(Environmental Science) a discoloration of sea water caused by an explosive growth in phytoplankton density: sometimes toxic to fish life and, through accumulation in shellfish, to humans.a brownish red discoloration of marine waters caused by a huge aggregation of flagellates, esp. Florida red tides are a manifestation of the larger growing environmental issue of harmful algal blooms (HABs) (Erdner et al. 'Red Tide' causes suspension of SEWA operations in Sharjah The algal bloom may also deplete oxygen in the waters and/or release toxins that may cause illness in … All rights reserved.a brownish-red discoloration of marine waters caused by the presence of enormous numbers of certain microscopic flagellates, especially the dinoflagellates, that often produce a potent neurotoxin that accumulates in the tissues of shellfish, making them poisonous when eaten by humans and other vertebrates.a discoloration of sea water caused by an explosive growth in phytoplankton density: sometimes toxic to fish life and, through accumulation in shellfish, to humans.A population explosion of certain species of dinoflagellates, a kind of protozoan found in plankton. red tide: natural (and common) phenomenon causing massive extermination of fish and other marine life; caused by algae Karenis brevis or efflorescence of Pfeisteria piscicida . Red tide usually occurs in warm coastal waters. n. A bloom of plankton, especially dinoflagellates, that causes a usually reddish discoloration of coastal ocean waters. Often deep red or brown in color, a typical red tide can be observed along a marine coast. Toxic substances released by these organisms into the water may be lethal to fish and other marine life. Delivered to your inbox!That funding would help enhance regional water storage capacity, and reduce polluted discharges from Lake Okeechobee, helping address the problems of blue-green algae and the,Bioluminescence expert Michael Latz from Scripps Institution of Oceanography discusses the most recent,This year, a group of local photographers decided to take the gamble after noting a spate of,Separately, a new law (SB 1552) provides $3 million a year for the next five years to the Florida Red Tide Mitigation and Technology Development Initiative to research the causes and impacts of,County Commissioner Brian Hammond likened the coronavirus to a hurricane and the.Another point brought up by Rose is that two other common killers of manatees,Post the Definition of red tide to Facebook,Share the Definition of red tide on Twitter,On 'Optometrist,' 'Ophthalmologist,' and Similar Terms,Merriam-Webster’s Great Big List of Words You Love to Hate.How to use a word that (literally) drives some pe...Build a city of skyscrapers—one synonym at a time. The dinoflagellates color the water red or reddish-brown, and secrete a toxin that kills fish. Red tide definition, a brownish-red discoloration of marine waters caused by the presence of enormous numbers of certain microscopic flagellates, especially the dinoflagellates, that often produce a potent neurotoxin that accumulates in the tissues of shellfish, making them poisonous when eaten by humans and other vertebrates. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors.Can you spell these 10 commonly misspelled words?Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!Learn a new word every day. These toxins are harmful to marine mammals, birds, and turtles. Red tide, said Noaa, is caused by “microscopic algae that produce toxins that kill fish and make shellfish dangerous to eat. When the causative organism is extremely concentrated, seawater can turn a reddish-brown color.She sprang into action when manatees paralyzed by the,The ministry is already working on a surveillance programme by satellites to monitor the biological activity on the UAE's west coast so as to react swiftly to tackle the,In the past, the Florida Department of Health has used reports of dead fish or birds (which eat contaminated fish) as an early warning mechanism for,People with more severe asthma showed greater changes in pre- and post-beach spirometry values during,Dictionary, Encyclopedia and Thesaurus - The Free Dictionary,the webmaster's page for free fun content,Reckoning with red tide: Q&A with Dr. Cynthia Heil: DIRECTOR OF THE RED TIDE INSTITUTE AT MOTE,Prediction Research of Red Tide Based on Improved FCM,Manatee emergency: when manatees are in trouble, rescuers rush to help,Ministry of Environment monitors algal bloom in UAE's waters,Illness associated with red tide--Nassau County, Florida, 2007,Toxic tides: another reason to worry about hurricanes,Investigations of Red Tides Along the Southern California Coast. Certain dinoflagellates produce toxins that contaminate shellfish, making them unsafe to eat, and can kill fish.A natural phenomenon resulting from higher than normal concentrations of the microscopic algae Gymnodinium breve in seawater. Other phenomena unrelated to tides but using the word tide are rip tide, storm tide, hurricane tide, and black or red tides. Published by Houghton Mifflin Harcourt Publishing Company. “Red tide” is the common name for what scientists now prefer to call “harmful algae blooms.” Harmful algae blooms (HAB) are the sudden proliferation of one or more species of microscopic plants (algae or phytoplankton), which live in the ocean and produce neurotoxins that can cause negative and sometimes fatal effects in fish, birds, marine mammals, and even humans. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020,Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Copyright © 2011. 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