| 释义 |
red tide
red tiden. A bloom of plankton, especially dinoflagellates, that causes a usually reddish discoloration of coastal ocean waters. Certain dinoflagellates produce toxins that contaminate shellfish, making them unsafe to eat, and can kill fish.red tide n (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 red′ tide′
n. a brownish red discoloration of marine waters caused by a huge aggregation of flagellates, esp. dinoflagellates, that often produce a potent neurotoxin that contaminates shellfish. [1900–05] red tide A population explosion of certain species of dinoflagellates, a kind of protozoan found in plankton. The dinoflagellates color the water red or reddish-brown, and secrete a toxin that kills fish. Red tide usually occurs in warm coastal waters.Thesaurus| Noun | 1. | red tide - seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxinbrine, saltwater, seawater - water containing salts; "the water in the ocean is all saltwater" |
red tide
red tide1. Any large concentration of algae drawn up from the sea and collecting on the surface of a body of water, though it may not be exactly red in color and is not dependent on or related to the tides. An unusual number and intensity of storms in this region has contributed to a near-constant presence of red tide, which is frustrating beachgoers and threatening the fishing industry. The sharp uptick of respiratory problems in the seaside town has been blamed on the red tide that has been present ever since the hurricane last month.2. slang A menstrual period. Potentially offensive if used by anyone other than the one menstruating. Sorry for being so snappish with you, I'm just having my red tide at the moment. A: "I bet she's just down with the red tide." B: "Jeff! Don't say something so presumptuous and crass!"See also: red, tidered tide n. a menstrual period. (Punning on the name of a tidal phenomenon where the water appears reddish owing to the presence of certain kinds of microscopic creatures.) Sorry, she’s down with the red tide and really prefers to stay home. See also: red, tidered tide
red tide: see Dinoflagellatadinoflagellata
, phylum (division) of unicellular, mostly marine algae, called dinoflagellates. In some classification systems this division is called Pyrrhophyta. There are approximately 2,000 species of dinoflagellates.
..... Click the link for more information. .red tide[′red ′tīd] (biology) A reddish discoloration of coastal surface waters due to concentrations of certain toxin-producing dinoflagellates. Also known as red water. red tide
red tidenatural (and common) phenomenon causing massive extermination of fish and other marine life; caused by algae Karenis brevis or efflorescence of Pfeisteria piscicida. [in high concentrations of organism, water turns reddish-brown] red tiden. A bloom of plankton, especially dinoflagellates, that causes a usually reddish discoloration of coastal ocean waters. Certain dinoflagellates produce toxins that contaminate shellfish, making them unsafe to eat, and can kill fish.Environment Harmful algal bloom A body of sea water with high concentrations of dinoflagellates, in which massive algal proliferation imparts a reddish colour to the surface, first described in the Gulf of Maine—US
Management Supportive
Under optimal salinity, temperature and nutrient conditions, marine algae, Gonyaulax catanella and G tamarensis proliferate, producing saxitoxin—a potent neuromuscular toxin that blocks voltage-dependent sodium channels in neurons; not all red tides are toxic and some outbreaks of ‘red tide disease’ occur without the red tide; Gymnodinium breve causes red tide off Florida and in the Gulf of Mexico, but evokes milder neurotoxic reactions—e.g., paraesthesias, abnormal temperature sensation, ataxia, nausea, vomiting and diarrhoea. Saxitoxin concentrates in clams and shellfish—but not in lobster or finned fish; birds, mammals, humans feeding on the shellfish rapidly develop neuromuscular blockade with intense centripetal paresthesias, nausea, vomiting, diarrhea, later vertigo, numbness of face and scalp, sensory loss, dysphagia, dysarthria, intention tremor; if severe, intoxication may cause flaccid quadriplegia or respiratory paralysis and death
Infectious disease A popular phrase from the 1950s that died in the 1960s, for the increased prominence of gram-negative—i.e., ‘red’—bacterial infections, attributed to the indiscriminate use of the first antibiotic, penicillin—which is most effective against gram-positive cocci for most infections—resulting in a relative increase in incidence of gram-negative bacterial infections, causing a ‘red’ shiftred tide (red tīd) A natural phenomenon resulting from higher than normal concentrations of the microscopic algae Gymnodinium breve in seawater. When the causative organism is extremely concentrated, seawater can turn a reddish-brown color. red tide a bloom of DINOFLAGELLATES which literally turns the sea red. The toxins produced by them, concentrated in shell-fish which may feed upon them, can be fatal to humans.FinancialSeeTidered tide
Words related to red tidenoun seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxinRelated Words |