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Picobiliphyte
Picozoa, Picobiliphyta, Picobiliphytes, or Biliphytes are protists of a phylum of marine unicellular heterotrophic eukaryotes with a size of less than about 3 micrometers. They were formerly treated as Eukaryote, eukaryotic algae and the smallest member of photosynthetic picoplankton before it was discovered they do not perform photosynthesis. The first species identified therein is ''Picomonas judraskeda''. They probably belong in the Archaeplastida as sister of the Rhodophyta. They were formerly placed within the cryptomonads-haptophytes assemblage. Discovery At the end of the 1990s the European project "Picodiv" clarified which organisms occur in picoplankton. In addition, for a period of two years, samples were taken in the Atlantic, in the Mediterranean, before the coast of Scotland, Alaska and Norway. Picobiliphyta were found particularly within the nutrient-poor ranges from cold coastal seas, where they can constitute up to 50 percent of the Biomass (ecology), biomass. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linda Medlin
Linda Karen Medlin is a molecular biologist known for her work on diatoms. She is an elected member of the Norwegian Academy of Science and Letters. Education and career Medlin has a B.S. from the University of Texas at Austin (1970), and an M.S. (1977) and a Ph.D.(1983) from Texas A&M University. She has worked at the Alfred-Wegener-Institute in Germany (1991-2009), Observatoire océanologique de Banyuls-sur-Mer in France (2009-2013), and the company Microbia Environment in France (2013-2016). As of 2008, she is an associate research fellow at the Marine Biological Association. Research Medlin's early work was with Greta Fryxell on the taxonomy of diatoms. She is known for her work on applying molecular tools to the study of phytoplankton, and she was the first to develop primers for polymerase chain reaction that targeted eukaryotic organisms, She applied this tool to taxonomic studies of multiple species of phytoplankton cultured in the laboratory. Her work extended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biliphyta
Biliphyta is an obsolete polyphyletic subkingdom of algae. It includes Glaucophyta The glaucophytes, also known as glaucocystophytes or glaucocystids, are a small group of unicellular algae found in freshwater and moist terrestrial environments, less common today than they were during the Proterozoic. The stated number of spec ... and Rhodophyta. Members of this group should not be confused with Picozoa, which is also called Picobiliphytes, which are also known as "biliphytes". References Further reading * Algal taxonomy Subkingdoms Obsolete eukaryote taxa {{algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryote
The eukaryotes ( ) constitute the Domain (biology), domain of Eukaryota or Eukarya, organisms whose Cell (biology), cells have a membrane-bound cell nucleus, nucleus. All animals, plants, Fungus, fungi, seaweeds, and many unicellular organisms are eukaryotes. They constitute a major group of Outline of life forms, life forms alongside the two groups of prokaryotes: the Bacteria and the Archaea. Eukaryotes represent a small minority of the number of organisms, but given their generally much larger size, their collective global biomass is much larger than that of prokaryotes. The eukaryotes emerged within the archaeal Kingdom (biology), kingdom Asgard (Archaea), Promethearchaeati and its sole phylum Promethearchaeota. This implies that there are only Two-domain system, two domains of life, Bacteria and Archaea, with eukaryotes incorporated among the Archaea. Eukaryotes first emerged during the Paleoproterozoic, likely as Flagellated cell, flagellated cells. The leading evolutiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photosynthetic Picoplankton
Photosynthetic picoplankton or picophytoplankton is the fraction of the photosynthetic phytoplankton of cell sizes between 0.2 and 2 μm (i.e. picoplankton). It is especially important in the central oligotrophic regions of the world oceans that have very low concentration of nutrients. History * 1952: Description of the first truly picoplanktonic species, ''Chromulina pusilla'', by Butcher.Butcher, R. (1952). Contributions to our knowledge of the smaller marine algae. ''Journal of the Marine Biological Association of the UK'' 31: 175-91. This species was renamed in 1960 to '' Micromonas pusilla''Manton, I. & Parke, M. (1960). Further observations on small green flagellates with special reference to possible relatives of ''Chromulina pusilla'' Butcher. ''Journal of the Marine Biological Association of the UK'' 39: 275-98. and a few studies have found it to be abundant in temperate oceanic waters, although very little such quantification data exists for eukaryotic picop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bigelow Laboratory For Ocean Sciences
Bigelow Laboratory for Ocean Sciences, founded in 1974, is an independent, non-profit oceanography research institute. The Laboratory's research ranges from microbial oceanography to the large-scale biogeochemical processes that drive ocean ecosystems and health of the entire planet. The institute's LEED Platinum laboratory is located on its research and education campus in East Boothbay, Maine. Bigelow Laboratory supports the work of over 100 scientists and staff. The majority of the institute's funding comes from federal and state grants and contracts, philanthropic support, and licenses and contracts with the private sector. History The Laboratory was established by Charles and Clarice Yentsch in 1974 as a private, non-profit research institution named for the oceanographer Henry Bryant Bigelow, founding director of the Woods Hole Oceanographic Institution. Bigelow's extensive investigations in the early part of the twentieth century are recognized as the foundation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastid
A plastid is a membrane-bound organelle found in the Cell (biology), cells of plants, algae, and some other eukaryotic organisms. Plastids are considered to be intracellular endosymbiotic cyanobacteria. Examples of plastids include chloroplasts (used for photosynthesis); chromoplasts (used for synthesis and storage of pigments); leucoplasts (non-pigmented plastids, some of which can cellular differentiation, differentiate); and apicoplasts (non-photosynthetic plastids of apicomplexa derived from secondary endosymbiosis). A permanent primary endosymbiosis event occurred about 1.5 billion years ago in the Archaeplastida cladeEmbryophyte, land plants, red algae, green algae and glaucophytesprobably with a cyanobiont, a symbiotic cyanobacteria related to the genus ''Gloeomargarita lithophora, Gloeomargarita''. Another primary endosymbiosis event occurred later, between 140 and 90 million years ago, in the photosynthetic plastids ''Paulinella'' amoeboids of the cyanobacteria genera '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photosynthesis
Photosynthesis ( ) is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism. ''Photosynthesis'' usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy so produced within intracellular organic compounds (compounds containing carbon) like sugars, glycogen, cellulose and starches. To use this stored chemical energy, an organism's cells metabolize the organic compounds through cellular respiration. Photosynthesis plays a critical role in producing and maintaining the oxygen content of the Earth's atmosphere, and it supplies most of the biological energy necessary for complex life on Earth. Some bacteria also perform anoxygenic photosynthesis, which uses bacteriochlorophyll to split hydrogen sulfide as a reductant instead of water, p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rutgers University
Rutgers University ( ), officially Rutgers, The State University of New Jersey, is a Public university, public land-grant research university consisting of three campuses in New Jersey. Chartered in 1766, Rutgers was originally called Queen's College and was affiliated with the Reformed Church in America, Dutch Reformed Church. It is the eighth-oldest college in the United States, the second-oldest in New Jersey (after Princeton University), and one of nine colonial colleges that were chartered before the American Revolution.Stoeckel, Althea"Presidents, professors, and politics: the colonial colleges and the American revolution", ''Conspectus of History'' (1976) 1(3):45–56. In 1825, Queen's College was renamed Rutgers College in honor of Colonel Henry Rutgers, whose substantial gift to the school had stabilized its finances during a period of uncertainty. For most of its existence, Rutgers was a Private university, private liberal arts college. It has evolved into a Mixed-sex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Melkonian
Michael Melkonian (born 1948) is a German botanist and phycologist. He was a professor of botany at the University of Cologne from 1988 to 2017. He is currently a senior professor of phycology at the University of Duisburg-Essen. Early life and education Michael Melkonian was born in 1948 in Hamburg. He earned his bachelor's degree in botany at the University of Hamburg in 1974. He received a doctorate in Botany with a focus in plant physiology in 1978 from the University of Hamburg. Career From 1978 to 1988 Melkonian was an Assistant Professor to the Botany Department at the University of Münster. In 1982, he was a visiting assistant professor at the Albert Einstein College of Medicine of Yeshiva University. From 1986–1988 he was a Heisenberg Fellow of the German Research Foundation (DFG). In 1988, he moved to the University of Cologne as a full professor and Chair of the Botany department. In 2001 Melkonian became the Director of the Central Collection of Algal Cultures (CC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterotrophs
A heterotroph (; ) is an organism that cannot produce its own food, instead taking nutrition from other sources of organic carbon, mainly plant or animal matter. In the food chain, heterotrophs are primary, secondary and tertiary consumers, but not producers. Living organisms that are heterotrophic include all animals and fungi, some bacteria and protists, and many parasitic plants. The term heterotroph arose in microbiology in 1946 as part of a classification of microorganisms based on their type of nutrition. The term is now used in many fields, such as ecology, in describing the food chain. Heterotrophs occupy the second and third trophic levels of the food chain while autotrophs occupy the first trophic level. Heterotrophs may be subdivided according to their energy source. If the heterotroph uses chemical energy, it is a chemoheterotroph (e.g., humans and mushrooms). If it uses light for energy, then it is a photoheterotroph (e.g., green non-sulfur bacteria). Heterotrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
