"Canada's Yellow Flower" has repeatedly rushed to the hot search
This one was included many years ago
List of Invasive Alien Species in China (Second Batch)
Ecological killer
Recently, it is suspected of appearing in our city
Xihua Wetland Park
Recently, when Mr. Yin, a citizen, went to Xihua Wetland Park to play, he accidentally found that there were some plants growing in the park, which looked particularly like the exotic species "Canada's Yellow Flower". After that, Mr. Yin went home and checked the relevant information and confirmed that these plants were "a yellow flower in Canada". Mr. Yin is concerned that the continued growth of these alien species will have an impact on the ecological environment.
According to the information provided by Mr. Yin, the reporter came to Xihua Wetland Park and found plants in various areas of the park that Mr. Yin said were suspected of being "a yellow flower in Canada".
Some of them have not grown for a long time, looking very tender green and crisp, some have grown more than 2 meters, and the branches are budding. In an area near the boardwalk in the park, the reporter saw a patch of "Canada's yellow flowers".
Mr. Yin, a citizen: "My friend and I went to see it by chance, and when I saw a branch on the side of the road, because it was going to bloom yellow at that time, if there was no flower, I didn't pay much attention." But just when I saw the shape of the plant, I was a little confused, I felt that it was. Then I looked up about its biological traits, and at this point I was sure it was (a Canadian yellow flower). ”
It is understood that "Canada One Yellow Flower" belongs to the Asteraceae family, a yellow flower is a perennial herb, also known as the yellow warbler, unicorn grass, golden stick grass, the genus has about 125 species worldwide.
The plants are characterized by drought tolerance, hardiness, and prefer sunny and cool dry environments, mainly growing on river banks, wastelands, both sides of roads, farmland and other areas. Every year around October and November, a string of golden yellow flowers blooms, which are particularly vivid against the green leaves.
"Canada's yellow flower" has developed rhizomes, strong fecundity, broad ecological adaptability, and will compete with the surrounding plants for fertilizer and glory, posing a serious threat to biodiversity.
Researchers used to study the roots of a Canadian yellow flower with invasion potential. Image credit: Wiley/Museum
Citizen Mr. Yin: "This thing is too vicious." First of all, it preempts the ecological preemptively, this thing can grow from the ground to more than 2 meters, basically can cover the annual herb. And its root system is somewhat similar to bamboo, because it is something like a fern root in the Asteraceae family, which is intertwined and its roots cannot be removed. You cut down the surface of the plant, but the next year it still grows. Even in that year, it grows out immediately, secreting toxins where it grows, inhibiting the growth of other plants. ”
Subsequently, the reporter found the staff of the park management to understand the situation.
Park management staff: "Last year, we found it the year before, and after we found it, our company mobilized us to cut it." At the beginning it was cut, and after the cut did not work, it came to spray medicine, and now it is less, more before. ”
Subsequently, the reporter contacted the community-level lake chief, who said that he had previously cooperated with the park management to clean up, but due to the strong reproductive ability and developed root system of "Canada's yellow flower", there was a certain degree of difficulty in cleaning. For the situation reported by the public, they will go to the scene as soon as possible to verify and deal with it.
A little more news
In recent years, the number of invasive alien species on the mainland has shown an upward trend, becoming one of the countries in the world that suffer the most from the invasion of alien species. According to the 2020 Bulletin on the State of China's Ecology and Environment, more than 660 invasive alien species have been found on the mainland. Among them, 71 species have caused or have potential threats to natural ecosystems and have been included in the List of Invasive Alien Species in China, and 219 species have been invaded into national nature reserves.
Some invasive alien species are harmful because they reproduce rapidly and grow exponentially. And due to the lack of natural enemy constraints, it often grows into a new dominant local species, which seriously damages local biodiversity and ecological security, and will also cause serious biological pollution and irreversible damage to the ecosystem.
8099999 reporter reports