外来植物种的入侵危害及预防对策

外来植物种通过一定的传播途径从其原产地传入本地,并能在本地自然状态下定居、繁殖和扩展,对本地生态系统产生一定的影响和危害.外来种入侵已成为当今世界最为棘手的生态环境难题,它不仅危害入侵地区生态系统的结构和功能,同时也是生物多样性下降的主要原因之一.对已入侵的外来植物种可采用机械法、化学法、生物防治法加以控制,同时要采取相应的策略,预防新的外来植物种入侵和扩展.

The Invasion Danger of Outside Plant Species and Preventive Countermeasures

Outside plant species reach our country through certain ways from their original places,and can settle down under the natural state here, then breed and expand, and influnce a lot and bring much danger to the ecosystem. The invasion of outside plant species has already become the most thorny issue of ecological environment of our times. It not only endangers the structure and function of the invaded regional ecosystem, but also becomes one of the reasons for the decline of bio - diversity. Mechanical, chemical and biological measures can be taken to control the invading outside plant species, and corresponding tactics should be adopted to prevent the invasion and expansion of new outside plant species.