Curvilinear effects of invasive plants on plant diversity: plant community invaded by Sphagneticola trilobata.

ABSTRACT: The effects of invasive plants on the species diversity of plant communities are controversial, showing either a positive or negative linear relationship. Based on community data collected from forty 5 m×5 m plots invaded by Sphagneticola trilobata in eight cities across Hainan Island, China, we found S. trilobata decreased plant community diversity once its cover was beyond 10%. We demonstrated that the effects of invasive/native plants on the plant diversity of communities invaded by S. trilobata were curvilinear. These effects, which showed peaks under different degrees of vegetation cover, appeared not only for S. trilobata and all invasive plants, but also for all native plants. Invasive plants primarily had negative effects on plant diversity when they became abundant at a much lower

SUBMITTER: Qi SS 

PROVIDER: S-EPMC4245253 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature