I believe that everyone has seen relevant reports, because of the invasion of species in recent years, it has caused some ecological damage and caused a certain impact on the natural resources of some areas.
Ecological balance has also been a hot topic all along! Ecological balance refers to the state of high adaptation, coordination and unity between organisms and the environment in the ecosystem and between various populations of organisms through energy flow, material circulation and information transmission. Biological chains need to be balanced, and once broken, the consequences will be unimaginable.
In nature, whether it is forests, grasslands, lakes, it is composed of animals, plants, microorganisms and other biological components and non-biological components such as light, water, soil, air, and temperature. Ecological balance is the fundamental condition for organisms to maintain normal growth and development, reproduction and reproduction, and it is also the basic condition for human survival. The destruction of the ecological balance will bring all kinds of organisms to the brink of extinction.
In recent years, we have often seen customs seizures of alien species being carried by various kinds in an attempt to fool through customs! They will use the package as a cover to "manipulate" the name of the entry declaration, and mostly use "gifts", clothing, "toy models", "plastic dolls", "thermos cups", "aquarium products", etc., but no matter what, it is difficult to escape the eyes of customs inspectors!
For example, 50 live "giant ants" were seized in Guangzhou, 19 live fire salamanders with strong reproductive ability were seized in Beijing, 3 live "Hercules beetle" rhinoceros turtles smuggled from Japan were intercepted by Jiangmen Customs, 38 strongly toxic live ants were seized by Qingdao Customs, and exotic organisms such as bell horn frogs, African spotted locusts, Spanish sage and white sage were also intercepted for the first time.
<h1 class="pgc-h-arrow-right" data-track="34" more than 7,000 black-bellied fruit flies were intercepted > Qingdao Customs</h1>
On May 24, 2021, when Qingdao Customs was inspecting a parcel from the United States, it was X-rayed and found that there was an abnormality in the package, and then transferred to the manual channel for inspection.
The package is declared is the clothes, the customs officer can smell a special smell after opening the package, but the clothes inside are only disguised, mainly to cover up the 66 finger tubes inside. After examination by specialized personnel, the 66 finger tubes contained eggs, larvae, pupae and adult worms of fruit flies.
There are more than 100 in each finger tube, some in the incubation stage, some in feathering, and the total number exceeds 7,000. In accordance with the relevant legal procedures, this package was treated harmlessly!
<h1 class="pgc-h-arrow-right" data-track="33" >What is Drosophila nigra? </h1>
Fruit flies are small flies with a body length of between 1.5 and 4 mm. The insect body is mostly yellow-brown, and some are black. The head has a pair of large, mostly bright red compound eyes, three pairs of rim bristles on the inside of the two compound eyes, and a slight bulge in the center of the posterior head between the compound eyes, forming a single eye triangle area, and a pair of monocular bristles are born in front of and below the three single eyes.
Drosophila melanogaster is a species of fly native to the tropics or subtropics. It is found all over the world like humans and spends the winter in human quarters. In terms of genetic, developmental, physiological and behavioral research, Fruit flies are one of the most common research subjects. The reason is that it is easy to cultivate, reproduce quickly, and is economical to use: it can reproduce a generation in ten days at room temperature; and it has only four pairs of chromosomes, which is easy to manipulate genetically; and it has many mutants to take advantage of.
The primary food source for Drosophila melanogaster larvae is the microorganisms that make the fruit decay, such as yeast and bacteria, followed by fruits with sugary content. The growth and development of Drosophila melanogaster is greatly affected by temperature; At the same time, the initial and peak periods of fruit flies in the orchard should be determined according to the time of cherry ripening. Due to the influence of climate, environment and other factors, the time of occurrence of each year has a certain difference.
Female flies can lay 400 0.5 mm eggs at a time, which are coated with chorionic membrane and a layer of yolk membrane. The rate of development is affected by ambient temperature. At 25°C, the larvae will burst out of their shells after 22 hours. Too high or too low a temperature can affect the rate of development. Adult female flies usually lay eggs on rotten fruit or other fermented organic matter.
<h1 class="pgc-h-arrow-right" data-track="32" > the harm of the entry of Drosophila nigricans? </h1>
In the lab, scientists have spawned countless mutants in fruit flies. Through systematic screening, scientists usually select about 13,400 genes in their genomes for induction, causing fruit flies to mutate. The process is usually hybridized with homozygotes with a distinct phenotype, and the next generation of F1 and F2 has been obtained, which can be studied. Common variations are eye color, wing shape, body color, head shape, and so on. It will not only bring immeasurable losses to China's agriculture, especially the planting and storage of melons, fruits, vegetables, etc.; it will also cause immeasurable damage to other species of the same ecological niche in the local area, and may also spread various bacteria and viruses.
In addition, another threat to Drosophila melanogaster may come from genetic mutations. Because the black-bellied fruit fly has less genetic material, scientists can easily genetically manipulate it, and once this batch of black-bellied fruit flies from unknown sources is modified by people with ulterior motives to make it have a bite population, secrete toxins or have greater destructive power on fruits and vegetables, it is bound to bring a fatal blow to the invading land and pose a great threat to the safety of people's lives, health and property safety.
<h1 class="pgc-h-arrow-right" data-track="29" alien species > have posed a serious hazard to China's ecological security</h1>
An alien species is a taxonomy of species, subspecies or below that appear outside of their past or present natural range and potential for dispersion (i.e., cannot be distributed without direct, indirect introduction or human care), including parts, gametes or breeding bodies where they are likely to survive and reproduce.
The "alien" of alien species is defined by the ecosystem, such as crocodile turtles, scavenger fish, tilapia, Fushou snails, crocodile eels, etc., which will destroy the local ecological balance.
Finally, everyone has the responsibility to protect the environment, and for the ecological security of the country, it is recommended that you buy pets through formal channels, and do not buy species smuggled abroad.