Biological invaders related connections, what is biological invasion

With the convenience of human transportation, more and more foreign animals have entered our country. If we don't pay attention to it, it will affect our ecological environment and cause widespread concern. Jinling Customs, which is part of Nanjing Customs, inspected the letter and found six plastic bottles in one mail, containing live beetles, wet wood chips and nutrients.

Six Japanese beetles were identified, four female and two male. There are plastic bottles with wet wood chips and nutrients. Each bottle contained a live beetle.

This swarm of Japanese giant spade beetles is slightly larger than the regular beetle. They are very strong and about 8 cm long. They may have been carefully selected before being mailed.

If the Japanese spade beetle enters the wild of our country and becomes an invasion target, it will bring damage to the local ecological environment and disrupt the food chain. Beetles are mainly found in Japan. It's big and aggressive.

Customs warns that as an alien species, live insects may cause biological invasions. It is forbidden to bring or mail into the country. It is a nocturnal insect that inhabits succulent trees in broadleaf forests.

Species invasion, also known as biological invasion, refers to the invasion of organisms from their original habitat into another new environment, either naturally or artificially through chain pins. Processes that cause damage to biodiversity, agriculture, forestry, animal husbandry and fisheries, production and human health. The invasion of alien species has a certain impact on regional economic development, ecological environment, and even human health and social activities.

Beetles eat the juice of adults, honey, rotting food of larvae, leaves and sap of plants, and love sweets.

Try to feed some foods high in sugar, which is very aggressive. Most adults are nocturnal and phototaxis, but there are also daytime species. The invasion of alien species has a certain impact on regional economic development, ecological environment, and even human health and social activities.

Some alien species have invaded farmland and pastures, causing reduced yields and economic losses to crops, forests and pastures. Potato beetles can cause a 30-60% reduction in potato yields, or even no harvest. In addition, quarantine, prevention and ** will also come at a huge cost.

Biological invasion is a very troublesome thing, if the main Lu Zhu Yuhu said that some foreign organisms, our country does not have him through various ways, such as smuggling illegal carrying, etc., into the territory of our country, which will seriously affect the ecosystem of our country.

Categories: Education Science.

Analysis: "Biological invasion" refers to the phenomenon that a certain organism is naturally introduced from other places or artificially introduced into the wild state and causes certain harm to the local ecosystem. Alien organisms have a number of limiting factors in their places of origin that prevent the vicious expansion of their populations, among which predators and parasitic predators play a key role in keeping their population densities below a certain number.

As a result, those alien species usually do not pose a significant hazard in their place of origin. However, once they invade new areas and lose the control of their predators, their population densities can grow rapidly and spread rapidly. In nature, there is a food chain in the ecological environment, and natural enemies restrain each other, and once a certain organism is artificially extinct and artificially introduced, it will produce a series of unimaginable consequences.

Therefore, some foreign scholars regard blind introduction, habitat shrinkage and fragmentation, overkilling, and the secondary effect of species extinction as the four major causes of species extinction, and visually call it the "devil's quartet".

There are two types of biological invasions: intentional and unintentional. With the introduction of species, these immigrants may benefit human beings on the one hand, and on the other hand, they may also have a certain impact on the local ecological environment and even economic development.

How to solve the problem of "biological invasion", the "illegal immigration" of the biological world, so that they do not pose a danger in a foreign land? The experts are: first, we should introduce species cautiously and strengthen the management of the introduced species; Second, it is necessary to find out the types and harmful status of existing alien harmful species in China; Third, it is necessary to strengthen the prevention and control of major alien harmful species and the comprehensive management of them.

The International Union for Conservation of Nature (IUCN), adopted in Switzerland in February 2000, states that "for thousands of years, oceans, mountains, rivers and deserts have provided isolated natural barriers to the evolution of rare species and ecosystems. In recent centuries, these barriers have become ineffective due to global change, and invasive alien species have traveled across oceans to reach new habitats and habitats, and have become invasive alien species. ”

Biological invasion refers to the phenomenon that a certain organism is naturally introduced from other places or artificially introduced into the wild state and causes certain harm to the local ecosystem. These organisms are called alien species. Alien species are those species, subspecies or below taxa that occur outside their past or present natural ranges and dispersal potential, including all parts of them that are likely to survive and reproduce, gametes or propagules.

Invasive alien species have the characteristics of strong ecological adaptability, strong reproductive ability and strong transmission ability. Invaded ecosystems are characterized by sufficient available resources, lack of natural control mechanisms, and high frequency of human entry. The invasion of alien species literally increases the biodiversity of an area. In fact, those harmless creatures in history have also expanded their distribution through human efforts, and some domesticated crops or animals have become friends of humans.