Soil Microbial Diversity of Marshes Covered by Suaeda salsa and Spartina alternifora in Yancheng Wetland

摘要

The introduction of invasive species, Spartina alternifora, in the tidal marshes of Yancheng wetlandhas been considered deleterious to habitat quality. However, the extent to which the replacement ofSuaeda salsa by S. alternifora affects the soil environment is unknown. In this study, we examined thesoil physicochemical characteristics and microbial communities of rhizosphere and non-rhizospherein soils adjacent to Spartina and Suaeda marshes. The dynamics of microbial community were similarin both the types of plants, and the roots were conducive to microbial growth. The total number ofmicroorganisms and microbial activity showed a seasonal fluctuation, increasing from spring throughsummer and then declining gradually to the lowest in spring. The data provided herein also indicatedthat values of organic carbon, biomass carbon, size of microbial populations, and activity were higherin Suaeda than in Spartina marsh, which suggests that differences in vegetation cover significantlyaffect the soil environment and microbial community. Therefore, we suggest that the policy to introduceS. alternifora into this area should be reconsidered.