Abstract

Interspecies interaction is the basis link among different plants. However, plant interaction has not been pay more attention in many studies of plant diversity-invasibility relationship. In this study, artificial plant communities with different diversity gradients (1, 2, 4 and 8) were established. Two comparative experimental blocks were established with changing the distribution of invasive plants and native plants, i.e., the staggered and non-staggered distribution. The results showed that species richness and functional group richness were significantly negatively correlated with the biomass of S. Canadensis under staggered distribution, while there was no significant relationships under non-staggered distribution. The interspecific competition intensity of S. Canadensis under the staggered distribution was significantly stronger than that under the non-staggered distribution. The results showed that the distribution pattern of native and invasive plants may be an important factor affecting the resistance of plant diversity to invasion of alien plants.

Keywords: Species richness; Functional groups; Solidago canadensis; Invasion; Interspecific interaction