/suy'euh noh bak tear"ee euh, suy an'oh-/,, sing. cyanobacterium /-tear"ee euhm/. Biol.
blue-green algae.
[1975-80; CYANO-1 + BACTERIA]

* * *

Any of a large group of prokaryotic, mostly photosynthetic organisms.

Though classified as bacteria, they resemble the eukaryotic algae in many ways, including some physical characteristics and ecological niches, and were at one time treated as algae. They contain certain pigments, which, with their chlorophyll, often give them a blue-green colour, though many species are actually green, brown, yellow, black, or red. They are common in soil and in both salt and fresh water, and they can grow over a wide range of temperatures, from Antarctic lakes under several metres of ice to Yellowstone National Park's hot springs in the U.S. Cyanobacteria are often among the first species to colonize bare rock and soil. Some are capable of nitrogen fixation; others contain pigments that enable them to produce free oxygen as a by-product of photosynthesis. Under proper conditions (including pollution by nitrogen wastes) they can reproduce explosively, forming dense concentrations called blooms, usually coloured an opaque green. Cyanobacteria played a large role in raising the level of free oxygen in the atmosphere of early Earth.

* * *

Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Cyanobacteria — Temporal range: 3500–0 Ma Had n Archean …   Wikipedia

  • Cyanobacteria — Cyanobacteria, Cyanobakterien, »Blaualgen«, ca. 2000 überwiegend photoautotrophe Arten umfassende Abteilung der ⇒ Bakterien; werden zusammen mit den ⇒ Prochlorophyta auch als prokaryotische Algen bezeichnet.     Die C. Zelle entspricht weitgehend …   Deutsch wörterbuch der biologie

  • cyanobacteria — [sī΄ə nō bak tir′ē ə] pl.n. sing. cyanobacterium [sī΄ə nō bak tir′ēəm] BLUE GREEN ALGAE …   English World dictionary

  • Cyanobacteria —   Cianobacterias Lyngbya …   Wikipedia Español

  • Cyanobacteria — Cyanobakterien Zellfäden von Nostoc spp. Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Cyanobacteria — Cyanobactéries …   Wikipédia en Français

  • cyanobacteria — cyanobacterium cyanobacterium pl. cyanobacteria cyanobacteria [from the pigment phycocyanin.] any of a group of photosynthetic autotrophic prokaryotic microorganisms possessing characteristics of both bacteria and plants. When classed as bacteria …   The Collaborative International Dictionary of English

  • Cyanobacteria — melsvabakterės statusas T sritis ekologija ir aplinkotyra apibrėžtis Vienaląsčiai (rutulio, ritinio, verpstės, pjautuvo formos), kolonijiniai ar daugialąsčiai (siūliški) organizmai (Cyanobacteria) – melsvai žalios bakterijos, paplitusios… …   Ekologijos terminų aiškinamasis žodynas

  • cyanobacteria — blue green alga lue green al ga pl. {blue green al gae} [from the color and resemblance to algae.] any of a group of photosynthetic microorganisms possessing characteristics of both bacteria and plants. When classed as bacteria, they are… …   The Collaborative International Dictionary of English

  • Cyanobacteria — A division of the kingdom Prokaryotae consisting of unicellular or filamentous bacteria that are either nonmotile or possess a gliding motility, reproduce by binary fission, and perform photosynthesis with the production of oxygen. These blue… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”