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Nodularia is a genus of filamentous nitrogen-fixing cyanobacteria, or blue-green algae. [1] They occur mainly in brackish or salinic waters, such as the hypersaline Makgadikgadi Pans, [2] the Peel-Harvey Estuary in Western Australia or the Baltic Sea. Nodularia cells occasionally form heavy algal blooms.
The name "cyanobacteria" (from Ancient Greek κύανος (kúanos) 'blue') refers to their bluish green color, [7] [8] which forms the basis of cyanobacteria's informal common name, blue-green algae, [9] [10] [11] although as prokaryotes they are not scientifically classified as algae.
Blue green algae growing on the substrate of a fresh water aquarium. Although colloquially called algae, blue-green algae (BGA) is a type of cyanobacteria. It can present with several different colors. While there are many BGA species, the most common type found in aquaria is referred to as "slime algae".
Microcystins—or cyanoginosins—are a class of toxins produced by certain cyanobacteria, commonly known as blue-green algae. [3] Over 250 [4] different microcystins have been discovered so far, of which microcystin-LR is the most common. Chemically they are cyclic heptapeptides produced through nonribosomal peptide synthases. [5]
If you have other health questions or concerns about blue-green algae blooms, please call the Florida Department of Health in Okeechobee County at 772-873-4927.
The protoplast is a light blue-green color, appearing dark or brown due to optical effects of gas-filled vesicles; this can be useful as a distinguishing characteristic when using light microscopy. These vesicles provide the buoyancy necessary for M. aeruginosa to stay at a level within the water column at which they can obtain optimum light ...
This group of viruses includes the original cyanophage isolate that infected "blue-green algae". [ 13 ] [ 3 ] Cyanophages in this group are easy to isolate from the environment. [ 3 ] They carry short non-contractile tails and cause lysis of several species within three genera of cyanobacteria: Lyngbya , Plectonema and Phormidium . [ 3 ]
O. princeps is dark blue green in colour due to the presence of two phycobilin pigments: phycocyanin and phycoerythrin. Individual filaments, called trichomes, are blue green to olive green in colour. Mature trichomes are straight and unconstricted in growth phase.