PRELIMINARY STUDY ON THE ALIEN INVASIVE AND HARMFU BIOTICES IN THE YELLOW RIVER DELTA

Seventy species of alien invasive biotices were identified and recorded in the Yellow River delta through investigation and referring to the relative literatures.Among the alien invasive species,fifteen species were harmful animals,seven species were harmful micro-organisms and forty-eight species were harmfu plants.Distribution of the alien invasive biotices were identified and preventable strategy was proposed.