What are the foreign invasive species in Chongqing? How to prevent control? Listening to experts, if you say!
Xinhuanet Chongqing December 10 (Chen Yu) recently "Canadian Yellow Huanghua" hot search, foreign invasive species triggered extensive attention. What is foreign invasion species, how are they invading, where are they outside invasion species, what hazards do they have, how to prevent control? Xinhuanet interviewed Chen Guifang, director of the Forest Protection Research Institute of Chongqing Forestry Research Institute, and came to listen to the experts. Chen Guifang introduced that foreign invasive species refers to the introduction of natural, semi-natural ecosystems or habitats outside the natural distribution area by intentional or unintentional human activities, and establish populations in natural, semi-natural ecosystems or habitats in the natural distribution area, and cause biodiversity introduced Threats, destroy species diversity and organisms of the ecosystem. China’s vast, crossing nearly 50 latles, 5 climate belts According to data released by the Ministry of Ecological Environment, China has found more than 660 invasive species. "According to the survey, the current harmful plants in Chongqing mainly have a purple stem, a hollow lotus grass, a phoenix lotus, a safflower sorghum, and a yellow flower in Canada, Ma Yingdan." Chen Guifang said.
How come foreign invasion species? Chen Guifang believes that the main intrudes include unintentional introduction, human introduction and nature spread.
Inadvertent introduction, mainly includes bringing (such as carava), with the international trade of agricultural products (such as fake sorghum with imported food entry), followed by the initial plant introduction (such as poisonous wheat with imported seeds to China ), Etc .; artificial introduction mainly includes the tail scarratures introduced by vegetables, as a Canadian yellow flower, Brazilian turtle introduced by the medicinal plant, as a medicinal plant introduced, as a bonus, bullfrog, etc .; natural dissemination It means natural spread through self-propagation diffusion and wind, water flow, animal, etc.
"External invasion species will cause economic losses, including direct economic losses including the harm to agriculture, forestry production, such as rice water icon, cava, poisonous wheat, fake sorghum invading farmland, causing production of crops, decreased product quality In addition, foreign invasion species may also destroy the local ecosystem, causing the mourning or extinction of the local species, and ultimately leading to the degradation of the ecosystem, the loss of ecosystem functions, such as the invasion of the Ecological system invaded to Guangdong, the island, causing the island. The system is on the verge of collapse. Foreign invasive species may also affect human health, and some plants are one of the main pathogens of human metamorphosis.
"Chen Guifang said. Although there are many invading species, there are still some species that are welcomed by" food ". The most representative is crayfish. Every year, there are a lot of crayfish in my country, which is consumed on the table, which makes some netizens think Enter the invasion creature by "Eating".
So, the prevention and control of foreign invasive species can be solved by "eat goods"? In this regard, Chen Guifang said, can’t! "The prevention and control of foreign species is a systematic engineering, involving environmental, health, animal and plant quarantine, ocean, grassland, agriculture, forestry and other departments, can not superstitious foreign invasive species can rely on ‘eat.
Only multi-pronged, all-round ‘enclosing’ can make these foreign invasive species pinged. Chen Guifang said.