- published: 06 Mar 2016
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The dinoflagellates (Greek δῖνος dinos "whirling" and Latin flagellum "whip, scourge") are a large group of flagellate protists that constitute the phylum Dinoflagellata. Most are marine plankton, but they are common in fresh water habitats as well. Their populations are distributed depending on temperature, salinity, or depth. Many dinoflagellates are known to be photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey (phagotrophy). In terms of number of species, dinoflagellates form one of the largest groups of marine eukaryotes, although this group is substantially smaller than the diatoms. Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are colorless predators on other protozoa, and a few forms are parasitic (see for example Oodinium, Pfiesteria). Some dinoflagellates produce resting stages, called dinoflagellate cysts or dinocysts, as part of their life cycles.
Multiple videos of bioluminescent waves off the coast of California have us wondering: What kind of otherworldly phenomenon is this? To find out, Jorge Ribas talks to a marine biologist.
Los Dinoflagelados corresponden al la clase Dinophyceae, orden Peridiniales, se caracterizan por la presencia de dos surcos, uno transversal y otro logitudinal. En cada uno de ellos se halla un flagelo. El flagelo transversal es solo visible a traves del microscopio electronico El flagelo longitudinal ( el que observamos en el video ) sobresale de la celula Los movimientos circulares y a saltos, caracteristicos de los diniflagelados, se consigue con la acción conjunta de los dos flagelos The Dinoflagellates correspond to the class Dinophyceae, Peridiniales order, are characterized by the presence of two rows, one transverse and one longitudinal. In each of these is a scourge. The transverse flagellum is visible only through electron microscopy The longitudinal flagellum (which we...
This video describes about general characteristics of Dinoflagellates, is a well defined group of unicellular, golden brown photosynthetic organisms.
Pyrocystis is a bioluminescent unicellular algae. At night, it reacts to the agitation of the water by producing some light thanks to a biochemical reaction between the luciférine and the luciférase.
Bioluminescence of the dinoflagellate Pyrocystis fusiformis stimulated by hand. See more at https://scripps.ucsd.edu/labs/mlatz/
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Ceratium hirudinella: the flattened shape and horns of this dinoflagellate can be seen in this movie of live cells rotating as they swim along. From a pond at Pitsford Water, Northamptonshire, UK The Freshwater Algal Flora of the British Isles 2nd edn (2011), p. 262, pl. 67E (p. 263) http://www.algaebase.org/search/species/detail/?species_id=30383