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what are desmids

what are desmids

Desmids are single-cell algae that are made up of over 5,000 different species found mostly in freshwater environments. Desmids are unicellular micro-organisms belonging to the green algal families of Mesotaeniaceae and Desmidiaceae. thanks so much. The cells may vary in shape within a single species, making identification and classification difficult. Desmids are unicellular, microscopic, green algae which are widely distributed in a variety of freshwater habitats, although they are typically found in clear oligotrophic water. Desmids themselves are often divided into two symmetrical halves connected by a thin bridge where the nucleus resides. DESMIDS. desmos, bond or chain), are an order in the Charophyta, a division of green algae in which the land plants (Embryophyta) emerged. Desmidiales, commonly called desmids (Gr. Desmid definition is - any of numerous unicellular or colonial green algae (order Zygnematales, especially family Desmidiaceae). Desmids. Strictly speaking, these are protists, rather than plants, but many people still think of them as plants: after all they do possess chlorophyll for photosynthesis. So, for studying them a microscope is indispensable. Of course many have the disconcerting habit of moving around, often quite rapidly, and not very plant-like... Diatom Circle slide Length weight relationship, condition factor and stomach contents of Hemichromis bimaculatus, Sarotherodon melanotheron and Chromidotilapia guentheri (Perciformes: Cichlidae) in Eleiyele Lake, Southwestern Nigeria They occur in standing freshwaters. In addition to releasing oxygen into the air, desmids also benefit humans by absorbing large amounts of barium from the water, … Phylum Chlorophyta; sub-phylum Chlorophyceae; order Zygnematales. desmids A group of green algae (division Chlorophyta) which are basically unicellular but have two distinct halves, or ‘semicells’.The cells are usually solitary but in a few species they may form irregular or filamentous colonies. Desmid is represented by Gonatozygon and Closterium, Docidium and Netrium also occurred in the diet but in lesser quantity. Although among the microbes ranking as real giants, with the unaided eye even the largest representatives are hardly to be seen. Desmid definition, any single-celled freshwater algae of the family Desmidiaceae, characterized by a division of the body into mirror-image halves joined by a bridge containing the nucleus, and having a spiny or bristly exterior: sometimes forming … Diatoms, Desmids and Other Algae. Desmids. There are two groups of Desmids: the "Placoderm" and the "Saccoderm" Desmids.Saccoderm desmids are simple shapes, cylindrical or spindle-shaped, rarely with any median constriction. Cosmarium is characterized by having generally solitary cells, semicells rounded, reniform, pyramidate, quadrate with entire or undulate margin; subcircular to elongate-oval (biradiate) in apical view; cell wall smooth with scattered pores or ornamented; one to several chloroplasts per semicell, axial or parietal, and as well as other desmids generally inhabit acidic, oligotrophic, … Taxonomically they are members the order Desmidiales with two sub-orders and numerous families. Or in other words, Desmid, (order Desmidiales), order of single-celled (sometimes filamentous or colonial) microscopic green algae.Desmids are sometimes treated as a family (Desmidiaceae) of the … Article by Wim van Egmond on these organisms with many excellent photographs of various species. 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