Is Nostoc an algae or a bacteria?

Nostoc, first discovered in the 19th century, is one of the most widespread phototrophic bacteria in the world. As a nitrogen fixer, these ... However, these algae can also cause problems for humans by growth on sport turf and buildings, and can lead to unpleasant odors in drinking water. read more

Nostoc is a member of the Blue-green Cyanobacteria actually. Nostoc is an aquatic microscopic beaded, chain-like organism. We have difficulty classifying it. It has bacterial features, but its cells contain a blue-green cyan pigment that allows it to capture light energy and photosynthesise like green algae. read more

Nostoc, genus of blue-green algae with cells arranged in beadlike chains that are grouped together in a gelatinous mass. Ranging from microscopic to walnut-sized, masses of Nostoc may be found on soil and floating in quiet water. read more

Nostoc can be found in soil, on moist rocks, at the bottom of lakes and springs (both fresh- and saltwater), and rarely in marine habitats. It may also grow symbiotically within the tissues of plants, such as the evolutionarily ancient angiosperm Gunnera and the hornworts (a group of bryophytes), providing nitrogen to its host through the action of terminally differentiated cells known as heterocysts. read more