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The prefix cyan comes from the Greek κύανoς meaning "a dark blue substance", [19] and usually indicates any of a number of colours in the blue/green range of the spectrum. Cyanobacteria are commonly referred to as blue-green algae. Traditionally they were thought of as a form of algae, and were introduced as such in older textbooks.
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means.
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.
For example, definitions of blooms have included when the concentration of chlorophyll exceeds 100 ug/L, [6] when the concentration of chlorophyll exceeds 5 ug/L, [7] when the species considered to be blooming exceeds concentrations of 1000 cells/mL, [8] and when the algae species concentration simply deviates from its normal growth. [9] [10]
The name "cyanobacteria" (from Ancient Greek κύανος (kúanos) 'blue') refers to their bluish green color, [5] [6] which forms the basis of cyanobacteria's informal common name, blue-green algae, [7] [8] [9] although as prokaryotes they are not scientifically classified as algae.
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The effects of chronic exposure to even low levels of microcystins are a concern due to the risk of toxicity to several organ systems. [ 1 ] [ 47 ] These toxic compounds are not produced by spirulina itself, [ 48 ] but can occur if spirulina batches are contaminated with other, toxin-producing, blue-green algae.
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