Abstract: Plant community monitoring can provide theoretical guidance for the scientific management of wetland parks. We compared plant community characteristics between Sphagnum bog and Polytrichum bog and explored the interspecific relationships of dominant species and the mechanism underlying community composition. The results showed that characteristics of plant communities in Polytrichum bog showed a good efficiency of natural recovery, with the recovery of community composition and structure. The dominance of Polytrichum commune had a quadratic curve relationship with that of Pteridium aquilinum, in that P. aquilinumwith lower dominance (less than 40%) promoted the growth of P. commune and higher dominance (more than 40%) inhibited the growth of P. commune. P. aquilinum had an advantage of light competition, inhibited the growth of graminoid and forb species, and then significantly affected plant community diversity. Forb species played an important role in the maintenance of plant community diversity. In wetland park management, reasonable control of P. aquilinum growth is conducive to wetland water conservation function and plant diversity conservation.

Key words: urban greenspace, socioeconomic, environmental justice, urban ecology, spatial pattern