Trichodesmium | |
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Trichodesmium bloom off the Great Barrier Reef | |
Scientific classification | |
Domain: | Bacteria |
Phylum: | Cyanobacteria |
Class: | Cyanophyceae |
Order: | Oscillatoriales |
Family: | Microcoleaceae |
Genus: | Trichodesmium Ehrenberg ex Gomont, 1892 |
Species | |
Trichodesmium contortum |
Trichodesmium, or "sea sawdust", is a genus of filamentous cyanobacteria. They are found in nutrient-poor tropical and subtropical ocean waters.
They are most common around Australia and in the Red Sea, where they were first described by Captain Cook.
Trichodesmium is a diazotroph; that is, it fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. Trichodesmium is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally.[1][2]