Over 91 alien invasive species have been found in Jiangsu Province

Since December 2001, under the organization and coordination of the Nanjing Institute of Environmental Sciences of the State Environmental Protection Administration, the first survey on alien invasive species in China's history has been conducted throughout the country. It is reported that there are 91 species of invasive species in Jiangsu, of which plants account for the majority.

National: Many American invasive species

The reporter learned that at the time, the investigation identified a total of 283 invasive alien species, including 19 species of microorganisms, 18 species of aquatic plants, 170 species of terrestrial plants, 25 species of aquatic invertebrates, 33 species of terrestrial invertebrates, and 3 species of amphibians and reptiles. There are 10 species of fish, 5 species of mammals, and more than half of them are terrestrial plants, followed by terrestrial invertebrates, aquatic invertebrates and microorganisms. Invasive aquatic plants are the fifth largest.

It is worth noting that among the invasive alien species, America has 178 sources of origin, accounting for 55.1% of the total frequency (the total frequency of origin is 323); other sources are: Europe (70), Asia (32) ), Africa (26 times), Oceania (2 times). This shows that species in the Americas are better able to adapt to China's habitat, and that species from the Americas have become potential invasive alien species in China.

Of the 76 alien invasive animals, 19 were intentionally introduced, accounting for 25% of the total number of invasive alien species in China; 58 species were unintentionally introduced, accounting for 76.3% of the total number of invasive alien species in China; 1 species.

For example, the seeds of some plants move downwind or fall with the river to another place, or they are eaten by birds and taken to another place. For instance, aircraft grass and Mikania micrantha invade our country by natural factors. In animals, only one mole is introduced through its own spread or through natural forces such as rivers and winds.

Jiangsu: Plant "Aggression" Serious

The reporter learned from the “Regional Distribution of China's Major Invasive Alien Species” that 91 invasive alien species have been discovered in Jiangsu. Among them, the "aggressive" behavior of plants is serious. Experts told reporters that, in particular, among the 16 serious alien invasive plant species announced by the State Environmental Protection Administration, Eupatorium adenophorum, Mikania micrantha, Alternanthera philoxeroides, ragweed, poisonous wheat, Spartina alterniflora, aircraft grass, water hyacinth, etc. Ten kinds of them have all been ambushed in Jiangsu. The invading animals such as water rat, fruit fly and raccoon are also distributed in the wild.

According to experts, in more than 280 alien invasive species in the country, apple aphid and chrysanthemum leaf were discovered as "latent" as early as in Nanjing, and then began to "expand" on a large scale to other cities. Taking Chrysanthemum leaf nematode as an example, the reporter learned that the origin of this nematode was Europe. In the 1970s, it came to China with imported cut chrysanthemum seedlings. Then, Hefei, Anhui, Guangzhou, Guangdong, Zhejiang, Hangzhou, Guizhou (Guiyang, Zunyi) and Changsha, Hunan had all discovered.

The pine wood nematode mainly infects pine plants, causing the pine trees to wither and die, which is a devastating disease of pine trees. China first discovered the pine wood nematode in Nanjing's Sun Yat-sen Mausoleum Scenic Area in 1982. It was introduced by the pine wood nematode propagation media, which was carried in the optical instrument packaging box imported from Japan by the Nanjing Zijinshan Observatory.

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