series was handed over to Museum Tusculanum Press in 2008, the original name was revived, now with the official English title ''Monographs on Greenland'', and the volumes which had appeared between 1979 and 2008 were retroactively numbered in the revived main series (nos. 207–345). As of vol. 346, all publications carry dual numbering. References External links ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]