Dinoflagellate 'blooms' (cell population booms) can create water discoloration (known as "red tides"), which can be hazardous to nearby marine life and aquaculture. Some dinoflagellate species create poisons that can kill both finfish and shrimp, as well as other consumers indirectly. The toxins can accumulate in seafood, causing health problems for humans who eat it.
Blooms are caused by the presence of single-celled organisms known as dinoflagellates. There are several different types of dinoflagellates, all of which contain poisonous chemicals called algicides. These chemicals prevent other bacteria from growing inside the dinoflagellate cell, so they have no need for a immune system like other organisms do. This allows the dinoflagellate to produce large amounts of toxic substances, which is why blooms can cause harm to animals far away from their source.
Certain dinoflagellate species can bloom so rapidly that they form dense "blooms" that can cause serious damage to ocean ecosystems and the fishing industry. In addition to red tides, which are caused by the presence of certain dinoflagellates, blooms of another type of dinoflagellate can produce neurotoxins that can be fatal to humans if they come into contact with them. This phenomenon has caused concern among scientists who fear that it may one day lead to new sources of cancer or neurological diseases.
Dinoflagellates are also responsible for some of the bioluminescence found in the water. Several species may grow fast under certain conditions, resulting in water blooms or red tides that colour the water and may damage fish and other creatures. The danger to humans is mainly due to the toxins these organisms produce.
Dinoflagellates are single-celled organisms that belong to a group called protists. They are related to plants and algae but are not bacteria. They can be free-living or they can live inside of other organisms, such as bacteria or shellfish. Shellfish infected with toxic strains of dinoflagellates can release those toxins into their meat when they die. This is why it is important to eat only well-cooked shellfish.
Some species of dinoflagellates produce toxins that can cause illness in humans. These toxins can be absorbed through the skin or ingested through the mouth. If you come into contact with water contaminated with these organisms, then you should avoid eating any raw or partially cooked seafood from that area until further information is available about its safety.
People who are allergic to shellfish may have an adverse reaction to these toxins, including itchy hives, severe asthma, or an anaphylactic shock. Those who suffer from one of these conditions should not touch any form of seafood until further notice from their doctor.
Dinoflagellate blooms cause "red tides," which harm marine life. Dinoflagellates have the most dramatic impact on their surroundings in coastal waters during the warmer season, which is generally mid-to-late summer. This high density can cause the water to become golden or crimson, resulting in a "red tide."
The bloom itself is made up of single-cell organisms called dinoflagellates. They are classified into two groups: those that contain toxins and those that do not. If you eat any part of the organism, you could be harmed by the toxin it contains. The best protection against toxic red tides is to avoid contact with them by staying out of the water during their peak days (usually early in the morning or late at night), and knowing how to identify poisonous organisms.
There are several types of poisons found in marine toxins. Some examples are tetrodotoxin, which is found in shellfish from Japan; ciguatoxin, which is found in fish from tropical regions of the world; and domoic acid, which is found in certain algae. These substances can be harmful if ingested. There are also antibiotics in nature. For example, saxitoxin is an antibiotic found in algae. It can be toxic if it enters your body through your mouth, nose, or skin, so handling seafood without washing your hands first is not safe.
Dinoflagellates are alveolates with two flagella, which is the ancestor of bikonts. A fast concentration of some dinoflagellates can generate a noticeable colour of the water, known popularly as "red tide" (a toxic algal bloom), which can induce shellfish poisoning if people consume infected shellfish. Toxic blooms are sometimes controlled by fishing out the affected organisms or by closing beaches to prevent more being taken ashore.
Some species of dinoflagellates produce toxins that can cause illness in humans and animals. The best-known example is Alexandrium catenella, which contains saxitoxin, which causes paralytic shellfish poisoning. Other species have been shown to contain domoic acid, which can be harmful when consumed by humans or marine mammals.
Certain types of dinoflagellates are important food sources for many fish and other aquatic organisms. Fish attract more prey items when they eat together in large groups called "shoots". Some fish also eat individual dinoflagellates but usually only when there is not enough food around to suit them all. This habit helps protect the fish from eating too many poisonous organisms.
Dinoflagellates reproduce both asexually and sexually. They consist of a nucleus with genetic material surrounded by a cell membrane. The membrane may have pores that allow molecules to pass into the nucleus, but not vice versa.
Red tides are regular occurrences in warm, polluted coastal waters. They arise when populations of dinoflagellate algae burst to massive proportions. The water turns red because the dinoflagellates have red plastids. Dinoflagellates use extreme environmental conditions that kill out other creatures. They can survive for several days or even weeks inside of their shell before rupturing it and releasing its contents into the water.
Dinoflagellates are responsible for some serious human health issues as well as damage to property. Red tides often cause panic among those who see the red coloration of the water and assume something dangerous is present. However, this phenomenon is not harmful to humans nor any other species except for the dinoflagellates themselves. There are ways to prevent harm to humans caused by red tides; simply stay away from contaminated areas and follow local government recommendations for clean water intake sites.
Additionally, red tides can cause problems for various marine animals. For example, a red tide event in 1998 caused a major problem for sea turtles in Florida. The red-colored water blocked out light which normally attracts fish. Without food, the turtles were unable to find nourishment and many died. Scientists believe that this incident may have affected more than 100,000 individuals.
Finally, red tides can be detrimental to marine ecosystems because they use up important nutrients that would otherwise contribute to plant growth.