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Diadema (sea Urchin)
''Diadema'' is a genus of sea urchins of the family (biology), family Diadematidae. Characteristics It is one of the most abundant, widespread, and ecologically important shallow water genera of tropical sea urchins. It is found in all tropical oceans, although is ubiquitous in the Indo-Pacific region, where it inhabits depths down to 70 m. However each species inhabits roughly separate areas of ocean. Speciation within the genus can be difficult to confirm, partly due to Hybrid (biology), hybridisation, which is at least known to occur between ''Diadema savignyi'' and ''Diadema setosum''. The species vary in types of sea bed they inhabit, with ''Diadema savignyi'' inhabiting sandy beds and back coral reef, reef where damaged; while ''Diadema setosum'' can also commonly be found among seagrass. Fossil record The fossil record of ''Diadema'' is extremely poor, consisting only of spines that possibly belong to the genus, some of which go back to the Miocene, 5 to 25 million ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinothrix Diadema
''Echinothrix'' is a genus of sea urchins which was first described in 1853 by Wilhelm Peters, a German naturalist and explorer. Description and characteristics The genus contains two species, ''Echinothrix diadema, E. diadema'' and ''Echinothrix calamaris, E. calamaris''. These can be distinguished by the fact that ''E. diadema'' has fully black spines whereas ''E. calamaris'' has striped spines. Both of these species are found in the Indo-Pacific region, living on coral reefs. Taxonomy According to World Register of Marine Species : References Diadematidae Taxa named by Wilhelm Peters {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seagrass
Seagrasses are the only flowering plants which grow in marine (ocean), marine environments. There are about 60 species of fully marine seagrasses which belong to four Family (biology), families (Posidoniaceae, Zosteraceae, Hydrocharitaceae and Cymodoceaceae), all in the order Alismatales (in the clade of monocotyledons). Seagrasses evolved from terrestrial plants which recolonised the ocean 70 to 100 million years ago. The name ''seagrass'' stems from the many species with long and narrow Leaf, leaves, which grow by rhizome extension and often spread across large "Seagrass meadow, meadows" resembling grassland; many species superficially resemble terrestrial grasses of the family Poaceae. Like all autotrophic plants, seagrasses photosynthesize, in the submerged photic zone, and most occur in shallow and sheltered coastal waters anchored in sand or mud bottoms. Most species undergo submarine pollination and complete their life cycle underwater. While it was previously believed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elsevier
Elsevier ( ) is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as ''The Lancet'', ''Cell (journal), Cell'', the ScienceDirect collection of electronic journals, ''Trends (journals), Trends'', the ''Current Opinion (Elsevier), Current Opinion'' series, the online citation database Scopus, the SciVal tool for measuring research performance, the ClinicalKey search engine for clinicians, and the ClinicalPath evidence-based cancer care service. Elsevier's products and services include digital tools for Data management platform, data management, instruction, research analytics, and assessment. Elsevier is part of the RELX Group, known until 2015 as Reed Elsevier, a publicly traded company. According to RELX reports, in 2022 Elsevier published more than 600,000 articles annually in over 2,800 journals. As of 2018, its archives contained over 17 million documents and 40,000 Ebook, e-books, with over one b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timothy R
Timothy is a masculine name. It comes from the Greek name ( Timόtheos) meaning "honouring God", "in God's honour", or "honoured by God". Timothy (and its variations) is a common name in several countries. People Given name * Timothy (given name), including a list of people with the name * Tim (given name) * Timmy * Timo * Timotheus * Timothée * Timoteo (given name) Surname * Bankole Timothy (1923–1994), Sierra Leonean journalist * Christopher Timothy (born 1940), Welsh actor * Miriam Timothy (1879–1950), British harpist * Nick Timothy (born 1980), British political adviser Mononym * Saint Timothy, a companion and co-worker of Paul the Apostle * Timothy I (Nestorian patriarch) Education * Timothy Christian School (Illinois), a school system in Elmhurst, Illinois * Timothy Christian School (New Jersey), a school in Piscataway, New Jersey Arts and entertainment * "Timothy" (song), a 1970 song by The Buoys * ''Timothy Goes to School'', a Canadian-Chinese chil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nyawira Muthiga
Nyawira A. Muthiga is an African conservation zoologist who is Director of the Western Indian Ocean Marine Science Association Marine Programme in Kenya. She is a conservation scientist for the Wildlife Conservation Society. Early life and education Muthiga was born in Kenya, and spent part of her childhood in Dar es Salaam. She earned her undergraduate degree in biological oceanography in the United States. She completed her master's degree at the Florida State University, where she studied the impact of salinity on the photosynthesis of ''Siderastrea siderea''. Muthiga returned to Kenya for her doctoral research, where she joined the University of Nairobi. Research and career In 2000 Muthiga was elected President of the Western Indian Ocean Marine Science Association Board of Trustees (WIOMSA). She oversaw the growth of the WIOMSA internationally, building local chapters and networks. Muthiga worked for the Kenya Wildlife Service where she led the coastal and wetland progra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Vetus
Diadema is the term for diadem in most Romance languages, and in English may refer to: * Diadema, São Paulo Diadema (, ''Diadem'') is a municipality in São Paulo state, Brazil. Belonging to the ABCD Region of Greater São Paulo, it is distant from Praça da Sé, São Paulo's central point. Initially part of São Bernardo do Campo, Diadema became a cit ..., a city in São Paulo state, Brazil * ''Diadema'' (sea urchin), a genus of sea urchin belonging to the family Diadematidae * ''Diadema'' (fungus), a genus of fungi in the family Diademaceae * '' Damon diadema'', a species of arachnid, sometimes known as the tailless whip scorpion * '' Sinea diadema'', a species of the assassin bug family, native to North America {{disambiguation, genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Principeana
Diadema is the term for diadem in most Romance languages, and in English may refer to: * Diadema, São Paulo Diadema (, ''Diadem'') is a municipality in São Paulo state, Brazil. Belonging to the ABCD Region of Greater São Paulo, it is distant from Praça da Sé, São Paulo's central point. Initially part of São Bernardo do Campo, Diadema became a cit ..., a city in São Paulo state, Brazil * ''Diadema'' (sea urchin), a genus of sea urchin belonging to the family Diadematidae * ''Diadema'' (fungus), a genus of fungi in the family Diademaceae * '' Damon diadema'', a species of arachnid, sometimes known as the tailless whip scorpion * '' Sinea diadema'', a species of the assassin bug family, native to North America {{disambiguation, genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Setosum (Kenya)
''Diadema setosum'' is a species of long-spined sea urchin belonging to the family Diadematidae. It is a typical sea urchin, with extremely long, hollow spines that are mildly venomous. ''D. setosum'' differs from other '' Diadema'' with five, characteristic white dots that can be found on its body. The species can be found throughout the Indo-Pacific region, from Australia and Africa to Japan and the Red Sea. Despite being capable of causing painful stings when stepped upon, the urchin is only slightly venomous and does not pose a serious threat to humans. Description As a member of the class Echinoidea, the anatomy of ''Diadema setosum'' is that of a typical sea urchin. All of the animal's internal organs are enclosed within the near-spherical, black test that is essentially the body and skeleton of the organism. However, the body is not perfectly spherical – ''Diadema'' tests are slightly dorso-ventrally compressed. Protruding outwards from the central body are the long spi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diadema Savignyi1
Diadema is the term for diadem in most Romance languages, and in English may refer to: * Diadema, São Paulo Diadema (, ''Diadem'') is a municipality in São Paulo state, Brazil. Belonging to the ABCD Region of Greater São Paulo, it is distant from Praça da Sé, São Paulo's central point. Initially part of São Bernardo do Campo, Diadema became a cit ..., a city in São Paulo state, Brazil * ''Diadema'' (sea urchin), a genus of sea urchin belonging to the family Diadematidae * ''Diadema'' (fungus), a genus of fungi in the family Diademaceae * '' Damon diadema'', a species of arachnid, sometimes known as the tailless whip scorpion * '' Sinea diadema'', a species of the assassin bug family, native to North America {{disambiguation, genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Urchin And Blue Seastar
Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The term ''blue'' generally describes colours perceived by humans observing light with a dominant wavelength that's between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called the Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultrama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
