With the increasing frequency and close economic and cultural exchanges between countries and regions, and with the increasing number of global environmental instability factors, the occurrence of invasions of alien species has also gradually increased. The ecological disasters caused by them are seriously threatening the economic development of countries around the world and the global ecological security. Up to now, more than 660 alien species have invaded our country's . Today we will take a look at the five most harmful alien species
African large snail
This snail is native to the eastern part of Africa and is a medium-sized snail. They like to survive in a humid environment, have a wide range of food, and can harm hundreds of crops. They can lay 30 to 700 eggs at a time, and they have particularly strong reproductive ability and extremely fast speed. They are also the intermediate hosts of many human and animal parasites and pathogens, especially the transmission of tuberculosis and eosinophilic meningitis . It is extremely harmful to eat and may even be infected when touched. This is by no means an alarmist. There have been examples of serious consequences caused by touching this snail in our country.
crocodile gar
crocodile gar is a real large and fierce fish . It has more than 500 teeth all over the mouth, which can easily cut the skin of its prey. It is the largest of the seven species of gars in North America. It is huge in size, and the body length of alligator gar can grow up to 3 meters after adulthood. This strange fish is native to southern North America and has a very ferocious temperament. They can eat almost most of the creatures in the entire living area and have no natural enemies. It is also very dangerous for humans to encounter it. Once placed in natural waters, it will cause serious damage to the local water ecosystem. It can be described as "as long as it is a living creature in the water, it will eat almost all." Alligator gar has appeared many times in our country.
Brazilian Turtle
Brazilian Turtle's name is familiar because it is a very popular pet and is kept by many families. This turtle is native to the region of North America. They are the most widely raised reptile in the world. Because many families are kept as pets, in recent years, some of the breeding families have frequently experienced abandonment, release animals or raising and escaping. This is not a small matter. This will lead to an increasing number of Brazilian turtles around the world, especially in our country, which has seriously affected the living environment of local turtles in my country. Not only that, they are also the culprit for the spread of Salmonella. According to statistics, about millions of people in the United States are infected with this bacteria every year, which is very harmful to humans.
Fushou Snail
Fushou Snail is now famous on the Internet. They are native to the tropical and subtropical areas of Central America. They were introduced to Guangdong, my country in the 1980s by Brazil for artificial breeding. Later, for some reasons, the Fushou snails quickly spread and reproduce in large quantities in the wild. Since the local field snail can no longer satisfy the appetite of foodies, the target is to the larger Fushou snail, but an undercooked Fushou snail contains more than 6,000 parasites, which are very harmful to the human body. Fortunately, the Internet is now popular, and the hazards and identification methods of Fushou snails are now easily found online. Therefore, we must distinguish the differences between the field snails and Fushou snails to avoid unnecessary harm.
Scavenger
This fish is native to South America and was introduced to China as an ornamental fish in 1980. However, due to various reasons, Scavengers breed in large quantities in the wild and dominate the water. Not only can they survive in extremely harsh environments, but they also have a particularly strong tolerance to water with higher pH and alkalinity. They can even survive when they are dried and encounter water. They are considered abnormal. Since the scavenger is an external skeleton fish, 80% of the body is bones and is particularly hard, there are almost no natural enemies in the survival place, and even the brave and warlike foodies are powerless to see him.
