Английская Википедия:Fragilariopsis cylindrus
Шаблон:Short description Шаблон:Speciesbox
Fragilariopsis cylindrus[1] is a pennate sea-ice diatom that is found native in the Argentine Sea and Antarctic waters, with a pH of 8.1–8.4.[2] It is regarded as an indicator species for polar water.
Description
Fragilariopsis cylindrus is a unicellular, eukaryotic, microalgae that is important due to its ecological roles.[2] This is because it is major contributor to climate change processes, responsible for 20% global carbon fixation,[2] and forms a substantial basis of the marine food web, making up 40% of marine primary productivity.[2] F. cylindrus is found native to the Southern Ocean,[1] with their proximal side valve mantle being 1.6Шаблон:Nbspμm, their girdle 0.75Шаблон:Nbspμm, apical axis ranging between 15.5Шаблон:Nbspμm to 55.0Шаблон:Nbspμm, transapical axis ranging from 2.4Шаблон:Nbspμm to 4.0Шаблон:Nbspμm, and their transapcial axis ranging from 2.4Шаблон:Nbspμm to 4.0Шаблон:Nbspμm.[1] Their transapical striae count is 10–16, with a mean of 10Шаблон:Nbspμm, while their row of poroids range from 50 to 56, in 10Шаблон:Nbspμm.[1] F. cylindrus typically forms large populations in the bottom layer of sea ice, as well as in the wider sea-ice zone, which includes open waters.[2] It is known for its ability to survive temperatures below 0Шаблон:Nbsp°C, high salinity, the semi-enclosed pore systems within the ice, as well as low diffusion rates of dissolved gases and exchange of inorganic nutrients that occur within their environment.[1][2] F. cylindrus is a phototropic organism, but is able to sustain essential metabolic processes in the dark, ensuring rapid recovery upon re-illumination, and allowing them to survive long-term darkness.[2] Gram stain, cellulose activity, growth rate, motility and the microbe's ability to resist/produce antibiotics have are unknown at this moment.[1]
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