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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. Google Books Main works * ''The marine algae of Iceland''. 25: 378–380. 1902–1903. * ''The marine algae of East Greenland''. |
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, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botanist
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (''botanē'') meaning "pasture", " herbs" "grass", or " fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – edible, med ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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''). Phycology includes the study of prokaryotic forms known as blue-green algae or cyanobacteria. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Algae
Marine primary production is the chemical synthesis in the ocean of organic compounds from atmospheric or dissolved carbon dioxide. It principally occurs through the process of photosynthesis, which uses light as its source of energy, but it also occurs through chemosynthesis, which uses the oxidation or reduction of inorganic chemical compounds as its source of energy. Almost all life on Earth relies directly or indirectly on primary production. The organisms responsible for primary production are called primary producers or autotrophs. Most marine primary production is generated by a diverse collection of marine microorganisms called algae and cyanobacteria. Together these form the principal primary producers at the base of the ocean food chain and produce half of the world's oxygen. Marine primary producers underpin almost all marine animal life by generating nearly all of the oxygen and food marine animals need to exist. Some marine primary producers are also ecosystem en ... [...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 Libraryand 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 worldwide consortiumof natural history, botanical, research, and national libraries working toge ... Botanisk Tidsskriftat Botanical Scientific Journals Magazines established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meddelelser Om Grønland
''Meddelelser om Grønland'' ("''Communications on Greenland''") is a Danish 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 Museum Tusculanum Press (Danish: ''Museum Tusculanums Forlag'') is an independent academic press historically associated with the University of Copenhagen, publishing mainly in the humanities, social sciences and theology. It was founded in 1975 as ... in 2008, the original name was revived, now with the official English title ''Monographs o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Botany Of Iceland
''The Botany of Iceland'' is a five-volume classic scientific work on flora and vegetation of Iceland. It includes fungi, lichen, algae, bryophytes, and vascular plants. History It was published 1912 to 1949 and funded by the Carlsberg Foundation. The project was initiated by Eugenius Warming and Lauritz Kolderup Rosenvinge, who edited the first three volumes, but it was continued after their deaths. Volumes * Volume 1 (1912–18), edited by Lauritz Kolderup Rosenvinge and Eugenius Warming, J. Frimodt, Copenhagen, and John Wheldon and Co., London. ** Part I *** 1. Helgi Jónsson (1912) The marine algal vegetation of Iceland'. pp. 1–186. *** 2. Þorvaldur Thoroddsen (1914) An account of the physical geography of Iceland'. pp. 187–344. ** Part II *** 3. Ernst Østrup (1916) Marine diatoms from the coasts of Iceland'. pp. 345–394. *** 4. August Hesselbo (1918) The bryophyta of Iceland'. pp. 395–677. * Volume 2 (1918–20), edited by Lauritz Kolderup Rosenvinge and Eugenius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lauritz Kolderup Rosenvinge
Janus Lauritz Andreas Kolderup Rosenvinge, generally cited as Lauritz Kolderup Rosenvinge (7 November 1858 – 1939) was a Danish botanist and phycologist. Kolderup Rosenvinge received his Ph.D. in 1888 from the University of Copenhagen. He was docent of botany at the polytechnic (Polyteknisk Læreanstalt) from 1900; and professor of botany at the University of Copenhagen from 1916, focusing on spore plants . He undertook investigations of algae in Danish waters and in the North Atlantic. 2 types of alga genus ''Rosenvingea'' and ''Rosenvingiella'' , which is a genus of green algae in the family Prasiolaceae, have been named in his honour. References External link Danish phycologists Botanists with author abbreviations Botanists active in the Arctic 20th-century Danish botanists Danish marine biologists Danish scientists Academic staff of the University of Copenhagen University of Copenhagen alumni Rosenvinge family 1858 births 1939 deaths 19th-century Danish botani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugenius Warming
Eugenius (died 6 September 394) was a usurper in the Western Roman Empire (392–394) against Emperor Theodosius I. While Christian himself, Eugenius capitalized on the discontent in the West caused by Theodosius' religious policies targeting pagans. He renovated the pagan Temple of Venus and Roma and restored the Altar of Victory, after continued petitions from the Roman Senate. Eugenius replaced Theodosius' administrators with men loyal to him, including pagans. This revived the pagan cause. His army fought the army of Theodosius at the Battle of the Frigidus, where Eugenius was captured and executed. Life A Christian and former teacher of grammar and rhetoric, as well as ''magister scriniorum'', Eugenius was an acquaintance of Arbogast, the ''magister militum''. Arbogast was of Frankish origin and ''de facto'' ruler of the western portion of the Empire. Rise to power Following the death of Valentinian II, Eugenius was elevated to ''augustus'' on 22 August 392 at Lyons, by ... [...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] |
Ernst Østrup
Ernst Vilhelm Østrup (21 September 1845, in Roskilde – 16 April 1917, in Frederiksberg) was a Denmark, Danish botanist and phycology, 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'' (Friedrich Hustedt, Hust.), ''Surirella oestrupii'' (Haaken Hasberg Gran, Gran) and ''Navicula oestrupii'' (Per Teodor Cleve, 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, Copenhagen, København. 323 pp. (1910) * ''Diatoms from North-east G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icelandic Botanists
Icelandic refers to anything of, from, or related to Iceland and may refer to: *Icelandic people *Icelandic language *Icelandic alphabet *Icelandic cuisine See also * Icelander (other) * Icelandic Airlines, a predecessor of Icelandair * Icelandic horse, a breed of domestic horse * Icelandic sheep, a breed of domestic sheep * Icelandic Sheepdog, a breed of domestic dog * Icelandic cattle Icelandic cattle ( is, íslenskur nautgripur ) are a breed of cattle native to Iceland. Cattle were first brought to the island during the Settlement of Iceland a thousand years ago. Icelandic cows are an especially colorful breed with a wide v ..., a breed of cattle * Icelandic chicken, a breed of chicken {{disambig Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
