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In terms of number of species, dinoflagellates are one of the largest groups of marine eukaryotes, although substantially smaller than diatoms. [8] Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs .
The most important groups of phytoplankton include the diatoms and dinoflagellates. Diatoms are especially important in oceans, where according to some estimates they contribute up to 45% of the total ocean's primary production. [22] Diatoms are usually microscopic, although some species can reach up to 2 millimetres in length.
Marine algae can be divided into six groups: green, red and brown algae, euglenophytes, dinoflagellates and diatoms. Dinoflagellates and diatoms are important components of marine algae and have their own sections below. Euglenophytes are a phylum of unicellular flagellates with only a few marine members. Not all algae are microscopic.
The diatom that received the larger frustule becomes the same size as its parent, but the diatom that received the smaller frustule remains smaller than its parent. This causes the average cell size of this diatom population to decrease. [ 16 ]
Symbiodinium is a genus of dinoflagellates that encompasses the largest and most prevalent group of endosymbiotic dinoflagellates known and have photosymbiotic relationships with many species. These unicellular microalgae commonly reside in the endoderm of tropical cnidarians such as corals , sea anemones , and jellyfish , where the products of ...
• Red = diatoms (big phytoplankton, which need silica) • Yellow = flagellates (other big phytoplankton) • Green = prochlorococcus (small phytoplankton that cannot use nitrate) • Cyan = synechococcus (other small phytoplankton) Opacity indicates concentration of the carbon biomass.
Marine algae can be divided into six groups: green, red and brown algae, euglenophytes, dinoflagellates and diatoms. Dinoflagellates and diatoms are important components of marine algae and have their own sections below. Euglenophytes are a phylum of unicellular flagellates with only a few marine members. Not all algae are microscopic.
Mixotrophic dinoflagellates can feed on various organisms including bacteria, picoeukaryotes, nanoflagellates, diatoms, protists, metazoans and other dinoflagellates, as well. [8] Feeding and digestion rates in mixotrophic dinoflagellates are lower than those in strictly heterotrophic dinoflagellates. [ 8 ]
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