[Explanation] Recently, the news of the capture of crocodile gar in Ruzhou, Henan has attracted attention.
This has caused many people's concerns and fears about alien species.
In this regard, Ru Guangxin, a professor at Henan Agricultural University, differentiated and analyzed "alien species" and "invasion of alien species" in an interview.
[Concurrent] Ru Guangxin, a professor at Henan Agricultural University
We should look at it (the alien species) in two.
If these species go to some new places, it can bring some positive impact on our life and on our (economic) environment, of course, we still welcome it.
So we can't change color just by talking about alien species, this is unnecessary.
[Explanation] In recent years, with China's economic development and increasingly close social interactions, some plants, insects, aquatic organisms, etc. from abroad are more likely to enter our country through artificial means, so how to determine whether these alien species are "invasive" Woolen cloth?
[Concurrent] Ru Guangxin, a professor at Henan Agricultural University
Usually we can think that after this species goes to a new place, it can quickly occupy a new living environment.
After the occupation, whether it has an impact on some local (native) tree species, species or aquatic organisms, and whether it has changed the original living habits of other local plants, animals or aquatic organisms due to its existence.
If these things (situations) happen, then we think it will have a relatively large impact on the local environment (it may become an invasive species).
[Explanation] It is understood that the alligator gar is a special freshwater giant carnivorous fish in southern North America, with a ferocious nature.
After entering the natural waters of China, they will prey on a large number of fish, causing large-scale flooding of algae and destroying the ecological balance.
As for the determination of invasive alien species like crocodile gar, Ru Guangxin said that in the early stage, experts need to monitor, screen and screen the development and habitat process of alien species. If the species has a negative impact on the local ecological environment, or has a negative impact on the In the future, agricultural production will have a relatively large impact, and it is necessary to give early warnings in a timely manner to guide prevention, control, and pest control.
[Concurrent] Ru Guangxin, a professor at Henan Agricultural University
Our country has strict regulations on the introduction of alien species.
On August 1 this year, we (the country) just promulgated the management measures for the introduction of alien species (invasive alien species).
Among them, there are clear regulations on which alien species can be introduced and which cannot be introduced, and how to manage them after introduction.
Especially for some new exotic species that were not originally in our country, after the introduction, we need to strictly regulate them in the future, and we cannot carry out (introduce) breeding or release (discard) at will.
(For) alien species, how much impact will be brought to our normal life, there is no need to (over-interpret) to understand this matter.
It should be said that it is enough to (objectively) be cautious and correctly understand this issue.
Reporter Li Chaoqing Chenghang reports from Henan
Responsible editor: [Li Ji]