Abstract:
To explore the relationship between habitat types and community invasibility in relation to the phylogenetic characteristics of herbaceous plant communities (phylogenetic diversity, phylogenetic relationships,and phylogenetic structure), a survey was conducted in three habitats (forest, wetland, and grassland) across eight urban parks in Beijing. Phylogenetic diversity analysis and regression analysis were performed, comparing the differences in community invasibility across the habitats and analyzing the influence of phylogenetic traits on the invasibility of different habitats. The results showed that the invasibility of the community was the highest in the forest habitat and the lowest in the grassland habitat. Base on simple linear regression analysis, communitiy invasibility is not significantly correlated with phylogenetic traits in forest habitat. In wetland habitats, community invasibility is significantly negatively correlated with phylogentic diversity of native communities, while it is positively correlated with the mean nearest taxonomic distance between invasive and native plants. In grassland habitats, both the net phylogentic relatedness index and the nearest taxonomic index of native plant communities are significantly negatively correlated with community invasibility. The results of the multiple regression analysis suggest that in forest habitats, the more clustered native community and the farther its phylogenetic distance to the invasive community, the lower its invasibility. In wetland habitats,the higher the phylogenetic diversity of the native community and the closer its phylogenetic distance from the invasive community, the lower its invasitbility. In view of the problem of urban plant invasion, it is necessary to formulate differentiated prevention and control strategies according to different habitat types, integrate multi-dimensional research, technology application and social participation, and establish a more comprehensive management framework for invasive plants in urban parks.