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Trichodesmium
''Trichodesmium'', also called sea sawdust, is a genus of Filamentation, filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it nitrogen fixation, fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to nitrogen fixation, fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Hildebrandtii
''Trichodesmium'', also called sea sawdust, is a genus of Filamentation, filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it nitrogen fixation, fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to nitrogen fixation, fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Radians
''Trichodesmium'', also called sea sawdust, is a genus of filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on surface waters. These large blooms led to wides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Tenue
''Trichodesmium'', also called sea sawdust, is a genus of Filamentation, filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it nitrogen fixation, fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to nitrogen fixation, fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Hildebrantii
''Trichodesmium'', also called sea sawdust, is a genus of Filamentation, filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it nitrogen fixation, fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to nitrogen fixation, fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Contortum
''Trichodesmium'', also called sea sawdust, is a genus of Filamentation, filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). ''Trichodesmium'' is a diazotroph; that is, it nitrogen fixation, fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. ''Trichodesmium'' is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally. ''Trichodesmium'' is the only known diazotroph able to nitrogen fixation, fix nitrogen in daylight under aerobic conditions without the use of heterocysts. ''Trichodesmium'' can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together. These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Thiebautii
''Trichodesmium thiebautii'' is a cyanobacteria that is often found in open oceans of tropical and subtropical regions and is known to be a contributor to large oceanic surface blooms. This microbial species is a diazotroph, meaning it fixes nitrogen gas (N2), but it does so without the use of heterocysts. ''T. thiebautii'' is able to simultaneously perform oxygenic photosynthesis. ''T. thiebautii'' was discovered in 1892 by M.A. Gomont. ''T. thiebautii'' are important for nutrient cycling in marine habitats because of their ability to fix N2, a limiting nutrient in ocean ecosystems. Discovery In 1830 the cyanobacteria genus ''Trichodesmium'' was first found in samples collected in marine waters surrounding Egypt and Syria, and described based on morphological features. In 1892, approximately sixty years following the initial discovery of the genus, Gomont described two new species, ''T. thiebautii'' and ''T. hildebrandtii'', based on specific morphological characteristics, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyanobacteria
Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue-green algae, although they are not usually scientifically classified as algae. They appear to have originated in a freshwater or terrestrial environment. Sericytochromatia, the proposed name of the paraphyletic and most basal group, is the ancestor of both the non-photosynthetic group Melainabacteria and the photosynthetic cyanobacteria, also called Oxyphotobacteria. Cyanobacteria use photosynthetic pigments, such as carotenoids, phycobilins, and various forms of chlorophyll, which absorb energy from light. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes. These are flattened sacs called thylakoids where photosynthesis is performed. Phototrophic eukaryotes such as green plants perform photosynthesis in plast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichodesmium Erythraeum
''Trichodesmium erythraeum'' is a species of cyanobacteria that are unique in being visible to the naked eye. This species is also known as " sea sawdust". It was originally discovered in 1770 by Captain Cook off the coast of Australia. Anatomy This is a prolific nitrogen-fixing and phosphorus reducing species of bacteria that fixes approximately half of the nitrogen in the food chain of the ocean and contributes to the turn over of phosphorus. Unlike other bacteria, it can also photosynthesize. This is a colonial species that forms long filaments and tends to accumulate with other ''Trichodesmium''. It is gram-negative and motile. Some of the bacteria in the colony fix the nitrogen, and others are specialized for photosynthesis. However, the two processes must be done with two of them, because the oxygen byproduct that results from photosynthesis would interfere with the nitrogen-fixing process. This is done either by, having two separate cells share resources with each other o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Fixation
Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms. Biological nitrogen fixation or ''diazotrophy'' is an important microbials mediated process that converts dinitrogen (N2) gas to ammonia (NH3) using the nitrogenase protein complex (Nif). Nitrogen fixation is essential to life because fixed inorganic nitrogen compounds are required for the biosynthesis of all nitrogen-containing organic compounds, such as amino acids and proteins, nucleoside triphosphates and nucleic acids. As part of the nitrogen cycle, it is essential for agriculture and the manufacture of fertilizer. It is also, indirectly, relevant to the manufacture of all nitrogen chemical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Fixation
Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms. Biological nitrogen fixation or ''diazotrophy'' is an important microbials mediated process that converts dinitrogen (N2) gas to ammonia (NH3) using the nitrogenase protein complex (Nif). Nitrogen fixation is essential to life because fixed inorganic nitrogen compounds are required for the biosynthesis of all nitrogen-containing organic compounds, such as amino acids and proteins, nucleoside triphosphates and nucleic acids. As part of the nitrogen cycle, it is essential for agriculture and the manufacture of fertilizer. It is also, indirectly, relevant to the manufacture of all nitrogen chemical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Sea
The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; Tigrinya: ቀይሕ ባሕሪ ''Qeyih Bahri''; ) is a seawater inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab el Mandeb strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez (leading to the Suez Canal). It is underlain by the Red Sea Rift, which is part of the Great Rift Valley. The Red Sea has a surface area of roughly 438,000 km2 (169,100 mi2), is about 2250 km (1398 mi) long, and — at its widest point — 355 km (220.6 mi) wide. It has an average depth of 490 m (1,608 ft), and in the central ''Suakin Trough'' it reaches its maximum depth of . The Red Sea also has exten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diazotroph
Diazotrophs are bacteria and archaea that fix gaseous nitrogen in the atmosphere into a more usable form such as ammonia. A diazotroph is a microorganism that is able to grow without external sources of fixed nitrogen. Examples of organisms that do this are rhizobia and ''Frankia'' (in symbiosis) and ''Azospirillum''. All diazotrophs contain iron-molybdenum or iron-vanadium nitrogenase systems. Two of the most studied systems are those of ''Klebsiella pneumoniae'' and ''Azotobacter vinelandii''. These systems are studied because of their genetic tractability and their fast growth. Etymology The word diazotroph is derived from the words ''diazo'' ("di" = two + "azo" = nitrogen) meaning "dinitrogen (N2)" and ''troph'' meaning "pertaining to food or nourishment", in summary dinitrogen utilizing. The word ''azote'' means nitrogen in French and was named by French chemist and biologist Antoine Lavoisier, who saw it as the part of air which cannot sustain life. Types of diazotrophs Diaz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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