Oscillatoria
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| Scientific name | ||||||||||||
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| Vaucher ex Gomont |
The Oscillatoria (swinging algae) are a genus group of cyanobacteria . The bacterial threads are capable of a slowly oscillating movement, as the name refers to.
features
Oscillatoria always form unbranched threads from a row of cells. They usually appear in dense mats up to several centimeters thick, but only rarely individually or in small groups. Under extreme conditions, the threads have a thin, colorless and solid sheath that is open at the outer end. The filaments are straight or slightly wavy in shape and are usually between eight and 60 micrometers wide. In good environmental conditions, the threads are flexible, they “ oscillate ”.
The cells are from short cylindrical to barrel-shaped, rarely disc-like shape, but always shorter than wide. The cells at the end of the threads are broadly rounded, sometimes head-shaped. Aerotopes , i.e. gas bubbles, are absent in the cells, but they have fine, blue-green, brownish or pink-colored granules with coiled thylakoids , which are mostly irregularly distributed throughout the cell.
Distribution and ecology
The genus is distributed worldwide. The species grow on a wide variety of substrates (mud, stone, sand) in fresh water, mostly in shallow waters or the riparian zones e.g. B. large lakes. They rarely thrive on wet soils. The large mats, which develop submerged in the benthos , but later float on the water surface in large quantities, are typical .
Systematics
Type species is the Oscillatoria princeps Vaucher ex Gamont, first described in 1892 . The genus includes the following species:
- Oscillatoria additica
- Oscillatoria anguiformis
- Oscillatoria anguina
- Oscillatoria annae
- Oscillatoria bharadwajae
- Oscillatoria bonnemaisonii
- Oscillatoria breviarticulata
- Oscillatoria corakiana
- Oscillatoria curviceps
- Oscillatoria depauperata
- Oscillatoria dzeman-sor
- Oscillatoria engelmanniana
- Oscillatoria euboeica
- Oscillatoria fracta
- Oscillatoria froelichii
- Oscillatoria funiformis
- Oscillatoria gardneriana
- Oscillatoria iltisii
- Oscillatoria jenensis
- Oscillatoria kansuensis
- Oscillatoria kawamurae
- Oscillatoria koetlitzii
- Oscillatoria leavittae
- Oscillatoria leonardii
- Oscillatoria levis
- Oscillatoria limosa
- Oscillatoria lloydiana
- Oscillatoria ludoviciana
- Oscillatoria lutea
- Oscillatoria maharastrensis
- Oscillatoria major
- Oscillatoria maraaensis
- Oscillatoria margaritifera
- Oscillatoria meslinii
- Oscillatoria miniata
- Oscillatoria mitrae
- Oscillatoria nigro-viridis
- Oscillatoria nitida
- Oscillatoria obscura
- Oscillatoria obtusa
- Oscillatoria ornata
- Oscillatoria perornata
- Oscillatoria princeps
- Oscillatoria proboscidea
- Oscillatoria producta
- Oscillatoria pseudocurviceps
- Oscillatoria raytonensis
- Oscillatoria pulchra
- Oscillatoria refringens
- Oscillatoria rhamphoidea
- Oscillatoria rupicola
- Oscillatoria salina
- Oscillatoria sancta
- Oscillatoria serpentina
- Oscillatoria simplicissima
- Oscillatoria subbrevis
- Oscillatoria subcapitata
- Oscillatoria subfusca
- Oscillatoria subproboscidea
- Oscillatoria tenuis
- Oscillatoria transvaalensis
- Oscillatoria vizagapatensis
- Oscillatoria yamadae
proof
- ↑ a b c d Komárek J. & Hauer T .: Oscillatoria , In: CyanoDB.cz - On-line database of cyanobacterial genera. - Word-wide electronic publication, Univ. of South Bohemia & Inst. of Botany AS CR, accessed February 25, 2012
