desmid


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to desmid: Ulothrix

desmid,

a protist of the class Charophyceae (see ChlorophytaChlorophyta
, phylum (division) of the kingdom Protista consisting of the photosynthetic organisms commonly known as green algae. The organisms are largely aquatic or marine.
..... Click the link for more information.
).

desmid

[′dez·məd]
(botany)
Any member of a group of microscopic, unicellular green algae of the family Desmidiaceae, having cells of varying shapes but always composed of mirror-image semicells, often demarcated by a median constriction or incision, and a cell wall that has pores, which are frequently ornamented.
References in periodicals archive ?
Key words: Desmids, taxonomy, ecology, Colombian Amazon Basin.
A synopsis of North American Desmids part 11: Desmidiaceae: Placodermae.
Seasonality of planktonic desmid species in Lake Maarsseveen (The Netherlands) related to experimentally determined growth rates in a temperature-light gradient.
Oligotrophication and eutrophication tendencies in some Dutch moorland pools, as reflected in their desmid flora.
Food encountered included blue green algae (Spirulina, Nostoc) green algae (Mougeotia, Oedogonium), desmids (Gonatozygon, Closterium, Spirotaemaia), diatoms (Navicula, Nitschia); rotifers (Gastropus, Trichocerca), Crustacea, plant parts, insect appendages, sand grains, and snail (Melanoides tuberculata).
Desmids are more predominant in the diet during the dry season months of January to March, where they constitute 13.
For example, the population of desmids is richer in the Colombian Andean lakes than in the lakes of the Alps and is much richer than the population of the lakes in the Pyrenees.
The algal community is thus delimited to a few species capable of exploiting these extreme conditions (Devercelli, 2010), which are usually small unicellular pennate diatoms and desmids (Reynolds, 2006; Soares et al.
Botos Lake was dominated by dinoflagelates (Hargraves & Viquez 1981, Umana 2001), Chato Lake was dominated by desmids (Arthodesmus bifidus) and Cryptophyta was not found in the samples (Umana & Jimenez 1995).
In Amazon waters, desmids are considered an important group due to the acidic conditions of the waters (Huszar 1996b, 2000, Keppeler et al.