Characteristics of Microbial Structure of Typical Plant Communities in South Dongting Lake Poplar Clearing Area

As one of the most important lake wetland ecosystems in China, Dongting Lake plays a key role in maintaining regional ecological security. Due to the early economic development and other factors, large-scale planting of poplar has posed a serious threat to the biodiversity protection and wetland ecosystem security of Dongting Lake area. Therefore, ecological restoration project has been carried out to resolve this problem. In this research, the phyllosphere microorganism from five primary and natural regeneration plant communities in South Dongting Lake restoration area were analysed by using Illumina HiSeq sequencing platform. The results show that the Shannon index and β diversity of poplar bacteria community was higher than others, but the α and β diversity of poplar fungus community was lower than some herbaceous communities. Poplar had the most specific bacterial species and the native Phragmites communis community had the most specific fungal species. Gammaproteobacteria, Bacilli and Erysipelotrichia were the most abundant bacteria in all plant communities. Dothideomycetes and Sordariomycetes were the most abundant fungi in all plant communities. This study has explored the differences of microbial community structure in the main plant communities after ecological restoration in South Dongting Lake area, and provides theoretical support for ecological restoration of poplar clearing slashes in Dongting Lake area.