How is the red tide formed, and what is the harm to him?

The water body contains too much potassium, phosphorus and other nutrients, which leads to eutrophication of the water body, and the algae bloom and eventually form red tides. Red tides can disrupt the balance of aquatic ecosystems and reduce species diversity.

Red tide. The harm caused is manifold, such as destroying the ecological balance, destroying fisheries, affecting human health, etc.

1. Destroying the ecological balance.

The ocean is a complex ecosystem.

Organisms and the environment, and organisms and organisms are interdependent and mutually restrictive. The circulation of matter and the flow of energy in the system are relatively stable and dynamically equilibrated. When there is a red tide, this developmental equilibrium is defined by chemical oxygen consumption.

The development and change of such environmental factors have made marine life in a number of countries.

The technology was unable to grow, develop and reproduce properly, causing some students to flee or even die, thus destroying the original ecological balance.

2. Destruction of fisheries.

The main causes of damage to fish, shrimp and shellfish caused by red tides are as follows:

1.Destruction of the bait base of the fishery leads to a decrease in fishery production.

2.The abnormal psychological development and reproduction of red tide organisms will cause the valves of economically developing organisms such as fish, shrimp, and shellfish to be blocked by mechanical systems, causing our research organisms to suffocate.

3.In the late stages of the red tide, a large number of red tide creatures die. Under the decomposition of bacteria, it can cause severe oxygen deficiency in the environment or produce hydrogen sulfide.

and other harmful substances, so that marine organisms lack oxygen or poison to die.

4.Some red tide bodies or metabolite structures contain biotoxins that directly kill fish, shrimp, shellfish, and other organisms.

3. The impact of red tides on human health.

Some red tide organisms secrete red tide toxins, when fish and shellfish are in the toxic red tide area, ingestion of these poisonous organisms, although they cannot be poisoned, but the biological toxins can accumulate in the body, and their content greatly exceeds the acceptable level of the human body when eating.

Further information: The impact of red tide can be treated in the following ways:

1. Physical Law.

One of the internationally recognized methods of the clay method is the paving clay method. Red tide organisms are removed by the flocculation of clay particles on red tide organisms. When the clay concentration reaches 1000 mg l, the removal rate of red tide algae can reach about 65%.

In small test sites, removal rates of up to 95% to 99% have been reported.

2. There are three main methods of biological control of red tides.

1: Control algae with fish.

Grow; 2: Use of aquatic higher plants to control eutrophication and algae;

3: Microorganisms are used to control the growth of algae. Microbial algae control is the most promising method of biological algae control due to the ease with which microorganisms multiply. These algaecidal microorganisms mainly include bacteria (algaelytic bacteria) and viruses (bacteriophages).

Protozoan. Fungi and actinomycetes.

From this, we can see that red tides are not only harmful to fisheries and oceans, but also to human beings. Therefore, we should pay more attention to environmental issues and use appropriate methods to deal with them.

These red tides destroy the ecological fabric of the ocean;

The secretions of these red tide organisms interfere with the normal breathing of marine fish, shrimp and shellfish, resulting in suffocation and death;

Red tide organisms containing toxins can cause poisoning and death when ingested by marine organisms; Food poisoning can also occur when humans consume seafood containing toxins;

The decomposition process of the corpses of these red tide organisms after death consumes a large amount of dissolved oxygen in seawater, creating an oxygen-deficient environment and causing a large number of shrimp and shellfish to die.

Main ways: 1. When red tide occurs, the high-density red tide organisms in the seawater cover or adhere to the respiratory organs of marine animals, causing breathing difficulties and suffocation death of marine animals;

2. The respiration of a large number of red tide organisms (especially at night, no photosynthesis produces oxygen) and the decomposition of dead cells consume a large amount of dissolved oxygen in seawater, which makes the water body seriously hypoxic, resulting in the death of marine organisms;

3. In the process of red tide decay, a large number of harmful gases (such as hydrogen sulfide) and toxins will be released, which will seriously pollute the marine environment and even lead to the death of marine animals;

4. Some red tide species, such as Pfiesteria piscicida (scientific name: Pfiesteria piscicida), will not only release toxins to poison fish, but also directly contact the fish body to eat fish meat;

5. Some red tide organisms contain fish poison or shellfish poison, which is harmless to the fish or shellfish that ingest them, but will accumulate in the body of the eater, causing poisoning to marine predators and humans who eat these fish or shellfish. At present, the known red tide biotoxins include paralytic shellfish poisoning (PSP), neurological shellfish poisoning (NSP), diarrheal shellfish poisoning (DSP), amnesia shellfish poisoning (ASP) and cigar fish poisoning (CFP).

Organism type. The types of red tides are quite diverse, and environmental conditions such as water temperature and salinity will determine the types of red tides. At present, 63 species of plankton, 24 species of diatoms, 32 species of dinoflagellates, 3 species of cyanobacteria, 1 species of golden algae, 2 species of cryptoalgae, and 1 species of protozoa have been discovered.

Red tide. Also known as red tides, it is certain phytoplankton and protozoa in seawater under specific environmental conditions.

or harmful ecological phenomena caused by explosive proliferation or high aggregation of bacteria and discoloration of water bodies.

Red tide is an anomaly in the marine ecosystem, it is not always red, depending on the number and type of organisms that cause it, the ocean water is red, yellow, green and brown.

Red tide is a complex ecological anomaly, and the causes of its occurrence are also complex. Although there is no conclusive conclusion on the mechanism of red tide, the primary condition for the occurrence of red tide is that the proliferation of red tide organisms must reach a certain density, otherwise, although other factors are suitable, red tide will not occur, and under normal physical and chemical environmental conditions, red tide organisms are plankton.

Some flagellates (or dinoflagellates.

Or some fish and shrimp food. However, due to special environmental conditions, some red tide organisms are overpopulated and formed red tides. Most scholars believe that the occurrence of red tides is closely related to the following environmental factors.

Human activity. With the rapid development of modern chemical and agricultural production, the population in coastal areas has increased, and a large amount of industrial and agricultural wastewater and domestic sewage have been added.

A considerable part of it is discharged into the ocean without treatment, resulting in eutrophication of offshore and harbor waters.

The severity is getting worse. At the same time, due to the increase in the degree of coastal development and the expansion of marine aquaculture, it has also brought about the pollution of the marine ecological environment and the aquaculture industry itself. The development of the maritime industry has led to the introduction of exotic harmful red tide species; Changes in the global climate have also led to the frequent occurrence of red tides. Self-pollution from mariculture is also one of the factors that induce red tide.

Marine eutrophication is the material basis and primary condition for the occurrence of red tides.

Changes in hydrometeorological and seawater physicochemical factors are important reasons for the occurrence of red tides.

Self-pollution from mariculture is also one of the factors that induce red tide.

How is red tide formed? Red tides are formed by some uh-red algae in that sea water that lives in the nutrient-rich water.

First, it is a large number of red tides.

Organisms accumulate in the gills of fish, causing fish to suffocate and die due to lack of oxygen;

Second, after the death of red tide organisms, the algae consume a large amount of dissolved oxygen in the water during the decomposition process, resulting in fish and other marine organisms.

Death due to lack of oxygen, making the normal ecosystem of the ocean.

Severe damage;

Third, fish swallow a large amount of toxic algae, which can cause fish death;