Floristic Analysis of Alien Invasive Plants in Guizhou Province
For this study,we focused on the alien invasive plants found in Guizhou province.We compiled a list of invasive plants in the province by conducting field research and digital specimen inquiry.We then analyzed the species composition,hazard grade,taxonomic composition,origin,and life type of these plants.The findings reveal that there were 144 species belonging to 109 genera across 35 families in Guizhou Province.Among the total number of foreign invasive plants,the top three families were Asteraceae(29 species in 25 genera),Fabaceae(17 species in 13 genera),and Amaranthaceae(13 species in 8 genera).Additionally,there were 16 species classified as grade Ⅰ,27 as grade Ⅱ,22 as grade Ⅲ,32 as grade Ⅳ,and 47 as grade Ⅴ.Furthermore,the composition of foreign invasive plant species in Guizhou province was quite simple and exhibited clear tropical distribution traits,with percentages of 57.14％,55.96％,and 61.00％at the family,genus,and species levels,respectively.Additionally,a significant majority of 82.0％of invasive plants originated from the Americas.Herbaceous plants held a dominant position,accounting for 80.56％of the total.Our research revealed that the invasive plants in Guizhou province are predominantly herbaceous plants originating from tropical America.As such,it is crucial to stay alert for species with similar traits.
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