Modern Social Science Research

Objective To explore the occurrence and harm degree of alien invasive species in Guizhou and the factors leading to their spread, and to provide theoretical data and basis for further prevention and control in the future. Methods Taking Weng an County, Qiannan Prefecture, Guizhou Province as an example, the author investigated and analyzed the invasive status of alien invasive plants in 2 sub-district offices in 11 townships and towns of the county, as well as the potential impact of human disturbance factors on the number of alien invasive plant species, and compared the difference in the number of alien invasive plant species in key areas such as natural protection areas and common areas in the county. Results The results were as follows: There were 93 species of invasive alien plants in the county, belonging to 71 genera and 31 families, among which 42.39% were malignant invasive species and severe invasive species. Forest ecosystem had the highest habitat preference for invasive alien plants, accounting for 25%. In terms of the origin information of invasive alien plants, 65% of invasive alien plants originated from tropical America. In terms of introduction reasons, the highest proportion of ornamental green plants introduced was 42%. There were significant positive and negative correlations between the number of invasive alien plant species and the population of township street and the global elevation, respectively. Conclusion Human activity factors are significantly affecting the spread and diffusion of alien invasive species. There was no significant difference between the occurrence intensity of species of invasive plants in all forest farm protected areas, nature parks and common areas in the county. Even key areas such as protected areas also suffered from invasive plants with frequent human flow activities. In summary, corresponding measures should be taken to limit and prevent the invasion of foreign invasive plants in the county, and timely monitor and prevent the further spread of foreign invasive plants.

Invasive plants; Habitat preference; Human interference; Natural reserve