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Ceratium
The genus ''Ceratium'' is restricted to a small number (about 7) of freshwater dinoflagellate species. Previously the genus contained also a large number of marine dinoflagellate species. However, these marine species have now been assigned to a new genus called ''Tripos''. ''Ceratium'' dinoflagellates are characterized by their armored plates, two flagella, and horns. They are found worldwide and are of concern due to their blooms. Taxonomy The genus was originally published in 1793 by Shrank, F. von Paula. The taxonomy of ''Ceratium'' varies among several sources. One source states the taxonomy as: Kingdom Chromista, Phylum Miozoa, Class Dinophyceae, Order Gonyaulacales, and Family Ceratiaceae. Another source lists the taxonomy as Kingdom Protozoa, Phylum Dinoflagellata, Class Dinophyceae, Order Gonyaulacales, and Family Ceratiaceae. Thus, sources disagree on the higher levels of classification, but agree on lower levels. '' C. furcoides'' was originally named '' C. hirundi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinoflagellate
The Dinoflagellates (), also called Dinophytes, are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata and are usually considered protists. Dinoflagellates are mostly marine plankton, but they are also common in freshwater habitats. Their populations vary with sea surface temperature, salinity, and depth. Many dinoflagellates are photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey ( phagotrophy and myzocytosis). In terms of number of species, dinoflagellates are one of the largest groups of marine eukaryotes, although substantially smaller than diatoms. Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are unpigmented predators on other protozoa, and a few forms are parasitic (for example, '' Oodinium'' and '' Pfiesteria''). Some dinoflagellates produce resting stages, called dinoflagellate cys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratium Furca
''Ceratium furca'' is a species of marine dinoflagellates. Description This species has a straight body which is 70-200 μm long and 30-50 μm wide, with the epitheca gradually tapering into an anterior horn. ''C. furca'' has long spines, and is an "armoured" species with a theca of thick cellulose Cellulose is an organic compound with the chemical formula, formula , a polysaccharide consisting of a linear chain of several hundred to many thousands of glycosidic bond, β(1→4) linked glucose, D-glucose units. Cellulose is an important s ... plates. The cells are nearly flat, with the ventral side concave and the dorsal side being convex. Distribution ''Ceratium furca'' is found worldwide. Subspecies *''Ceratium furca eugrammum'' *''Ceratium furca furca'' References {{Taxonbar, from=Q2562687 Protists described in 1859 Gonyaulacales Dinoflagellate species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratium Tripos
''Tripos muelleri'' is a species of dinoflagellates of the genus ''Tripos''. Anatomy This chromist is easy to recognize and identify among all the phytoplankton, because of its three horns in a pitchfork arrangement. The horn in the middle is called the apical horn, and it is used as a flagellum. The other two horns are called lateral horns, and they are solely used as an aid for flotation. Habitat This species lives along all the phytoplankton on the ocean surface worldwide, where it is one of the dominant species. Despite this, it is usually solitary, although during reproduction season, several individuals may congregate, all of their apical horns join. This occurs when a cell divides, so that the daughter cells remain together, linked in short chains. This particular species may sometimes be parasitized by other chromists or protists. History ''Tripos'' species were originally classified under the genus ''Ceratium The genus ''Ceratium'' is restricted to a small number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tripos (dinoflagellate)
''Tripos'' is a genus of marine dinoflagellates in the family Ceratiaceae. It was formerly part of ''Ceratium'', then separated out as ''Neoceratium'', a name subsequently determined to be invalid. Species * '' Tripos aequatorialis'' (Schröder) F.Gómez * '' Tripos aestuarius'' (Schröder) F.Gómez * '' Tripos allieri'' (Gourret) F.Gómez * '' Tripos angustocornis'' (N.Peters) F.Gómez * '' Tripos angustus'' (A.S.Campbell) F.Gómez * ''Tripos arcticus'' (Vanhöffen) F.Gómez * '' Tripos arietinus'' (Cleve) F.Gómez * '' Tripos aultii'' (H.W.Graham & Bronikovsky) F. Gómez * ''Tripos axialis'' (Kofoid) F.Gómez * '' Tripos azoricus'' (Cleve) F.Gómez * '' Tripos balechii'' (Meave del Castillo, Okolodkov & M.E.Zamudio) F.Gómez * ''Tripos balticus'' (F.Schütt) F.Gómez * '' Tripos batavus'' (Paulsen) F.Gómez * '' Tripos belone'' (Cleve) F.Gómez * '' Tripos berghii'' (Gourret) F.Gómez * '' Tripos biceps'' (Claparède & Lachmann) F.Gómez * '' Tripos bicornis'' (Gourret) F.G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle, organelle known as a plastid that conducts photosynthesis mostly in plant cell, plant and algae, algal cells. Chloroplasts have a high concentration of chlorophyll pigments which capture the Radiant energy, energy from sunlight and convert it to chemical energy and release oxygen. The chemical energy created is then used to make sugar and other organic molecules from carbon dioxide in a process called the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in some unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. Chloroplasts are highly dynamic—they circulate and are moved around within cells. Their behavior is strongly influenced by environmental factors like light color and intensity. Chloroplasts cannot be made anew by the plant cell and must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Tide
A harmful algal bloom (HAB), or excessive algae growth, sometimes called a red tide in marine environments, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means. HABs are sometimes defined as only those algal blooms that produce toxins, and sometimes as any algal bloom that can result in severely lower oxygen levels in natural waters, killing organisms in marine or fresh waters. Blooms can last from a few days to many months. After the bloom dies, the microbes that decompose the dead algae use up more of the oxygen, generating a " dead zone" which can cause fish die-offs. When these zones cover a large area for an extended period of time, neither fish nor plants are able to survive. It is sometimes unclear what causes specific HABs as their occurrence in some locations appears to be entirely natural, while in others they appear to be a res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
