The general content of the biological invaders is known

In order to prevent the invasion of alien species, the first task is to defend, and the risk assessment system of alien species is to strive to resolutely keep out the more harmful organisms in the first area at the first time.

Promote the use of native species. Strengthen research on provenance breeding of local species.

First of all, it is better not to face, that is, to avoid biological invasions:

Improve people's quality, pay attention to and actively prevent the introduction of unknown xenomorphic organisms;

improve various systems, strengthen customs inspections, etc.;

Secondly, study the countermeasures:

Strengthen research and kill the invaded organisms;

Improve the region's ecosystem and strengthen its ability to resist invasion.

At the same time, natural enemy creatures are introduced to fight poison with poison;

Conservation of species in the region, such as the establishment of seed banks, gene banks, etc.

Biological invasion refers to the process in which organisms invade from the original habitat to another new environment through natural or man-made means, causing economic losses or ecological disasters to the biodiversity of the invasion site, agriculture, forestry, animal husbandry and fishery production, and human health.

Natural invasion. This kind of invasion is not caused by human causes, but is caused by biological hazards caused by natural migration of plant seeds or animal larvae, eggs or microorganisms through wind vectors, water flows or by insects and birds.

For example, Eupatorium purple, Mikania and the American spotted diver are all natural factors that have invaded China.

Unintentional introduction. Although this introduction method is artificially introduced, there is no subjective intention to introduce it, but it is accompanied by import and export**, sea vessels or inbound tourism are inadvertently introduced.

For example, "pine wood nematode" was brought in by Chinese merchants with wooden packaging boxes when importing equipment. The release of millions of tons of ballast water from sea vessels sailing in the world's seas has also become a major channel for the unintentional introduction of aquatic organisms. In addition, fruits, vegetables, meat, and even the soles of passengers' shoes carried by inbound passengers may become channels for unintentional invasion of alien organisms.

Intentional introduction. This is the most important channel for the invasion of alien organisms, and countries around the world often consciously introduce excellent animal and plant varieties for the needs of developing agriculture, forestry and fisheries. For example, at the beginning of the 20th century, New Zealand introduced kiwifruit from China, and the United States introduced soybeans from China. However, due to the lack of a comprehensive risk assessment system, countries around the world have introduced a large number of pests while introducing excellent varieties, such as rice grass, water peanut, and Fushou snail.

These invasive species are thriving in the absence of natural predators due to the alteration of the species' living environment and food chain. Most of the world's pests are introduced to countries around the world through this channel. International Cooperation on the Prevention and Control of Alien Species Invasion and Legislative Practice of Other Countries As a global ecological phenomenon, alien species invasion has gradually become an important cause of sacrificial biodiversity loss and species extinction.

According to the data provided by the International Union for the Conservation of Natural Resources, there are currently 10,954 species of wild animals in danger of extinction in the world, 1 3 of the world's fish, 1 4 of mammals, birds, and reptiles are highly endangered, and if this rate develops to 2100, 1 3 to 2 3 plants, animals and other organisms on the earth will disappear, and the large-scale death of these species is similar to the extinction of the dinosaurs 65 million years ago.

With such a grim situation, more and more countries have gradually realized that the power of one country alone cannot stop the wanton invasion of alien species, and active international cooperation can more effectively remove the threat of alien species to biodiversity.

Alien species are brought by people, either intentionally or unintentionally, to places where they have not lived before. Some of them successfully took root and began to grow, while some of them ended up "dying before they got out of school" due to "unadaptation" and other reasons.

"Invasive Alien Species in China".

Pine wood nematode, Wetland pine mealybug, sand sieve shell, four-striped bean elephant, nail snail, Brazilian bean elephant, large bottle snail, pea elephant, brown cloud agate snail.

Broad bean elephant, Valencian slug, Corn beetle, Crayfish, Potato beetle, American cockroach, Rice water weevil, American cockroach, Red fat beetle, American cockroach, American spotted loon, Termite, Cane moth, Pine scalell, Codling moth, Apple cotton aphid.

American white moth, grape phylloxera, longhorned swift ant, big-headed ant, Taihu new whitebait, mouth hatching non-crucian carp, grass carp, wheat ear fish, bighead carp, bullfrog, Ziling's goby, muskrat, mosquito-eating fish, beaver rat.

Grass pepper Bovine eggplant (belladonna) Cold-water flower microphylla False tobacco tree Eggplant Mixed quinoa Wild licorice (Rock sugar grass) Hollow lotus seed grass (water peanut) Ivy Amaranth spinosa Persian Amaranth Paracarpa Amaranth Aceanth Amaranth

Broad-leaved abundant flowers, purple jasmine, spiny bracts, weeping Shanglu (American Shanglu), Shenghong thistle (Huoxiang thistle), heart-leaved sunflower potato.

Ragweed, Wheat Immortal, Diamond-shaped Aster, Water Shield Grass, Trifolium Needleweed.

Stinky camelina fluffy grass.

North American solitary cuisine.

Thornless mimosa.

Acacia Sumatra liquor grass.

Acacia chrysanthemum (revolutionary vegetable).

Mimosa one-year-old canopy.

Vitex pea, purple stem, Zealand.

Safflower sorrel.

False stinky grass wild stork grass.

Aircraft grass tooth cracked euphorbia.

Hyssop (spicy grass).

Flyweed, Michamomile.

Spotted brocade silver gum chrysanthemum.

Grate hemp European Senecio.

Wild watermelon seedlings. Canadian "Goldenrod".

Cypress Gymnasium.

Snake woman golden-waisted arrow.

Dragon Ball Fruit Feather Mangomile.

Pear fruit cactus.

Trifid chrysanthemum.

Single-pricked cactus.

Wild oats.

Cactus carpet grass.

Celery, tribulus terrestris, wild carrots.

Poison wheat stinging celery. The five-clawed golden dragon of the big millet.

Ground millet round-leaved morning glory.

Lantana two-eared grass.

False sorghum, false verbena.

Spartina alterniflora. Hanging ball grass red hairy grass.

Mountain incense (mountain mint).

Vetiver mandala.

Large-scale carcy, eggplant, and water hyacinth.

Origin of Goldenrod: Canada harms native species.