Biological invasion and its hazards handwritten report content

The contents of the handwritten report on biological invasions and their hazards can start from two points, namely the definition and types of biological invasions and the hazards of biological invasions.

1. Definition and types of biological invasion:

Explain what biological invasion is, which means that non-native organisms enter a new ecosystem through natural or artificial means and gradually The process of establishing populations in the system and affecting the original biodiversity. Common types of biological invasions include unintentional introduction, intentional introduction and natural invasion.

Unintentional introduction is usually due to human activities inadvertently introducing alien species into new ecosystems, such as shellfish or plant seeds on ships; intentional introduction is when humans intentionally introduce alien species into new ecosystems , such as natural enemies introduced to control pests; natural invasion is the introduction of foreign organisms into new ecosystems through natural channels, such as the migration of birds.

2. The harm of biological invasion:

Biological invasion will have a negative impact on the ecosystem, economy and human health. In terms of ecosystems, alien species may disrupt the original ecological balance, leading to the extinction of native species, decline in biodiversity, and weakening of ecosystem stability.

In terms of economy, biological invasion may cause huge losses to agriculture, forestry, fishery and other industries. For example, Acanthopanax has become a serious invasive alien plant in some southern provinces of China, posing a serious threat to rice cultivation. In terms of human health, some alien species may spread diseases and affect human health and life safety.

Prevention and Control of Biological Invasion

1. Preventive measures:

Prevention is the first line of defense against biological invasion. This includes strengthening customs and border inspections and conducting strict screening and testing of foreign organisms to prevent them from entering the country through trade, tourism and other channels.

2. Early detection and monitoring:

For alien organisms that have invaded, early detection and monitoring have become particularly important. Establish an effective monitoring system to regularly investigate and monitor alien organisms, promptly detect and assess invasion risks, and provide scientific basis for subsequent governance and control.

3. Control and governance:

Control and governance are essential for alien organisms that have caused harm. This can be achieved through physical, chemical and biological methods. For example, artificial or mechanical means are used to directly remove or eliminate the population of alien organisms; chemical pesticides are used to control the number of alien organisms; natural enemies or competing species are introduced to restrict the reproduction and spread of alien organisms, etc.