The introduction of alien species is a concept closely linked to biological invasion. Any biological species is always formed at a specific location and then gradually adapted to the natural habitat of the displaced or introduced land through migration or introduction.
Gradually expand the scope of its existence, which is called the introduction of alien species (referred to as introduction).
Proper introduction will increase the diversity of the organisms in the introduced area and will greatly enrich people's material life. On the contrary, inappropriate introduction can cause alien species lacking natural enemies to rapidly multiply and rob other living organisms, leading to ecological imbalances and the reduction and extinction of other native species, seriously endangering a country's ecological security.
With the changes of climatic environment and other factors, some species that are not harmful after a period of introduction may gradually become "invasive species". Therefore, in a sense, the results of introduction of exotic species have A certain degree of unpredictability. This also makes the prevention and control of alien species invasion more complicated and difficult.
Overall, the channels for biological invasion include the following three:
Natural invasion This kind of invasion is not caused by human factors. It is caused by the natural migration of plant seeds or animal larvae, eggs or microorganisms through the transmission of wind media, water bodies or by insects and birds. Invasion of species.
Unintentionally introducing this kind of introduction method is artificially introduced, but there is no intention to introduce it subjectively, but it is inadvertently introduced along with import and export trade, sea-going or inbound tourism.
Intentional introduction should be said that this is the most important channel for the invasion of alien organisms. Countries in the world are often conscious of the introduction of excellent animal and plant varieties for the development of agriculture, forestry and fisheries. Most of the world's pests are introduced to countries around the world through this channel. Alien invasive species have become an important cause of current ecological degradation and loss of biodiversity.
The invasion of alien species has become a global problem. The invasion of alien species destroys a country's biodiversity, changes its population structure, threatens ecological security, and ultimately affects the global ecological environment and economic development. Therefore, in response to the invasion of alien species, the protection of biodiversity is an important part of protecting ecological security. At present, China has shortcomings in preventing the invasion of alien species and protecting biodiversity, which will inevitably lead to threats to China's ecological security. Therefore, perfecting the legal system of biosafety in China is extremely important for the protection of biodiversity and ecological security in China.
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