Invasion by Alien Species in China and Ecological Safety in China

Though alien species can contribute to biodiversity in an area, it brings some negative influences. The invasion by alien organisms could heavily cause damage to ecological environment, biodiversity and economic system. The situation of invasion of alien species in China becomes more and more serious. Number of alien species is increasing and the records showed that they come from all of the world. The area invaded is enlarged and ecosystems invaded are various. Because of the invasion becoming more and more serious, the potential ecological damage can't be neglected.