What happened after blue tears appeared in history?

The name "Blue Tears" sounds romantic and beautiful, but I don't know that this is a phenomenon caused by a large number of algae gathering after the ocean is polluted. If not controlled, these algae will absorb a lot of oxygen and nutrients in the ocean, posing a threat to marine life. In addition, the life span of these algae is relatively short, and the pollution of seawater after a large number of dead algae rot can not be ignored. Therefore, people must pay attention to environmental protection, otherwise, once the marine ecology deteriorates, people living on land will suffer the most.

There is a marine microorganism, its name is Noctiluca.

As night falls, even the sea is "dyed" black. Only they, noctiluca scintillans, gather together, emitting faint blue light and illuminating the beach. They are night elves, fireflies in the sea, more like blue tears dripping from the sea.

In China, the United States, Belgium, Malaysia and other places, there have been such dreamy blue tears. People have always been curious, how does the luminous lamp shine?

Nocturnal algae can emit light because it has a fluorescein-luciferase system in its body, which is really similar to the principle of firefly emission!

In a "fluorescent bay" in Puerto Rico, Latin America, people have made new discoveries.

If you stir the sea by hand at night, the night light on the sea will shine. Such a scene is both beautiful and interesting, but the luminous glow is not for showing off, but ..... it's scared!

Scientific research shows that noctiluca scintillans actually glows for self-protection. The beautiful scenery you see is just that they are "afraid". Can glow protect yourself? Of course. The natural enemies of noctiluca include small marine animals such as shrimps, and sudden luminescence can scare them away. More importantly, however, noctiluca scintillans can still glow in shrimp even if it is eaten, which points out the direction for squid, the main natural enemy of shrimp.

"A shrimp is swimming in the sea. It hasn't eaten for days. Suddenly, a faint light appeared on the distant sea. That's the smell of food! Shrimp swam over without hesitation, and sure enough, something was shining here. They are noctiluca scintillans, the favorite of shrimp. The shrimp caught a luminous shrimp and swallowed it. The taste of delicious food makes it swim forward with noctilucent algae. One, two, three ... That shrimp doesn't know how much it ate, and its transparent body is also illuminated by the swallowed noctiluca. Shrimp fills the stomach, but something terrible has happened! A squid saw the glowing shrimp. It was hungry for several days. Although my eyesight is poor and I can't see you clearly in the dark sea, today you actually send your own light to your door. Squid wants to. So, relying on the noctilucent algae in the shrimp, the squid caught and ate the shrimp effortlessly. Then, after a hearty meal, the squid swam away contentedly. In the distance, more luminous lights glow proudly. "

Nocturnal algae attract squid by emitting light to protect themselves from shrimp. Shrimp eats noctiluca scintillans and squid eats shrimp, which is a common food chain in marine system. As the saying goes, the enemy of my enemy is my friend, which seems to be true.

Although the luminous phenomenon of noctiluca scintillans is so beautiful, when the concentration of noctiluca scintillans is very high, the ocean will pay the price for beauty-red tide. This is a harmful biological phenomenon. Overdense algae consume a lot of oxygen in seawater, and also cover or attach to the respiratory organs of marine fish, shrimp and shellfish, causing marine animals to suffocate and die, and then rot and stink. In a few days, the once sparkling sea will become smelly.

There are many factors that cause red tide, the most important of which is sewage discharge. More than 30 countries or regions in the world have been harmed by red tides to varying degrees. Therefore, when you see beautiful "blue tears", it is actually a signal that the ocean is unhealthy.

To talk about this problem, we must first understand what this "blue tear" is. Speaking of "blue tears", I believe that the answers that most netizens think of are "different" from the real answers, and they may think that they are colored diamonds, jewels, or blue liquids. But these are not, but the blue color in Blue Tears does exist.

"Blue Tears" is actually a microorganism that emits blue light. The light emitted by this microorganism is like beautiful "blue tears". As the rising waves hit a string of blue cold light, it is romantic and novel under the starry sky! It has also become one of the most beautiful scenery on the earth where we live. However, if this microorganism breaks out in a large area, it will form a red tide and endanger the fishery.

Speaking of red tide, I believe many friends know it. Mozi gives a brief introduction here and will talk about it in detail later. If a large number of red tides occur, it will lead to a large number of fish deaths. Here, let's talk about a cause of death. A large number of red tide organisms will gather in the gills of fish, which will lead to hypoxia and suffocation of fish and eventually die.

There is a structure called light-emitting gland in this microorganism, which will produce light blue light when stimulated by waves. For example, standing at the seaside with this firefly at night and patting the seawater will make them emit blue light, which is vividly called "blue tears" in Malaysia and Taiwan Province Province of China.

This firefly usually lives near the beach. It lies in the daytime and comes out at night. It lives in the sand layer at the bottom of shallow water. If you are stimulated at night, you will be "afraid", which will lead to being frightened and secreting luminescent substances. At night, the light emitted by fireflies is a great spectacle at sea.

But this kind of microorganism must survive in seawater, because they need energy from seawater to survive. If you leave the sea for less than 100 seconds, you will die. With the disappearance of energy and light, life will eventually end.

How does this microorganism glow? Because it contains fluorescein, ostracods will secrete yellow fluorescein and colorless luciferase after being disturbed by waves or other factors. The reaction between fluorescein and luciferase will transform chemical energy into light energy through chemical reaction, resulting in light blue light.

However, personal energy is relatively small and belongs to cold light. Also known as "blue tears". The phenomenon of "blue tears" has appeared in Pingtan East Peninsula in Fujian and Xiangshan in Zhejiang. The cycle of "blue tears" is unstable, generally from April to July, and generally disappears within 2-5 days on average.

"Blue Tears" itself is noctilucent algae, and fluorescent bands will appear on the beach or on the sea. It is said that noctiluca scintillans is a worldwide red tide organism. If there are too many noctilucent algae, it may mean that there will be red tides there.

The appearance of a large number of "blue tears" will pose a great threat to fish and endanger fisheries. Behind the beauty of Blue Tears is "hidden murder".

"Blue tears" may lead to red tide, which is very harmful to fish. According to historical records, red tide is a historical name and a disastrous water color anomaly. Not all red, but also green, yellow, brown, blue and so on. , is a general term for many red tides.

Red tide will destroy the normal ecological structure and production process of the ocean, thus threatening the survival of marine life. Destroy the bait base of fishing ground, leading to the reduction of fishery production. Fishermen who do mariculture will suffer losses because of red tides. However, the self-pollution caused by mariculture is also one of the factors that induce red tide.

Scientists believe that red tide is caused by organic pollution of coastal seawater. Under normal circumstances, the content of nutrients in the ocean is low, which limits the growth of phytoplankton. However, when domestic sewage, industrial wastewater (mainly food, paper-making and printing and dyeing industries) and agricultural wastewater containing a lot of nutrients flow into the ocean, nutrients will be enriched in the water body, resulting in eutrophication of the sea area.

At this time, the contents of nutrients such as nitrogen and phosphorus, trace elements such as iron and manganese, and organic matter in the water body are greatly increased, which will promote the reproduction of red tide organisms. When other physical and chemical factors in the sea area are conducive to the growth and reproduction of organisms, red tide organisms will multiply rapidly and form red tide.

A large number of red tide organisms gather in the gills of fish, causing fish to die of hypoxia and suffocation. After the death of red tide organisms, algae will consume oxygen in the water during the decomposition process, leading to the death of marine organisms such as fish due to hypoxia. The occurrence of red tide will also increase the viscosity of seawater, lead to the death and attenuation of plankton in non-red tide algae, and finally cause serious damage to the normal ecosystem of the ocean.

That was not the case. If a fish swallows a lot of toxic algae, it will lead to the death of the fish, but "blue eyes" are nontoxic algae. However, toxic algae will secrete toxins, which will seriously threaten our health and life safety if they finally reach our human mouth through the food chain.

"Blue tears" may cause red tide, which is a signal of marine pollution. The effective measures to prevent red tide are to prevent nutrient pollution, especially to control a large number of nutrient elements such as nitrogen and phosphorus from entering the water body. This may be "where misfortune and happiness depend, and where happiness and misfortune depend"! The beauty of Blue Tears is amazing, but there is probably a crisis behind it!

Nocturnal algae, sewage, waste gas, harmful substances are getting bigger and bigger, and there are more and more physical diseases. The future is worrying!

Sometimes, behind a beautiful story is a sad fact!

A few years ago, a photo of the "blue tears" fluorescent waves in Wadu Island, Maldives, which was misinformed by Penghu, Taiwan, shocked the whole world and aroused the crazy pursuit of tourists from all over the world. For a time, it seems that there is a sea, you can see blue tears and get the illusion of happiness!

The so-called "blue tears", also known as "blue sand", is actually plankton from a kind of "multi-spike oyster" and belongs to dinoflagellate community. They are neither plants nor animals, and most of them are distributed in warm seas. Glowing of oyster is a bioluminescence phenomenon. When it is washed ashore by the waves, it can only survive after leaving the sea 1000 years.

According to the research, when this kind of plankton multiply in large quantities, it will produce saxitoxin and scallop toxin which are toxic to other marine organisms, thus affecting the abnormal water quality of this water area, and even making these toxins accumulate in shellfish, causing food safety risks. But the over-breeding of the ocean is the biggest reason for the over-breeding of blue tears. Eutrophication means that the ocean discharges too much waste water, agricultural fertilizers and even automobile exhaust, forming a large amount of nitrogen or phosphorus, which provides nutrition for the reproduction of many toxic algae, thus absorbing a large amount of oxygen in the water, leading to the death of other organisms due to hypoxia, resulting in the imbalance of marine ecology.

With the global climate anomaly and the deterioration of natural ecosystems, marine protection has been paid more and more attention. With the constant appeals and propaganda of governments and international organizations, most countries agree to increase the area of global marine protected areas to 10% by 2020. At present, the area of marine reserves in Taiwan Province Province accounts for 47% of the sea area 12. In addition to relying on the legal constraints of the official government, it is necessary to unite the strength of the people in order to implement it effectively and permanently.

Blue tears in many places in Zhejiang Province

In the dark, the coast stretching for several kilometers is glowing with fluorescent blue. Is this a scene from a science fiction movie? In fact, it appeared in Ryan.

A few days ago, Ryan photographer Zheng Tongda photographed this phenomenon in Beiji Island. This fantastic landscape comparable to Avatar has also attracted many photographers from Wenzhou to Beiji Island to pursue the fantastic figure of "Fluorescent Sea".

On May 17, Zheng Tongda made an appointment with a photographer to go to Beiji Island. As night falls, the coast is brightly lit. When you walk in, there is blue in the light. "If the waves are big enough, you will see a blue creature being stirred in the air, like a firefly. When I stepped on it in the pool, the blue ripples rippled and exploded. " Zheng Tongda said that the more fluorescent things are, the more obvious the blue fluorescent effect is when they are hit by external forces.

According to the description and pictures, Su Xiong judged that this phenomenon was caused by nocturnal algae. Recently, the seawater temperature is suitable, and the sunshine is sufficient. There are currents in the middle and lower reaches of the Yangtze River, warm currents in Taiwan Province Province and warm currents in the western Pacific Ocean gathering in the waters of Beiji Island, so the biological activities here are abnormal, and a large number of noctiluca are gathered.

"In March, June and September of previous years, noctiluca has also appeared in Beiji Island. The public may not be able to see it. Only when the growth conditions are suitable can it appear. " Su Xiong said that noctiluca scintillans is a global red tide organism with a spherical shape. Its fluorescent band appears not only on the beach, but also on the sea. When it gathers in large numbers, it can be found that the sea water is pink during the day.

It is said that noctiluca scintillans is non-toxic, but if it breaks out in a large area, it will form a red tide and endanger the fishery.

In the past few months, dreamy blue tears have appeared on the beautiful beach of Pingtan Island in Fujian Province for many days. Tourists from all over the country waiting at the seaside sometimes wait until two or three o'clock in the morning to see the blue stars shining on the sea and take this rare scene. Visitors who see this scene think that glad you came!

"Blue Tears" is actually a microorganism living in the sea. It is a fluorescent animal, and its scientific name is Vargula hilgendorfii, also known as "facing the sea". It's only 3 mm long. This is a luminous marine plankton. The maximum wavelength of light depends on the pH value and salinity of water, and the wavelength varies between 448-463 nm. This means that light is dyed in different shades of blue. With the lapping sound of the waves, Yinghai, who lives in shallow sand, is brought to the beach by the waves, and emits light blue light under the stimulation of the waves, as if the stars in the sky had fallen into the sea. But the beauty of this moment can only exist for ten seconds. With the disappearance of "energy", the light of blue tears is also lost, and its life is over.

From April to July every year, blue tears appear from time to time on many beaches such as Pingtan, Fujian and Taiwan Province, China. Pingtan is one of the places with the most frequent blue tears along the southeast coast. As long as you are lucky, it will appear. Being in it is like being in a fairy tale, which is really beyond words.

At present, no organization or means can accurately predict whether blue tears will happen. If you want to chase blue tears, you can only come in the season when blue tears are high, no matter what the weather is, sunny, windy or rainy. On the other hand, no matter how good the weather is and how stuffy the south wind is, blue tears will still come. The most beautiful blue tears need time to wait.

When blue tears appear, most people will knock on the ground and touch the water with excitement. Although there is no research to prove that noctilucent contains toxins, it may be because everyone's physique is different, or because noctilucent contains bacteria, and some people's skin will have adverse reactions after contacting noctilucent, such as rash and itching! It's not that the sea water is polluted, it's just a matter of personal physique.

There will be blue tears every year, and there will be traffic jams behind, which is for sure.