A proliferation of a marine plankton toxic and often fatal to fish, perhaps stimulated by the addition of nutrients. A tide can be red, green, or brown, depending on the coloration of the plankton.
The term applied to toxic algal blooms caused by several genera of dinoflagellates (Gymnodinium and Gonyaulax) which turn the sea red and are frequently associated with a deterioration in water quality. The color occurs as a result of the reaction of a red pigment, peridinin, to light during photosynthesis. These toxic algal blooms pose a serious threat to marine life and are potentially harmful to humans. The term has no connection with astronomic tides. However, its association with the word "tide" is from popular observations of its movements with tidal currents in estuarine waters.
A phenomena that occurs near the surface of the sea and is caused by an abnormal growth of dinoflagellates, single-celled plankton. The toxin secreted by the dinoflagellates is capable of killing fish through a cyclic effect. As decomposition continues, it creates more nutrients, which feed the plankton bloom, and the greater quantities can color the water red.
Discoloration of surface waters, most frequently in COASTAL ZONES, caused by large concentrations of microorganisms.
an algal bloom that produces a toxin which is concentrated in bivalve molluscs; other shellfish such as crabs and shrimp are not affected. Eating contaminated bivalves can lead to paralytic shellfish poison (PSP) a serious illness that may be fatal. This toxin is not destroyed by cooking. Phone the shellfish line at 666-2828 for updated information on closures.
A discoloration of the sea caused by an outbreak of toxic red dinoflagellates.
a red patch of sea water caused by high concentrations of dinoflagellates, toxins released by the dinoflagellates can make the water poisonous to other marine organisms
a red or brown discoloring of surface waters, usually in coastal regions, caused by extremely high concentrations of plankton (often dinoflagellata). The poisonous substances produced by the algae result in a massive number of fish and marine mammal deaths and illnesses, and the decomposition of algae at the end of the cycle robs the water of large amounts of oxygen.
seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin
a dense population of aquatic microscopic organisms that breed in the abundance of salt in surface water
a higher-than-normal concentration of a microscopic alga
ocean waters colored by the dramatic increase of dinoflagellates that cause fish kills and paralytic shellfish poisoning
red coloration, usually of coastal waters, caused by large quantities of phytoplankton; some red tides are caused by polluted waters, other are not.
a reddish discoloration of coastal surface waters due to concentrations of toxic producing algae, fatal to many forms of marine life.
A red coloration of coastal waters that is caused by dense outburst of phytoplankton (usually dinoflagellates). Some red tides result in mass fish deaths, others contaminate shellfish, and still others produce no toxic effects.
algal blooms that causes the water to turn a reddish color (some blooms may be other colors or no colors); some dinoflaggelate species produce the toxic alkaloid saxitoxin.-Reductase - enzyme that converts testosterone to its more potent androgenic metabolite dihydrotestosterone.
Discolouration of surface waters from blooms of phytoplankton. Strictly refers to blooms that produce a reddish-brown colour but often used for blooms of other colours. (see also algal bloom)
A dense outburst of phytoplankton (usually dinoflagellates) often coloring water red brown.
Reddish-brown discoloring of surface water from blooming populations of dinoflagellate phytoplankton; since long associated with nutrient pollution.
A reddish-colored carpet of algae that appears below the surface of the sea and is eaten by clams, mussels and oysters. The algae secrete a substance that can be toxic to humans. Fishing grounds are closed when red tide occurs, preventing the harvest of any contaminated shellfish.
A sudden 'bloom' of toxic micro-organisms that multiply so quickly that they stain the water red. These micro-organisms are concentrated in filter-feeding animals such as bivalves. People that eat such animals may become seriously ill. More on the bivalve fact sheet.
A noticable red or brown discoloration of sea water caused by excessive amounts of nutrients that lead to the growth of microscopic algae. These algae decay and leads to loss of clarity and oxygen depletion, which may kill or restrict fish, shellfish and other marine organisms. Graphic
A bloom of phytoplankton, usually dynoflagellates.
a reddish discoloration of coastal surface waters due to concentrations of certain toxin-producing dinoflagellates [marine plankton
An overgrowth of one of a number of dinoflagellates that causes discoloration of the water. Some organisms that cause red tides can release neurotoxins.
The proliferation of a toxic marine plankton that often causes fish kills and can contaminate certain edible shellfish. Red tide is a natural phenomenon that can be stimulated by the addition of nutrients.
"Red Tide" is a common name for a phenomenon whereby, under certain conditions, a species of algae that contain reddish pigments reproduces quickly and produces huge numbers of algae (i.e. "blooms") such that the water appears to be colored red. Although most such species of algae do not produce toxic chemicals, some do, and the term "red tide" has come to mean the blooming of a toxic form of red-pigmented algae that can be transmitted through the aquatic food chain and harm higher organisms including fish, marine mammals, and even humans that feed either directly or indirectly on them.
Red tide is a periodic massive bloom of toxin-producing marine algae, causing Gulf Waters to appear red and fish to suffocate. People with asthma or respiratory conditions should avoid red tide areas, as it can cause eye, nose and throat irritation and difficulty in breathing.
Reddish-brown discoloring of surface water coloration of sea water caused by a bloom of dinoflagellate phytoplankton or other microscopically minute plants and animals.
A population explosion or bloom of minute, single-celled marine organisms called dinoflagellates. Billions of these cells can accumulate in protected bays where the toxins they contain can poison other marine life.
Red tide is a common name for a phenomenon known as an algal bloom, an event in which estuarine or marine algae accumulate rapidly in the water column, or "bloom". These algae, more correctly termed phytoplankton, are microscopic, single-celled, plant-like organisms that can form dense, visible patches near the water's surface. Certain species of phytoplankton contain photosynthetic pigments that vary in color from green to brown to red, and when the algae are present in high concentrations, the water appears to be colored red.
