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More than 660 alien invasive species have been discovered in China. What are the hazards of species invasion?
As we all know, China has a vast territory, rich resources and various species. On the vast land, the number of various species is amazing. And most of them are native to China? Aboriginal people? Only some creatures were introduced from other countries or regions. In recent years, with the more and more serious ecological damage, the risks and challenges of human survival are also increasing. At present, there are many factors that affect ecological security, among which the invasion of alien species is an important factor that is easily overlooked.

0 1. Exotic species affect biodiversity. In the process of historical changes, the natural isolation conditions formed by physical geography make species only live in their familiar areas. After long-term adaptation, these species have become an important part of the local ecosystem, while the ecology in other areas has maintained a dynamic balance. However, when human forces forcibly intervene in this normal ecological circle and bring some species to another ecological environment, in order to seize the survival site, the excluded native species will be severely hit, and some even face extinction.

If the reproductive ability of alien species is much stronger than that of native species, then the monotonicity of species will be formed under continuous reproduction, and after the formation of population advantage, local species will not be able to compete with alien species, thus being suppressed and excluded. In the end, the biodiversity here is completely destroyed, and some local species may even face the risk of extinction if they lose their habitat.

02, leading to frequent natural disasters. For those species that have certain hazards, once these species invade a certain place, it will have a great impact on some local natural resources without natural enemies. For example, species such as African snails and pine wood nematodes were flooded, which had an uncontrollable impact on water areas and forest resources. At that time, it not only destroyed the natural resources of the country, but also caused serious losses to the agriculture, forestry and economy of local residents. According to the data, the economic loss caused by Bursaphelenchus xylophilus is as high as 25 billion RMB per year.

03, affecting human health and animal life, the invasion of alien species will not only have a certain impact on the ecology of animals, but if the strange viruses carried by these alien species spread to humans through various channels, under the fragile resistance of human beings to alien species, it will inevitably lead to a wide range of infections and outbreaks.

In addition, due to the long-term development of human beings, there is a phenomenon of virus isolation between human beings and wild animals, so for those wild animals, some viruses common in the human world belong to exotic species. When humans invade the territory of wild animals, they will not only face the risk of infectious diseases brought by the latter, but also bring diseases and viruses common in the human world to the latter.

Although netizens always tease us that we can bring exotic species? Eat extinction? But in fact, except for crayfish and other special cases, most exotic species have considerable risks. Only by treating these exotic species correctly and curbing their crazy growth can we ensure the ecological security in the natural environment.