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Nitzschia
''Nitzschia'' is a common pennate marine diatom. In the scientific literature this genus is sometimes termed ''Nitzchia'', this taxon has many species described, which all have a similar morphology.
== Occurrence ==
''Nitzschia'' is found mostly in colder waters, and is associated with both Arctic and Antarctic polar sea ice where it is often found to be the dominant diatom. ''Nitzschia'' includes several species of diatoms known to produce the neurotoxin known as domoic acid, a toxin which is responsible for the human illness called amnesic shellfish poisoning. The species ''N. frigida'' is found to grow exponentially even at temperatures between −4 and −6 degrees Celsius.〔L. Aletsee and J.Jahnke, 'Growth and productivity of the psychrophilic marine diatoms ''Thalassiosira antarctica'' Comber and ''Nitzschia frigida'' Grunow in batch cultures at temperatures below the freezing point of sea water. ''Polar biol''(1992) 11:643-647>〕 Some ''Nitzchia'' species are also extremophiles by dent of tolerance to high salinity; for example, some halophile species of ''Nitzchia'' are found in the Makgadikgadi Pans in Botswana.〔C. Michael Hogan (2008) (The Megalithic Portal, ed. A. Burnham )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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