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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, sometimes called a red tide in marine environments, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to ...
In freshwater ecosystems, algal blooms are most commonly caused by high levels of nutrients (eutrophication). The blooms can look like foam, scum or mats or like paint floating on the surface of the water, but they are not always visible. Nor are the blooms always green; they can be blue, and some cyanobacteria species are coloured brownish-red.
A harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, mechanical damage to other organisms, or by other means. The diversity of these HABs make them even harder to manage, and present many issues, especially to threatened coastal areas. [ 33 ]
The blooms that produce the toxin result from a specific type of algae. Once the toxin is produced, smaller fish can eat the algae. Bigger animals like sea lions can then become sick from the ...
More health hazards come to light from toxic algae bloom exposure, while new technology is making waves to battle the bloom. 'It smells like death.' Toxic algae blooms, new health hazards — and ...
Toxic algae blooms in Pierce County lakes are risky for pets and animals, ... In animals, nerve toxins cause weakness, difficulty breathing, staggering, convulsions and death. Signs of nerve ...
It contains some of the dinoflagellate species most harmful to humans, because it produces toxic harmful algal blooms (HAB) that cause paralytic shellfish poisoning (PSP) in humans. There are about 30 species of Alexandrium that form a clade, defined primarily on morphological characters in their thecal plates. [1]
These blooms, also called red tides, cause extensive ecological and economic damage. What causes these harmful algal blooms is still poorly understood. [1] Karenia brevis is of particular importance to humans because it also can cause neurotoxic shellfish poisoning (NSP) and respiratory distress through accumulation of toxins in tissue. [1]