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Gonyaulax is a genus of dinoflagellates, which are single-celled algae found in marine and freshwater environments. Some species of Gonyaulax can produce toxins that can cause harmful algal blooms, known as red tides, which can be harmful to marine life and humans if consumed.
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What has the author Shaoul Ezekiel written?
Shaoul Ezekiel has written: 'Spectrofluorometric differentiation of the red tide alga, Gonyaulax tamarensis from other algae common to New England waters' -- subject- s -: Red tide, Fluorescence spectroscopy, Dinoflagellates
Do protozoa photosynthesis?
Yes in fact, may protists do undergo photosynthesis. For example, the euglena. It is what is called photoautotrophic because it uses light as an energy source (photo-) and its carbon source is CO2 (-autotrophic).
Can red tide kill a person?
Marine and fresh waters teem with life, much of it microscopic, and most of it harmless; in fact, it is this microscopic life on which all aquatic life ultimately depends for food. While most of these species of phytoplankton and cyanobacteria are harmless, there are a few dozen that create potent toxins given the right conditions. Harmful algal blooms may cause harm through the production of toxins or by their accumulated biomass, which can affect co-occurring organisms and alter food-web dynamics. Impacts include human illness and mortality following consumption of or indirect exposure to HAB toxins, substantial economic losses to coastal communities and commercial fisheries, and HAB-associated fish, bird and mammal mortality's To the human eye, blooms can appear greenish, brown, and even reddish- orange depending upon the algal species, the aquatic ecosystem, and the concentration of the organisms.No deaths of humans have been attributed to Florida red tide, but people may experience respiratory irritation (coughing, sneezing, and tearing) when the red tide organism (Karenia brevis) is present along a coast and winds blow its toxic aerosol onshore. Swimming is usually safe, but skin irritation and burning is possible in areas of high concentration of red tide.In 1972 a red tide was caused in New England by a toxic dinoflagellate Alexandrium (Gonyaulax) tamarense.In 2005 the Canadian red tide was discovered to have come further south than it has in years prior by a ship called The Oceanus, closing shellfish beds in Maine and Massachusetts and alerting authorities as far south as Montauk (Long Island, NY) to check their beds. Experts who discovered the reproductive cysts in the seabed warn of a possible spread to Long Island in the future, halting the area's fishing and shellfish industry and threatening the tourist trade, which constitutes a significant portion of the island's economy. (Source Wikipedia)
