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Anonymous users2024-02-11Shangyu belongs to Anhui Province, right?
As far as I know, the alien plants in the middle and lower reaches of the Yangtze River in Weihai are: ragweed, water hyacinth, water peanut, Canadian goldenrod, etc.; Animals include: Italian bee, German cockroach, American white moth, etc.
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Anonymous users2024-02-10Is Shangyu good for Zhejiang?
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Anonymous users2024-02-09Cherish life, stay away from Gaibei...
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Anonymous users2024-02-08Biological invaders are those who originally lived in a foreign land and migrated to a new ecological environment through unnatural means. These invasive species are thriving in the absence of natural predators due to the alteration of the species' living environment and food chain.
Economic losses: agricultural losses caused by new pests and diseases, and indirect economic losses caused by a series of adverse effects of alien species on water, soil, climate, etc., brought about by changing ecosystems.
Health threats: Causing new diseases in humans, the pathogens of infectious diseases of alien species have types that are not common in the local area, and the native species may lack immunity to the new pathogens, which will have adverse effects on the population.
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Anonymous users2024-02-07Because they moved from one place to another place where they were not originally there, they were called immigrants, and they caused a certain amount of harm to this place, so they were invaders.
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Anonymous users2024-02-06There is a risk of destroying the original ecosystem and disrupting the inherent balance. Of course, the new arrivals are considered invaders, and after a period of time, a new balance is established, and then new species migrate, and they are counted as new invaders.
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Anonymous users2024-02-05Because they affect the survival of other species.
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Anonymous users2024-02-04Disagree.
When the organisms in place B invade to place A, it will quickly destroy the local ecological balance, and if you want to re-equilibrium the ecology through natural selection (i.e., the way of laissez-faire), it will inevitably change the species community in place A and cause an ecological disaster.
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Anonymous users2024-02-03It takes hundreds or even tens of thousands of years for a new ecological balance to form, and there will be many unpredictable changes in the process, which can be formed by simple natural selection. Therefore, natural selection can restrain the harm of biological invaders, and it is one-sided to achieve a new ecological balance.
According to incomplete statistics, there are 107 species of major alien weeds, 32 species of alien pests and 23 species of alien pathogens in ...... ChinaThe first list of invasive alien species was announced: >>>More
There are many relevant laws and related institutions related to the control of alien species in China, and these laws, regulations and organizational systems mainly focus on human health, pests and diseases and weed quarantine, and do not fully contain the relevant content of invasive species to biodiversity or ecological environment damage, and the goal of controlling alien species from the perspective of biodiversity conservation is still far away. At the same time, China has a vast territory and complex ecosystem types, and the transfer of species across regions in China has not received sufficient attention so far, and there are no rules and regulations to follow to manage the problem of regional species invasion. In fact, although China has taken some control measures for the introduction of the problem, it is far from establishing a complete set of invasive alien species control system, and has not paid sufficient attention to the early development, monitoring, early control and rapid response of invasive alien species. >>>More
According to a report by Guangming** (June 12, 2000), a "plant killer" Mikania produced in Central and South America is spreading rapidly on Neilingding Island in the southwest sea of Shenzhen. They are like a huge net, black and oppressive on the beautiful lychee trees, banana trees, and acacia trees. Trees are dying silently because they can't get sunlight, flowers and green grass are withering because they can't breathe fresh air, and the land on the island is turning into a wasteland. >>>More
In order to prevent the invasion of alien species, the first task is to defend, and the risk assessment system of alien species is to strive to resolutely keep out the more harmful organisms in the first area at the first time.
Illustrative methods are used: list numbers, give examples, make analogies, etc. >>>More