Review
According to Darwin 's biological development theory, the natural species elimination law is actually the survival of the fittest. Different species will undergo gene selection and development in this process, and finally gradually form a stable circle and form a relatively balanced biological chain relationship with other species.
All of this is adjusted by nature itself. Although it takes a long time, the structure is therefore very stable.
And with the development of human civilization, various external factors began to interfere with this natural development process, allowing many species to go to an ecological environment that did not originally belong to them, invading local species, and bringing great damage.
For example, more than a century ago, someone released 100 birds in the United States . According to the records, this move was actually to enrich the local species diversity, but he did not expect it to bring irreversible heavy consequences to the country, with direct economic losses of 800 million US dollars. So how did the matter happen?
Release of Starling
This bird released in the United States is called Starling. It is a relatively common bird in Europe. From the appearance, these birds are very beautiful. Both the luster and color of the feathers are very eye-catching. Purple and green are mixed together, which is very moving.
Moreover, their voices are very special. Not only do they have a good voice, they can also imitate various bird calls. Therefore, many people were very willing to buy and raise these birds at that time, just like training parrots to learn to make human sounds.
At that time, a staff member engaged in animal domestication in the United States discovered the special nature of the starling. He felt that this bird looked beautiful in appearance and sound. If it could enter the American ecosystem, it would definitely bring good changes. So soon after, more than 100 starlings were found and personally carried out a release activity in Central Park in New York.
This is also the first time that the starlings appeared in the sky above the United States. As time passed, the starlings did settle down successfully in the United States, but it was not until a while later that Americans realized the catastrophic nature of these birds.
In fact, starlings have clustered habits and have very strong reproductive ability. After they successfully entered the United States, they quickly adapted to the local environment. It can even be said that the climate here is very suitable for this kind of bird. In addition, it does not belong here, so starlings have no natural enemies at all.
Here, they will not encounter any external dangers at all. They will only look for food or hang out every day, and then complete their reproduction during mating season.
Under such conditions, the number of starlings began to grow on a large scale, and the expansion accelerated from the 100 at the beginning to more than 200 million now. If you are in the places where they gather, you can often see a spectacular collective takeoff. The airtight whole piece almost completely blocks the sky.
Species invasion
Walking on the streets of American cities, you often encounter this kind of bird. Although you may be attracted by their beautiful appearance and special voices, starlings are very annoying to them for Americans themselves.
In their eyes, these birds are simply like rogue bullies. In order to find enough food, they often invade people's farms and orchards, eating food and fruits cleanly, causing great losses to agricultural production.
But it is not easy to drive away or remove them, because they always find the right time to start destroying them. Once they are driven away, they will run away immediately. No one can do anything about them.
In addition to these, starlings have also caused a lot of damage to daily production and life, such as aviation accidents.
In the 1960s, an American plane suddenly hit a flock of starlings during takeoff. These flocks of birds got into the aircraft's engine, causing serious failures in the aircraft.
crashed at that time, and a total of 62 crew members died in the crash. This incident also highlighted the contradiction between the starling and the United States, and resolving these birds has become an important task of the US government.
In order to solve these starlings, the United States has continued to invest a lot of energy and financial resources for a long time, from hunting to poisoning, to deploying natural enemy species, almost every possible effective one has been tried, and the government has also made it clear that it will not protect these birds in any way.
Unfortunately, after so many measures were implemented, the number of starlings did not change significantly, and even if more than 1 million were eliminated every year, it was ineffective.
It is obvious that their reproduction speed is still very fast. According to official estimates, the economic losses caused by starlings in the United States every year are huge, exceeding 800 million US dollars, which almost makes people fear this bird.
Biologically speaking, starlings indeed constitute a species invasion of the United States. Who can imagine that less than a hundred birds at that time have now spread throughout the American continent.
In the final analysis, a small action by the trainer brought irreversible disasters to his country more than a hundred years later. If he had foreseeed such consequences at the beginning, he might not have chosen to let the birds fly.
Conclusion
Therefore, in order to survive better, today's humans must have an in-depth understanding and understanding of species invasion . Not only environmentalists and biologists, but also government workers, we ordinary people must also master the most basic common sense, and at least have awareness in this aspect.
cannot bring foreign species into an ecological environment that originally did not belong to it, because once a species invasion occurs, the consequences may be that we cannot bear. Whether it is economic losses or safety accidents, it will eventually have a very bad impact on people.
