Alien invasive species in Inner Mongolia and their influence on the grassland

Biological invasion is seriously threatening the biodiversity and ecological security of Inner Mongolia grassland. At present,the attentions were only paid to the introduction of alien species in Inner Mongolia region and even the national,but the lacks of management resulted in alien species release into the environment which might bring a potential environmental disaster. Based on literature review and database of alien invasive species in China,the present paper classified the alien invasive species distributed and summarized the effects of alien invasive species to grassland in Inner Mongolia. The corresponding control measures were proposed to reduce the alien species invasion. According to statistics,two alien invasive plants Galinsoga parviflora and Cenchrus calyculatus has shown a tendency to spread,and other species require further investigation.