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Jens Clausen
Jens Christen (Christian) Clausen (March 11, 1891 – November 22, 1969) was a Danish- American botanist, geneticist, and ecologist. He is considered a pioneer in the field of ecological and evolutionary genetics of plants. Biography Clausen was born in Nr. Eskilstrup, Soderup parish on the island of Zealand, Denmark. He was the son of Christen Augustinus Clausen (1858-1938) and Christine (Christensen) Clausen (1856-1933). His parents were farmers and at age 14 he took responsibility for the family farm and was largely educated at home with the assistance of a local school teacher. He studied Mendel's genetics and Darwinian evolutionary theory. In 1913 he entered the University of Copenhagen, where he studied botany, genetics and ecology. Christen Raunkiær suggested he undertake graduate studies and Clausen chose to study the genetics and ecology of the plant family Violaceae. He studied hybridization patterns across a range of environments and described introgression of g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eskilstrup
Eskilstrup is a town some north of Nykøbing Falster on the Danish island of Falster. As of 2024, it had a population of 1,082. History Eskilstrup Church, built in the Romanesque style, dates from the 12th century. In accordance with local tradition, it is painted red. It is best known for its frescos, said to be Denmark's oldest. The town has grown up around Eskilstrup railway station, which opened together with the Falster Railway in 1872. The earliest buildings included businesses and hotels close to the station on the main street. The railway is now called the South Line, with frequent train stops at Eskilstrup. The town today Eskilstrup is conveniently located close to the E47 motorway from Copenhagen to Rødby Havn. It is also served by Eskilstrup railway station, located on the South Line which links Copenhagen with the islands of Falster and Lolland. Facilities include a school, sports hall, day nursery, food store, and hotel. There are beech woods in the surr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botany
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] |
Carnegie Institution Of Washington
The Carnegie Institution for Science, also known as Carnegie Science and the Carnegie Institution of Washington, is an organization established to fund and perform scientific research in the United States. This institution is headquartered in Washington, D.C. , the Institution's endowment was valued at $926.9 million. In 2018, the expenses for scientific programs and administration were $96.6 million. American astrophysicist John Mulchaey is the current president of the institution. Name More than 20 independent organizations were established through the philanthropy of Andrew Carnegie and feature his surname. In 2024, the "Carnegie Institution for Science" officially adopted the name "Carnegie Science", a name which has been used informally since 2007 when they first changed the name from "Carnegie Institution of Washington" to "Carnegie Institution for Science". History It is proposed to found in the city of Washington, an institution which ... shall in the broad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Species
In biogeography, a native species is indigenous to a given region or ecosystem if its presence in that region is the result of only local natural evolution (though often popularised as "with no human intervention") during history. The term is equivalent to the concept of indigenous or autochthonous species. A wild organism (as opposed to a domestication, domesticated organism) is known as an introduced species within the regions where it was Human impact on the environment#anthropogenic, anthropogenically introduced. If an introduced species causes substantial ecological, environmental, and/or economic damage, it may be regarded more specifically as an invasive species. A native species in a location is not necessarily also endemism, endemic to that location. Endemic species are ''exclusively'' found in a particular place. A native species may occur in areas other than the one under consideration. The terms endemic and native also do not imply that an organism necessarily first o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an international border with the Mexico, Mexican state of Baja California to the south. With almost 40million residents across an area of , it is the List of states and territories of the United States by population, largest state by population and List of U.S. states and territories by area, third-largest by area. Prior to European colonization of the Americas, European colonization, California was one of the most culturally and linguistically diverse areas in pre-Columbian North America. European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire. The area became a part of Mexico in 1821, following Mexican War of Independence, its successful war for independence, but Mexican Cession, was ceded to the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecological Genetics
Ecological genetics is the study of genetics in natural populations. It combines ecology, evolution, and genetics to understand the processes behind adaptation. It is virtually synonymous with the field of molecular ecology. This contrasts with classical genetics, which works mostly on crosses between laboratory strains, and DNA sequence analysis, which studies genes at the molecular level. Research in this field is on traits of ecological significance—traits that affect an organism's fitness, or its ability to survive and reproduce. Examples of such traits include flowering time, drought tolerance, polymorphism, mimicry, and avoidance of attacks by predators.Ruxton G.D. Sherratt T.N. and Speed M.P. 2004. ''Avoiding attack: the evolutionary ecology of crypsis, warning signals & mimicry''. Oxford University Press. Research usually involves a mixture of field and laboratory studies. Samples of natural populations may be taken back to the laboratory for their genetic varia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvey Monroe Hall
Harvey Monroe Hall (March 29, 1874 – March 11, 1932) was an American botanist particularly noted for his taxonomic work in the western United States. Hall was born in Lee County, Illinois, on March 29, 1874, and raised near Riverside, California. He studied botany at the University of California, earning a B.S. in 1901, M.S. in 1902, and Ph.D. in 1906. In 1910, he married fellow University of California graduate Carlotta Case. Their daughter Martha was born in 1916. He died while in Washington, DC for a conference on March 11, 1932. Career and research University of California Studying plant taxonomy under W. L. Jepson at the University of California, Hall completed his doctoral dissertation, ''The Compositae of Southern California'', in 1906. He went on to be a professor of botany at the university and botanist for the agricultural experiment station. His early work focused on taxonomic studies of plants in California, and he added over 200,000 specimens to the herbarium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crepis
''Crepis'', commonly known in some parts of the world as hawksbeard or hawk's-beard (but not to be confused with the related genus ''Hieracium'' with a similar common name), is a genus of annual and perennial flowering plants of the family Asteraceae superficially resembling the dandelion, the most conspicuous difference being that ''Crepis'' usually has branching scapes with multiple heads (though solitary heads can occur). The genus name ''Crepis'' derives from the Greek ''krepis'', meaning "slipper" or "sandal", possibly in reference to the shape of the fruit.''Crepis''. Flora of North America. The genus is distributed throughout the and |
University Of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after the Anglo-Irish philosopher George Berkeley, it is the state's first land-grant university and is the founding campus of the University of California system. Berkeley has an enrollment of more than 45,000 students. The university is organized around fifteen schools of study on the same campus, including the UC Berkeley College of Chemistry, College of Chemistry, the UC Berkeley College of Engineering, College of Engineering, UC Berkeley College of Letters and Science, College of Letters and Science, and the Haas School of Business. It is Carnegie Classification of Institutions of Higher Education, classified among "R1: Doctoral Universities – Very high research activity". Lawrence Berkeley National Laboratory was originally founded as par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Veterinary And Agricultural University
The Royal Veterinary and Agricultural University (, abbr. KVL, , abbr. RVA) was a veterinary and agricultural science university in Denmark. It was founded in 1856 and operated until 2007, when it became a part of the University of Copenhagen. It had its headquarters in Frederiksberg, Copenhagen. History The university was founded in 1856. Its main building was inaugurated in 1858. The Royal Veterinarian School moved from Sankt Annæ Gade into the main building after its inauguration. On January 1, 2007, the Royal Veterinary and Agricultural University (RVA University) was merged into the University of Copenhagen and was renamed as the Faculty of Life Sciences. This was later split up, with the veterinary part merging into the Faculty of Health and Medical Sciences and the rest merging into the Faculty of Science. Locations Main campus The original three-winged main building (with the pergola) on Bülowsvej 17 was built between 1856 and 1858 and was designed by Gottlieb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introgression
Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression is a long-term process, even when artificial; it may take many hybrid generations before significant backcrossing occurs. This process is distinct from most forms of gene flow in that it occurs between two populations of different species, rather than two populations of the same species. Introgression also differs from simple Hybridization (biology), hybridization. Simple hybridization results in a relatively even mixture; gene and allele frequencies in the first generation will be a uniform mix of two parental species, such as that observed in mules. Introgression, on the other hand, results in a complex, highly variable mixture of genes, and may only involve a minimal percentage of the donor genome. Definition Introgression or i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Violaceae
Violaceae is a family of flowering plants established in 1802, consisting of about 1000 species in about 25 genera. It takes its name from the genus '' Viola'', the violets and pansies. Older classifications such as the Cronquist system placed the Violaceae in an order named after it, the Violales or the Parietales. However, molecular phylogeny studies place the family in the Malpighiales as reflected in the Angiosperm Phylogeny Group (APG) classification, with 41 other families, where it is situated in the parietal clade of 11 families. Most of the species are found in three large genera, '' Viola'', '' Rinorea'' and '' Hybanthus''. The other genera are largely monotypic or oligotypic. The genera are grouped into four clades within the family. The species are largely tropical or subtropical but ''Viola'' has a number of species in temperate regions. Many genera have a very restricted distribution. Description Though the best-known genus, ''Viola'', is herbaceous, mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
