淀山湖沉积物微生物群落结构特征及影响因素  

Microbial Community Structure Characteristics and Influencing Factors in Sediments of Dianshan Lake

作　　者：黄昕洋 毛凌晨 李飞鹏[1] HUANG Xin-yang;MAO Ling-chen;LI Fei-peng(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《湿地科学与管理》2024年第3期58-64,共7页Wetland Science & Management

摘　　要：湖泊沉积物微生物多样性及群落结构关系到水质与水生态系统稳定。采用高通量测序技术分析了淀山湖表层沉积物中微生物群落的结构特征及影响因素。结果表明:淀山湖沉积物受人为活动影响显著,其中Cd的污染程度较高。不同区域物种多样性表现为湖西南区>湖北区>湖中区>湖东区。从门水平来看,优势门类主要为Proteobacteria、Chloroflexi和Acidobacteriota等;从属水平分析,优势菌属集中在uncultured_f__Anaerolineaceae、unclassified_c__Thermodesulfovibrionia和uncultured_f__Steroidobacteraceae。优势微生物与环境因子的相关性分析表明,TN、TP、Cd、Sb、Cu和Zn对微生物群落结构影响较大,TP和重金属是群落结构的制约因素。此外,uncultured_f__Anaerolineaceae、unclassified_o__Vicinamibacterales和Luteitalea属对Cd、Sb、Cu、Ni和Zn表现出耐受性。预防磷和重金属污染输入,加强对微生物的监测是淀山湖水环境保护的重点。The diversity and community structure of microorganisms in lake sediment are closely related to water quality and aquatic ecosystem stability.In this study,high-throughput sequencing technology was used to analyze the structural characteristics and influencing factors of microbial communities in the surface sediment of Dianshan Lake.The results showed that human activities have significant impact on lake sediment and the contamination level of Cd was high.The species diversity of different regions of the lake was shown as Southwest region>Northern region>Central region>Eastern region.At the phylum level,the dominant phylum were Proteobacteria,Chloroflexi and Acidobacteriota.At the genus level,the dominant genus were uncultured_f__Anaerolineaceae,unclassified_c__Thermodesulfovibrionia and uncultured_f__Steroidobacteraceae.The results of correlation between dominant microorganisms and environmental factors showed that TN,TP,Cd,Sb,Cu and Zn had great influence on microbial community structure,while TP and heavy metals were the restricting factors of microbial community structure.In addition,uncultured_f__Anaerolineaceae,unclassified_o__Vicinamibacterales and Luteitalea showed tolerance to Cd,Sb,Cu,Ni and Zn.Therefore,the prevention of phosphorous and heavy metals pollution,as well as improving the monitoring of microorganisms are the priority of water environment protection in Dianshan Lake.

关 键 词：淀山湖 沉积物 微生物 群落结构 环境因子 

分 类 号：X172[环境科学与工程—环境科学]