东寨港红树林沉积物中微生物群落结构特征及其对环境的响应

在红树林覆盖区域和光滩沉积物中存在着丰富的微生物群落,这些微生物在驱动红树林湿地的生物地球化学过程中起着至关重要的作用.深入了解东寨港红树林湿地沉积物中微生物的多样性分布特征,对探究东寨港红树林湿地中的生物地球化学过程和湿地的生态保护具有重要意义.本研究采用Illumina Miseq高通量测序技术,在东寨港的演丰西河...

Microbial Community Structure and Its Response to Environment in Mangrove Sediments of Dongzhai Port

There are abundant microbial communities in mangrove cover and plain sediments. These microorganisms play a vital role in driving the biogeochemical process of mangrove wetlands. It is of great significance to understand the diversity and distribution characteristics of microorganisms in the Dongzhai port mangrove wetland sediments for exploring the biogeochemical process and ecological protection of the wetland. In this study, we collected 108 sediment samples from Yanfengxi River and Sanjiang River in Dongzhai port, and Illumina Miseq high-throughput sequencing technology was used to analyze their geochemical and microbial community characteristics, and the effects of different environmental factors on microbial communities were also discussed. The results show that Proteobacteria is the dominant bacteria species in the mangrove sediments of Dongzhai port, and the microbial abundance and diversity in the sediments generally decrease with depth. There are significant differences in microbial community structure between Yanfengxi River and Sanjiang River. pH is the main environmental factor controlling the microbial community structure in the sediments of plain area, while salinity is controlling the microbial community structure in the surface sediments of mangroves. The above research results show that microorganism distribution and community structure inDongzhai port mangrove sediments are influenced by human activities, and microbial abundance and diversity of the change trend of decrease with depth as a whole. There exist obvious differences in microbial community structure from different sediment sampling areas, as a result of the dual function of natural factors (such as salinity, pH) and human factors (aquaculture).