The Ecological Risk Assessment of Bullacta Exarata Invasion in the Yellow River Delta

In recent years, the rapid economic development as well as the increase in people entering and exiting help to promote the introduction of alien species. Risk evaluation of alien species is the basis of developing risk management of alien species and one the most effective method to prevent the intrusion of alien species. Ecological risk of alien species Bullacta exarata in Yellow River Delta was evaluated by this article. The result shows that Bullacta exarata has certain effects on ecological environment in Yellow River Delta, but these effects are acceptable. However, we need to be cautious in development and also prevent significant effects of mass reproduction of mud snail on the local ecological environment.