The distribution status and characteristics of invasive alien plants in Daweishan National Forest Park were studied based on field investigation,literature review,network resources and interview survey,and the hazard levels were evaluated and graded.The results have sho...MORE The distribution status and characteristics of invasive alien plants in Daweishan National Forest Park were studied based on field investigation,literature review,network resources and interview survey,and the hazard levels were evaluated and graded.The results have shown that there are 24 species(including varieties)of ...