I just learned that “Nitrogen-fixing cyanobacteria need only nitrogen and carbon dioxide to live.” I don’t think there is anything cyanobacteria cannot do. They are amazing. Click here to learn more or read an excerpt below.


Cyanobacteria are morphologically and physiologically diverse and broadly distributed in terrestrial and aquatic environments. Morphological groups include coccoid, filamentous nonheterocystous, and heterocystous genera. Heterocysts are specialized cells harboring nitrogen fixation, a process by which atmospheric nitrogen (N2) is converted to a biologically useful form (NH3). All heterocystous and some coccoid/filamentous cyanobacteria fix nitrogen. This enables cyanobacteria to exploit ecosystems devoid of nitrogen compounds, including those located in polar, open ocean, and desert regions. Cyanobacterial nitrogen fixation can be a significant source of biologically available nitrogen in these ecosystems.


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