Abstract:

The aim was to study the invasive mechanism in East Guangdong. The clonality and invasiveness of invasive plants in East Guangdong were counted and analyzed through field investigation and consulting literature. The results showed that there were 127 species of invasive plants, belonging to 48 families, in East Guangdong, about 70.08% of them were native to America, especially originated in South America (51.18%). Invasiveness of alien plants was divided into three grades according to their harm degree to invasive area, such as strong, middle and weak, etc. 22, 42 and 63 species belonged to the strong, middle and weak invasiveness, respectively. The number of invasive plants with clonality was about 55 species and accounted for 43.31% of all invasive plants. 10, 15 and 30 species with clonality belonged to the strong, middle and weak invasiveness, and about 45.45%, 35.71% and 47.62%, respectively. There is certain positive correlation between the clonality and invasiveness of invasive plants in East Guangdong, the alien plants with clonality can quickly grow organism, cumulative biomass and be easy to become single dominant species by means of clonal propagation and clonal growth in community invaded, so the clonality is one of important mechanism of the successful invasion for some alien species in East Guangdong.