Cyanobacteria strands. Coloured scanning electron micrograph (SEM) of the cyanobacterium Nostoc sp. criss-crossing the surface of a small rock. Nostoc

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Cyanobacteria strands. Coloured scanning electron micrograph (SEM) of the cyanobacterium Nostoc sp. criss-crossing the surface of a small rock. Nostoc is a filamentous organism that has the ability to fix atmospheric nitrogen, thereby playing a major role in soil fertility. It has a wide distribution and is commonly found in soil, on mud, rocks or other plants. It also forms the partner of a number of lichens. Cyanobacteria were among the first forms of life.

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Photo credit: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: algae, biological, biology, blue-green, coloured, cyanobacteria, false-coloured, microbiological, microbiology, nostoc, rock, sem, strand, strands