What are the current invasive alien species in China since 2008? How many types are there?

There are eel finch, eel, turtle, crayfish, poplar and ......

The number of invasive alien species in China is on the rise, and the hazards of invasive alien species are as follows.

In recent years, the invasion of alien species has been increasing and has become the biggest threat in the world. According to the 2020 Communiqué on the State of China's Ecology and Environment, there are currently more than 660 invasive alien species in China. Among them, 71 species have posed significant threats, and 219 species have entered national nature reserves.

The harm of these alien species mainly lies in their rapid reproduction, multiplying their numbers, and due to the lack of natural enemies, they often become new dominant species in the local area, which poses a great threat to local biodiversity and ecological security, and will also cause irreparable damage to the ecological environment.

Water hyacinth has the effect of purifying water quality, but due to the higher density of water hyacinth, it will reduce the exchange of water and air, resulting in a decrease in the dissolved oxygen content in the water, which will lead to the death of organisms in the water.

In addition, because water hyacinth is rich in heavy metal elements, if it is not timely, its heavy metals will be released, which will cause certain pollution to the water body. Heavy metals are not easy to dissolve in water, and it is difficult for the human body to be excreted after drinking this water.

In addition, the fecundity of water hyacinth is very strong, if not treated in time, once the growth rate of water hyacinth accelerates, it will not only affect the flow of river water, but also cause pollution of river water.

Goldenrod canadensis is known as "overlord flower" because of its cold and drought tolerance and large number of seeds. In a suitable climate, Goldenrod canadensis has an average of more than 1500 inflorescences, each of which produces 10-15 seeds with a germination rate of 43%.

A Canadian goldenrod can produce more than 20,000 seeds every year, which flutter in the wind and spread easily. Especially when natural plants are destroyed, these organisms can quickly occupy all the ecological space.

Due to the rapid reproduction rate and geometric progression, some invasive alien species are very harmful, and due to the lack of natural enemies, they often grow into new native dominant species, which seriously damages the local biodiversity and ecological security, and also causes serious biological pollution and irreversible damage to the ecosystem.

Alien species will lead to complete destruction of the native ecological environment, and alien species have no natural enemies, which will lead to the encroachment of native organisms and the breakage of biological chains.

It has been found that the alien species with ecological damage should be artificially eliminated, otherwise once they enter our country for breeding, the loss of natural enemies will definitely cause serious damage to the ecological balance of our lives.

How to prevent alien species from entering our country?

If a visitor returning from abroad wants to bring back a species that is not available in China, the materials must be checked and it is clear that the species is not prone to invasion. Do not allow the invasive species to escape, do not let them come into contact with the outside world, and must be completely isolated from the outside world. Increase the scope of inspection of tourists entering the country, and resolutely prevent invasive species from being inadvertently brought or smuggled by alien species.

Many rare animals come from China's neighboring countries, especially Southeast Asia and China. There are also rare animals from nature, from Europe, Africa and the United States to China. Because many of the rare animals in the smuggled goods are exotic species, or often suffer from exotic rare animal diseases.

Random conversion of exotic rare animals collected or purchased by the ** department is likely to lead to the death of some races, while others may lead to biological invasions, seriously endangering local rare animals or ecosystems in China.

As people purposefully or subconsciously bring certain organisms to areas suitable for habitation and reproduction, resulting in the continuous development of their species, the main production areas are gradually and steadily expanding, coordinating the survival of indigenous biological species, and adversely affecting biodiversity, forest fruits, agriculture and animal husbandry, and of course ecological environmental protection and even health.

What are the hazards of alien species?

The key aspects of alien species invasion are: first, reducing agricultural and forestry commodities, annual output value and quality, increasing costs, endangering biodiversity, especially encroaching on the living environment of local species, resulting in the death and endangerment of local species; The third is to endanger the physical and mental health of people and animals.

At least 188 invasive green plants, 81 invasive animals and 19 invasive microorganisms have been found in China, and 50 of the 100 highly threatening external invasive species released by the Global Alliance for Conservation have posed a serious threat to agriculture and animal husbandry, forestry and fruit industry, water conservancy projects and aquaculture.

If an invasive alien species is found, it should be eradicated in time, because this invasive species will seriously endanger the survival of native species and bring serious ecological disasters.

First of all, these alien species should be prohibited from entering China, and if they are found to have entered China, they should be handed over to the police or sent to the Chinese Academy of Sciences.

When encountering this alien species, it should be completely eradicated, otherwise it will affect the development of the surrounding ecological environment and is very dangerous.

It should be dealt with through national policies, as well as related situations, and it is necessary to understand the corresponding measures to solve such situations.

Invasive alien species in China include: African giant snail, Fushou snail, bullfrog, red fire ant, crayfish, Brazilian tortoise, etc.

The List of Invasive Alien Species in China is a list of invasive species that are more harmful in China published by the People's Republic of China. It was released in 4 batches in 2003, 2010, 2014 and 2016, with a total of 71 species.

As of August 2020, the Ministry of Ecology and Environment recently released the 2019 Communiqué on the State of China's Ecology and Environment, showing that more than 660 invasive alien species have been found across the country. It is most severe in the south-west and coastal areas, but there is still a lack of an early warning mechanism. The invasion routes are mainly man-made; Sticking to the tourist's body and bringing it in; Spread naturally.

Alien species that have invaded China include water hyacinth, American white moth, etc.

Source: Ecosystems are formed through long-term evolution, and the species in the system have gone through hundreds of thousands of years of competition, exclusion, adaptation, and mutual benefit, and have formed the close relationship that is now interdependent and mutually restrictive.

When an alien species is introduced, it may be excluded from the system because it cannot adapt to the new environment; It is also possible that because there are no competing or constraining organisms in the new environment, the introduced species may become a real invader, upsetting the balance, changing or destroying the local ecological environment, and seriously damaging biodiversity.

As of June 5, 2020, more than 660 invasive alien species have been discovered in China. Among them, 71 species have caused or have potential threats to natural ecosystems and have been included in the List of Invasive Alien Species in China.

According to relevant data, China is one of the countries most seriously harmed by alien species, according to relevant data, more than 660 kinds of invasive alien species have been found in China, some species not only affect human life, but also cause great pollution and harm to the ecological environment and water environment. At this time, some netizens also asked, how did alien species invade the native area?

According to the invasion of alien species, most of them are invaded through the following two ways:

1. Natural invasion. The world's rivers and air itself belong to the shared state, if the area is close to China, in this case, it is likely that through the flow of air or water and the spread of insects and birds, plant seeds or animal larvae will be migrated, in this case it will also lead to the invasion of alien species.

2. Artificially introduced. Artificial introduction can generally be divided into two types: unintentional and intentional. Unintentional introduction, mainly due to the fact that some people go abroad to play, may carry some larvae or seeds of alien species on their bodies or shoes, and after stepping on the land area without knowing it, it is likely to lead to the invasion of alien species; However, there are two types of intentional introductions, the first is through private channels, and the second is through online platforms.

To put it simply, it is the act of buying and selling.

However, according to relevant data, in fact, China is more seriously infested by alien species, and more cases are caused by a kind of buying and selling. Because most people are in a curious mind, if they see something they have not seen or animals, they will be particularly curious and want to raise, but in the process of breeding, they will not understand the habits and characteristics of this animal, resulting in the final inability to raise, they will be discarded or released at will, resulting in corresponding harm.

Summary. There are two main ways for alien species to invade the territory in China, the first is natural invasion, and the second is artificial introduction. Overall, the probability of anthropogenic introduction is much greater than that of natural invasion.

Some alien species have invaded through land borders, and some have been brought in by tourists who have accidentally brought alien species through customs.

One is natural invasion and the other is man-made, both of which will attract alien species to invade the territory.

It will invade through natural factors, through imported grain and fruits, and through people's private trafficking.