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Richard Levins
Richard "Dick" Levins (June 1, 1930 – January 19, 2016) was an ex-tropical farmer turned ecologist, a population geneticist, biomathematician, mathematical ecologist, and philosopher of science who researched diversity in human populations. Until his death, Levins was a university professor at the Harvard T.H. Chan School of Public Health and a long-time political activist. He was best known for his work on evolution and complexity in changing environments and on metapopulations. Levins also had written on philosophical issues in biology and modelling. One of his influential articles is "The Strategy of Model Building in Population Biology". He has influenced a number of contemporary philosophers of biology. Levins often boasted publicly that he was a 'fourth generation Marxist' and often had said that the methodology in his ''Evolution in Changing Environments'' was based upon the introduction to Marx's ''Grundrisse'', the author's notes (not published until 1939) for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brooklyn
Brooklyn () is a borough of New York City, coextensive with Kings County, in the U.S. state of New York (state), New York. Kings County is the most populous Administrative divisions of New York (state)#County, county in the State of New York, and the County statistics of the United States#Most densely populated, second-most densely populated county in the United States, behind New York County (Manhattan). Brooklyn is also New York City's most populous borough,2010 Gazetteer for New York State United States Census Bureau. Retrieved September 18, 2016. with 2,736,074 residents in 2020. Named after the Dutch village of Breukelen, Brooklyn is located on the western portion of Long Island and shares a border with the borough of Queens. It has several bridge an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Genetics
Population genetics is a subfield of genetics that deals with genetic differences within and between populations, and is a part of evolutionary biology. Studies in this branch of biology examine such phenomena as adaptation, speciation, and population structure. Population genetics was a vital ingredient in the emergence of the modern evolutionary synthesis. Its primary founders were Sewall Wright, J. B. S. Haldane and Ronald Fisher, who also laid the foundations for the related discipline of quantitative genetics. Traditionally a highly mathematical discipline, modern population genetics encompasses theoretical, laboratory, and field work. Population genetic models are used both for statistical inference from DNA sequence data and for proof/disproof of concept. What sets population genetics apart from newer, more phenotypic approaches to modelling evolution, such as evolutionary game theory and adaptive dynamics, is its emphasis on such genetic phenomena as dominance, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Diversity
Genetic diversity is the total number of Genetics, genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species. It is distinguished from ''genetic variability'', which describes the tendency of genetic characteristics to vary. Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that allele. The population will continue for more generations because of the success of these individuals. The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral subs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philosopher Of Science
A philosopher is a person who practices or investigates philosophy. The term ''philosopher'' comes from the grc, φιλόσοφος, , translit=philosophos, meaning 'lover of wisdom'. The coining of the term has been attributed to the Greek thinker Pythagoras (6th century BCE).. In the classical sense, a philosopher was someone who lived according to a certain way of life, focusing upon resolving existential questions about the human condition; it was not necessary that they discoursed upon theories or commented upon authors. Those who most arduously committed themselves to this lifestyle would have been considered ''philosophers''. In a modern sense, a philosopher is an intellectual who contributes to one or more branches of philosophy, such as aesthetics, ethics, epistemology, philosophy of science, logic, metaphysics, social theory, philosophy of religion, and political philosophy. A philosopher may also be someone who has worked in the humanities or other sciences which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecologist
Ecology () is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere level. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and it is not synonymous with environmentalism. Among other things, ecology is the study of: * The abundance, biomass, and distribution of organisms in the context of the environment * Life processes, antifragility, interactions, and adaptations * The movement of materials and energy through living communities * The successional development of ecosystems * Cooperation, competition, and predation within and between species * Patterns of biodiversity and its effect on ecosystem processes Ecology has practical applications in conservation biology, wetland management, natural resource management ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maricao, Puerto Rico
Maricao () is a town and the second-least populous municipality of Puerto Rico; it is located at the western edge of the Cordillera Central. It is a small town set around a small square in hilly terrain, north of San Germán, Sabana Grande and Yauco; south of Las Marías and Lares, southeast of Mayagüez, and west of Adjuntas. Maricao is spread over 6 barrios and Maricao Pueblo (the downtown area and the administrative center of the city). The town borders the Maricao Fish Hatchery, a fish hatchery made up of tanks and pools in a garden setting, where some 25,000 fish are raised yearly to stock farm fishponds and island lakes. The hatchery is part of the Maricao State Forest, also known as Monte del Estado. Though of dryer vegetation than the other mountain forest, Maricao is home to large number of bird species. Its stone observation tower provides far-flung views to the coast and the Mona Passage. Maricao has a 2020 census population of 4,455. History Maricao was fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aurora Levins Morales
Aurora Levins Morales (born February 24, 1954) is a Puerto Rican Jewish writer and poet. She is significant within Latina feminism and Third World feminism as well as other social justice movements. Biography Early life and education Levins Morales was born February 24, 1954, in Indiera Baja, a barrio of Maricao, Puerto Rico. Her mother, Rosario Morales, was a Harlem-born Puerto Rican writer. Her father, Richard Levins, who was Brooklyn born of Ukrainian-Jewish heritage, was an ecologist, a population geneticist, a mathematical ecologist who researched diversity in human populations, and John Rock Professor of Population Sciences and head of the Human Ecology program of thDepartment of Global Health and Populationof the Harvard T.H. Chan School of Public Health in Boston, Massachusetts. He was a member of the US and Puerto Rican Communist Parties, the Movimiento Pro Independencia (the Independence movement in Puerto Rico), and the Puerto Rican Socialist Party, and he wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Wood Johnson Foundation
The Robert Wood Johnson Foundation (RWJF) is an American philanthropic organization. It is the largest one focused solely on health. Based in Princeton, New Jersey, the foundation focuses on access to health care, public health, health equity, leadership and training, and changing systems to address barriers to health. RWJF has been credited with helping to develop the 911 emergency system, reducing tobacco use among Americans, lowering rates of unwanted teenage pregnancies, and improving perceptions of hospice care. The Robert Wood Johnson Foundation: supports the development of programs that can be used in community-led initiatives or by government bodies; funds research through surveys and polls; and makes impact investments. According to '' Pensions & Investments'' and Foundation Center, the foundation was the fifth-largest in the U.S. in investment assets, as of 2015. As of 2020, the value of its endowment was $13 billion. History The Robert Wood Johnson Foundatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuban Academy Of Sciences
The Cuban Academy of Sciences (''Academia de Ciencias de Cuba'') is an official institution of the Cuban state, with headquarters in the National Capitol building in Havana. It is described as the oldest active national academy of sciences outside Europe. The Academy is with a national scope, independent and consultative in the area of science, and the successor of the former Royal Academy of Medicine, Physical and Natural Sciences of Havana, and is also attached to the Ministry of Science, Technology and the Environment. The Academy represents the fields of Agrarian and Fisheries Sciences, Biomedical Sciences, Exact, and Natural Sciences, Social Sciences and Humanities, and Technical Sciences. Its members are nominated by scientific research institutions, universities, scientific societies as well as various other national organizations. History Cuba's first Academy of Sciences was founded by decree of Queen Isabella II of Spain on May 19, 1861, as the Royal Academy of Medical, P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metapopulation
A metapopulation consists of a group of spatially separated populations of the same species which interact at some level. The term metapopulation was coined by Richard Levins in 1969 to describe a model of population dynamics of insect pests in agricultural fields, but the idea has been most broadly applied to species in naturally or artificially fragmented habitats. In Levins' own words, it consists of "a population of populations". A metapopulation is generally considered to consist of several distinct populations together with areas of suitable habitat which are currently unoccupied. In classical metapopulation theory, each population cycles in relative independence of the other populations and eventually goes extinct as a consequence of demographic stochasticity (fluctuations in population size due to random demographic events); the smaller the population, the more chances of inbreeding depression and prone to extinction. Although individual populations have finite life-span ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuba
Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Cuba is located east of the Yucatán Peninsula (Mexico), south of both the American state of Florida and the Bahamas, west of Hispaniola (Haiti/Dominican Republic), and north of both Jamaica and the Cayman Islands. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camagüey. The official area of the Republic of Cuba is (without the territorial waters) but a total of 350,730 km² (135,418 sq mi) including the exclusive economic zone. Cuba is the second-most populous country in the Caribbean after Haiti, with over 11 million inhabitants. The territory that is now Cuba was inhabited by the Ciboney people from the 4th millennium BC with the Gua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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