Study on the Composition and Distribution Characteristics of Invasive Plants in the Mountainous Areas of Beijing's Suburban Districts

SU Yuzheng

doi:10.3969/j.issn.1002-2724.2025.01.007

Abstract：Based on the a survey of vegetation in the natural mountains on the outskirts of Beijing,this paper analyzes the origin of species,composition characteristics,distribution pattern and application features.The results as follows:There are 329 plant species in this survey,of which 305 are native,accounting for 92.71％,while 24 species are exotic,comprising 7.29％,and 11 species are invasive,representing about 3.34％.The surveyed plants belong to 15 families,22 genera and 24 species of alien plants.The dominant families are Leguminous,Compositae and Convolvulaceae.Among the surveyed plants,there are 4 species of trees,5 species of shrubs,11 herbaceous plants and 4 species of vines.Among the invasive plants,there are 2 species of trees,no shrubs,7 herbaceous,and 2 species of vine.Of the alien plants,there are 10 species introduced from within China and 14 species from abroad.All Invasive plants are from abroad.Alien plants are primarily from Asia,while invasive plants are mainly from South America.Alien plant communities account for 41.59％of the total community,and invasive plant communities account for 30.97％,with most of them located at low altitudes.The entrance to roads and scenic areas are particularly concentrated with these plants.The phenomenon of plant invasion in the natural mountains on the outskirts of Beijing requires attention.Some alien species have shown invasive tendencies and should be taken seriously,such as Rhus Typhina,Pharbitis nil,Parthenocissus quinquefolia,Galinsoga parviflora,and Medicago sativa.A significant number of artificially introduced plants have escaped and begun to grow,thereby affecting the natural vegetation.Native plants should be prioritized in landscaping activities,and caution should be exercised when using species originating from abroad.