Until he hung up the phone, Yang Meng had a shocked expression, looking like the end of the world.

Long Xixiang looked at Yang Mengzhen's appearance and asked puzzled, "What's wrong?"

Yang Meng held the phone with a face full of disbelief: "Call me quietly and say that her company wants to cooperate with me! I'll go! I said that one of her students asked me for so much money for what? It turned out to be a business!"

"What? Quietly opened a company, isn't she going to take the graduate school entrance examination?" Long Xixiang asked puzzled.

Yang Meng nodded: "She said that she opened a biotechnology company, knew that I was going to invest in the construction of a sports city, and wanted to talk to me about cooperation." ”

"What is the cooperation between the biotechnology company and you?" asked Long Xixiang, puzzled.

Yang Meng explained: "It is said to be an additive that improves the high-temperature performance of asphalt. ”

"That's also a chemical product, right? What does it have to do with biotechnology?" Zet on the side was confused.

Yang Meng blinked: "She said that the additive was extracted from crayfish shells." ”

"Crayfish?" Zette thought for a moment, "Oh, it's 'Crayfish', right?"

Yang Meng nodded: "That's it!" After speaking, he pointed to Anri Sakaguchi and Imai Monroe: "Their nightmare there." The most failed biological invasion in the history of our country. ”

With the development of nature, organisms generally form a fixed ecosystem, and a kind of organism leaves its original habitat to live in a new environment, which can easily cause catastrophe.

Australia, for example, has suffered from biological invasions.

What is the longest man-made structure in the world? Many people will answer without hesitation: the Great Wall. But in fact, this is not the case, but the fence of Australia: in order to prevent the invasion of rabbits, Australia once built a rabbit fence running through the north and south of Australia, and the result is 。。。。。。

Rabbits are born to make holes! And Australia also has strong winds and floods, etc., this anti-rabbit fence bird is not used!

Since 1859, a rotten farmer named Thomas Austin brought 24 rabbits to the Australian mainland, these rabbits have taken root in Australia, and by 1926 there were more than 10 billion rabbits in Australia!

In order to deal with these rabbits, Australia introduced the natural enemy of rabbits----- foxes, and after the foxes arrived in Australia, they found that it was simpler than hunting rabbits to prey on protists such as wombats that move slowly, so Australia began to eradicate foxes.

Later, in order to eradicate rabbits, Australia tried the method of spreading poison by the air force to eliminate rabbits. But dead rabbits don't breed as fast as they do. Moreover, those poisons have caused great damage to the natural ecology and have to be stopped.

The last solution that came to mind was to use myxoma virus biological warfare to destroy the rabbits. This virus inhabits the body of American rabbits, and this bacterium is not fatal to American rabbits, but it is a fatal disease to European rabbits! Thus, from 1950 to 1952, when the virus was introduced, 95 percent of the rabbit population in Australia was wiped out! The Australian rabbit plague finally came to an end.

Why is the word 'full stop' in quotation marks? Because the surviving rabbits have myxoma virus antibodies, Australian rabbits are still rampant.

Australian animal protection is called a terrible, but killing other animals may be illegal, but it is a rabbit that is killed?

This rabbit

The problem was finally solved, and other problems appeared: for example, the common Asian toad in the Han Kingdom, which is commonly known as the toad, may have fled to Australia due to shipping and other factors. And then it took root there and flooded.

Native reptile hunters in Australia, such as lizards and snakes, and so on, "Boom, that's good, the recipe is abundant!" And then......

The toxin in the body of the Asian toad has long been accustomed to Asian creatures, but it is a deadly poison for Australian creatures, and eating a toad directly kills them.

Basically, any foreign animal is fatal to Australia over there------ not to mention, now there are enough wild cats for them to drink two pots------ more than 200 million small animals die in the mouth of wild cats in Australia every year!

After all, it's vast and sparsely populated, and it's troublesome to deal with everything.

It is no exaggeration to say that Han is one of the most harmed countries in the world by biological invasions!

So far, 754 species of alien species have been recorded as fully invaded in Han China, of which 100 species are the most threatened alien species in the world according to the International Union for Conservation of Nature, and more than half of them have invaded Han China. The most important 11 of them cause more than 57 billion economic losses to the Han State every year!

For example, 'Fushou snail'.

In the southern waters, it is common to see a pink grape-like object on the reed pole of a rice field, and that is the eggs of the snail.

This thing is half the size of a palm, in the eighties and nineties of the last century, when eating meat was a luxury, this thing was introduced from South America to Han in 1981. Although the meat doesn't taste good, how do you say that? If you have hair, you are not bald, and if you have it, you can eat it!

But that being said, if this thing is not cooked properly, it can pose a threat to human health: it is an intermediate host for Accanthochordus and Angiostrongylus cantonensis, and there is a disease called 'Fushou snail disease', which refers to a series of symptoms such as meningitis and myelitis caused by parasites invading the central nervous system after eating Fushou snails.

Back then, people still regarded Fushou snails as a good thing, but now? I don't know how many farmers who grow rice and the like scold the street when they see this thing!

There is also the 'mosquito-eating fish', a small fish from North America, which is only three or four centimeters long, and this fish was introduced to eliminate mosquito larvae, and as a result, people prefer to eat the eggs and juveniles of other small fish, which leads to the extinction of many local small fish.

The same is true for plants, such as the 'water hyacinth', which is native to South America, which was introduced as pig feed at the time, but now it reproduces too quickly and covers the water, suppressing the growth of plankton, consuming a lot of oxygen, threatening the survival of fish, and blocking the shipping lanes。。。。。。 The direct economic loss caused by this thing is more than 10 billion every year!

Another point is that such biological invasions do not respect national borders.

For example, the bighead carp in the middle and lower reaches of the Yangtze River is commonly known as the 'fathead fish', and everyone loves the chopped pepper fish head. However, after arriving on the Yunnan-Guizhou Plateau, many local native fish have gradually been pushed to a dead end, and many of them have become extinct or are on the verge of extinction.

There is a saying in Han China, that is, 'foodies save the world', and rabbits can still be overflowing? braised rabbit meat, spicy rabbit meat, stewed rabbit, spicy rabbit head, stir-fried rabbit meat.

。。。。。 It's all down to think about it!

In fact, the Too young, too simple Tucson breaks!

Of the 754 species of invasive species recorded in the Han Kingdom, 134 species are microorganisms, most of which are insects, and the plants are those that are inedible such as 'water hyacinth'.

And even if it is delicious, the combat effectiveness of foodies will not solve the problem.

Take bullfrogs, for example!

Some people will say: how can bullfrogs be a threat? They're so expensive in the supermarket, right?

In fact, in the Han Kingdom, the annual losses caused by bullfrogs are as high as tens of billions! Ask yourself: How many people eat bullfrogs? Can these people eat bullfrogs as often as they reproduce?

In fact, nearly a century ago, there were bullfrogs in the Han Kingdom, but they could not reproduce, because there was a lot of meat for people to eat----- life was not easy at that time. Later, after the reform and opening up, South China engaged in 'all kinds of breeding', and bullfrogs were also used as the 'golden key' to make a fortune and were once again introduced to the Han Kingdom on a large scale. However, due to the poor taste of edible frogs such as 'tiger frog', 'black spotted frog' and 'thorn-breasted frog' compared to the native to the Han Kingdom, the market is too poor, and a large number of bullfrog farms have been abandoned, and those bullfrogs have flowed into nature, and the results can be imagined.

It eats everything: insects, snakes, rats, fish, turtles, shrimps, even small birds, even its own tadpoles when they are hungry!

Of course, there have been cases of invasive species failures, the most unsuccessful of which is the crayfish, commonly known as 'crayfish'.

There are many rumors on the Han Internet about how this thing came to be, such as what Dongying brought to destroy the agricultural products of the Han Kingdom, and it is also said that Dongying brought it to the Han Kingdom to dispose of the corpse。。。。。。

In fact, this statement is false.

At the earliest, in 1927, Dongying introduced 20 crayfish from the Stars and Stripes. Note: Only 20 of them.

What did they introduce this thing for? It was to breed and breed it as feed for bullfrogs! After all, they are all things from North America------ and the origin of bullfrogs is also North America.

For them, this introduction is 'temporary' and successful, because these crayfish reproduce quickly, which really solves the problem of breeding feed for those bullfrogs, which is a 'win-win'.

Three years later, a Dongying man built a bullfrog farm near Nanjing, and also brought crayfish to the Han Kingdom, and the crayfish took root in the Han Kingdom.

But crayfish, like bullfrogs, didn't flood back then.

Why is this happening? Hungry!

In those years, the days were bitter! Grassroots, bark, Guanyin, soil, these things can become life-saving food, and this crayfish reproduces quickly and tastes good, and it has simply become a life-saving treasure! As for the cooking methods of crayfish, there are endless clusters, and even a special crayfish food culture has been born.

And this thing is cheap, and it is not the same as the bullfrog, which requires a professional chef to cook it and is unacceptable to many people, this thing is loved by everyone, and in the summer, it is simply a pleasure to eat and drink beer with 'hemp small'. Now in the Han Kingdom, crayfish need to be farmed in large quantities to meet people's needs, accounting for more than ninety percent of the world's crayfish production. That's why it's known as 'the most failed invasive species in history'.

But in other countries, that's a different story.