Microbial Community Structure and Environmental Driving Factors in Layer Sediments from Fishing Grounds of Four Freshwater around Dongting Lake Water System
In order to explore the microbial diversity,community structure and environmental influencing factors of surface sediments in fishing grounds of freshwater lakes,the surface sediments from fishing grounds of four freshwater lakes around Dongting Lake water system were collected,then microbial diversity and community structure were ana-lyzed using 16S rRNA gene amplicon high-throughput sequencing.Meanwhile,the microbial diversity,community structure and response relationship with environmental factors were analyzed.The results showed that nitrogen,phos-phorus and organic pollution problems are serious of layer sediments from fishing grounds of four freshwater lakesaround Dongting Lake.The species abundance in four lakes are West Lake in Jinshi City>Beimin Lake in Li County>Anle Lake in Hanshou County>East Lake in Huarong County,the species diversity in four lakes are Anle Lake in Hanshou County>Beimin Lake in Li County>West Lake in Jinshi City>East Lake in Huarong County.The relative abundance of Proteobacteria in sediments is the largest,and the genera with no clear taxonomic information or taxo-nomic name and the genera that could not be isolated and cultured in vitro are the main bacterial genus.Spearman's reciprocity analysis showed that pH,NO3--N,NH4+-N,OP and IP are the main factors affecting the microbial commu-nity structure in sediments.Redundancy analysis showed that NH4+-N was the key environmental driving factor affect-ing the microbial community structure in sediments.The above results could provide a theoretical basis for the man-agement and maintenance of fishing grounds of freshwater lakes,and promote the healthy and sustainable development of aquaculture industry in lakes around Dongting Lake water system.
fishing grounds of freshwater lakeslayer sedimentsenvironmental factorsmicrobial community structuremicrobial diversityhigh-throughput sequencing
万方数据
维普
