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Frederik Børgesen
Fredrik Christian Emil Børgesen (1 January 1866 in Copenhagen – 22 March 1956 in Frederiksberg) was a Danish botanist and phycologist. He graduated in botany from the University of Copenhagen and was subsequently employed as an assistant at the Botanical Museum (1893–1900). His doctoral thesis dealt with the marine algae of the Faroe Islands (1904). Later, he became librarian at the Library of the Botanical Garden (1900–1935). Børgesen made investigations of marine algae e.g. around India, Mauritius, the Canary Islands and the Antilles. Many species have been named to his honour, e.g. '' Coccoloba borgesenii'' (Polygonaceae) and numerous algae, e.g. '' Hypnea boergesenii'' ( Hypneaceae) and ''Padina boergesenii'' (Phaeophyceae). Selected publications * Børgesen, F. & Paulsen, O. (1898) ''Om Vegetationen paa De dansk-vestindiske Øer''. København: Nordisk Forlag. 114 pp. *:The work is a result of studies conducted during the expedition to Venezuela and the Antilles o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copenhagen
Copenhagen ( or .; da, København ) is the capital and most populous city of Denmark, with a proper population of around 815.000 in the last quarter of 2022; and some 1.370,000 in the urban area; and the wider Copenhagen metropolitan area has 2,057,142 people. Copenhagen is on the islands of Zealand and Amager, separated from Malmö, Sweden, by the Øresund strait. The Øresund Bridge connects the two cities by rail and road. Originally a Viking fishing village established in the 10th century in the vicinity of what is now Gammel Strand, Copenhagen became the capital of Denmark in the early 15th century. Beginning in the 17th century, it consolidated its position as a regional centre of power with its institutions, defences, and armed forces. During the Renaissance the city served as the de facto capital of the Kalmar Union, being the seat of monarchy, governing the majority of the present day Nordic region in a personal union with Sweden and Norway ruled by the Danis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algae
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botany Of The Faeroes
{{Use dmy dates, date=January 2022 ''Botany of the Færöes (based upon Danish investigations)'' – a three-volume classic scientific work on flora and vegetation of the Faroe Islands, including fungi, lichens, algae, bryophytes and vascular plants. It was published 1901 to 1908 and funded by the Carlsberg Foundation. The project was initiated by Eugen Warming, who edited the content. The published work was based on investigations made chiefly between 1895 and 1900 by F. Børgesen, C. Jensen, C.H. Ostenfeld, J. Hartz, H. Jónsson and Eug. Warming. Warming, E. ed. (1901-1908) ''Botany of the Færöes'' (based upon Danish investigations), vol. I-III. Contents *Part I (1901), pp. 1–338. Det nordiske Forlag, Copenhagen & John Wheldon & Co., LondonFull text** Warming, E.; Historical notes on the botanical investigations of the Færöes. pp. 1–5. ** Ostenfeld, C.H.; Geography and topography. pp. 6–19. ** Ostenfeld, C.H.; Industrial conditions. pp. 20– ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Biology
Marine biology is the scientific study of the biology of marine life, organisms in the sea. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy. A large proportion of all life on Earth lives in the ocean. The exact size of this ''large proportion'' is unknown, since many ocean species are still to be discovered. The ocean is a complex three-dimensional world covering approximately 71% of the Earth's surface. The habitats studied in marine biology include everything from the tiny layers of surface water in which organisms and abiotic items may be trapped in surface tension between the ocean and atmosphere, to the depths of the oceanic trenches, sometimes 10,000 meters or more beneath the surface of the ocean. Specific habitats include estuaries, coral reefs, kelp forests, seagrass meadows, the surrounds of seamounts and therm ... [...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] |
Psammophyte
A psammophyte is a plant that grows in sandy and often unstable soils. Psammophytes are commonly found growing on beaches, deserts, and sand dunes. Because they thrive in these challenging or inhospitable habitats, psammophytes are considered extremophiles, and are further classified as a type of psammophile. Etymology The word "psammophyte" consists of two Greek roots, ''psamm-'', meaning "sand", and ''-phyte'', meaning "plant". The term "psammophyte" first entered English in the early twentieth century via German botanical terminology. Description Psammophytes are found in many different plant families, so may not share specific morphological or phytochemical traits. They also come in a variety of plant life-forms, including ephemeral plant, annual ephemerals, perennials, subshrubs, Raunkiær plant life-form#Hemicryptophytes, hemicryptophytes, and many others. What the many diverse psammophytes have in common is a resilience to harsh or rapidly fluctuating environmental facto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halophyte
A halophyte is a salt-tolerant plant that grows in soil or waters of high salinity, coming into contact with saline water through its roots or by salt spray, such as in saline semi-deserts, mangrove swamps, marshes and sloughs and seashores. The word derives from Ancient Greek ἅλας (halas) 'salt' and φυτόν (phyton) 'plant'. Halophytes have different anatomy, physiology and biochemistry than glycophytes.Physiology of halophytes, T. J. FLOWERS, Plant and Soil 89, 41-56 (1985) An example of a halophyte is the salt marsh grass ''Spartina alterniflora'' (smooth cordgrass). Relatively few plant species are halophytes—perhaps only 2% of all plant species. Information about many of the earth's halophytes can be found in thehalophdatabase. The large majority of plant species are glycophytes, which are not salt-tolerant and are damaged fairly easily by high salinity. Classification Halophytes can be classified in many ways. According to Stocker (1933), it is mainly of 3 kin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in the Caribbean Sea. It has a territorial extension of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas. The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. The Venezuelan government maintains a claim against Guyana to Guayana Esequiba. Venezuela is a federal presidential republic consisting of 23 states, the Capital District and federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of the n ... [...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] |
Danish West Indies
The Danish West Indies ( da, Dansk Vestindien) or Danish Antilles or Danish Virgin Islands were a Danish colonization of the Americas, Danish colony in the Caribbean, consisting of the islands of Saint Thomas, U.S. Virgin Islands, Saint Thomas with ; Saint John, U.S. Virgin Islands, Saint John ( da, St. Jan) with ; and Saint Croix with . The islands have belonged to the United States since they were Treaty of the Danish West Indies, purchased in 1917. Water Island, U.S. Virgin Islands, Water Island was part of the Danish West Indies until 1905, when the Danish state sold it to the East Asiatic Company, a private shipping company. The Danish West India Company, Danish West India-Guinea Company annexed uninhabited St. Thomas in 1672; annexed St. John in 1718; and bought St. Croix from France (King Louis XIV) on June 28, 1733. When the Danish West India-Guinea Company went bankruptcy, bankrupt in 1754, Frederik V of Denmark, King Frederik V of Denmark–Norway assumed direct cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ove Paulsen
Ove Vilhelm Paulsen (22 March 1874 – 29 April 1947) was a Danish botanist. Biography Paulsen was born at Aarhus, Denmark. He studied at the University of Copenhagen under professor Eugen Warming (1841-1924). Paulsen was a keeper at the Botanical Museum of the University of Copenhagen from 1905 to 1920, when he became professor of botany at the Pharmaceutical College in Copenhagen, a position he held until 1947. He studied the flora of Denmark, plankton of the North Atlantic and the flora of Central Asia. He went on expeditions to Northern Persia and Pamir as early as 1898–1899. During his travels through Pamir, he was accompanied by the Danish explorer Ole Olufsen (1865–1929). Ove Paulsen visited North America with the second International Phytogeographic Excursion from July to September 1913 and subsequently described the biome zonation from east to west in a paper.Paulsen, Ove (1915) Some remarks on the Desert Vegetation of America. The Plant World 18: 155-161. The p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phaeophyceae
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, ''Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
