Microbial diversity accumulates in a downstream direction in the Three Gorges Re

本文刊于: 《Journal of Environmental Sciences》 2021年第0期

关键词:
ThreeGorgesDam Microbialsourcetracking M

Keywords:
Three Gorges Dam,Microbial source tracking,Microbial community coalescence,Immigration,Accumulating effect
摘要
     Organic and inorganic materials migrate downstream and have important roles in regulating environmental health in the river networks.However,it remains unclear whether and how a mixture of materials(i.e.,microbial species) from various upstream habitats contribute to microbial community coalescence upstream of a dam.Here we track the spatial variation in microbial abundance and diversity in the Three Gorges Reservoir based on quantitative PCR and 16 S rRNA gene high-throughput sequencing data.We further quantitatively assess the relative contributions of microbial species from mainstem,its tributaries,and the surrounding riverbank soils to the area immediately upstream of the Three Gorges Dam(TGD).We found an increase of microbial diversity and the convergent microbial distribution pattern in areas immediately upstream of TGD,suggesting this area become a new confluence for microbial diversity immigrating from upstream.Indeed,the number of shared species increased from upstream to TGD but unique species decreased,indicating immigration of various sources of microbial species overwhelms local environmental conditions in structuring microbial community close to TGD.By quantifying the sources of microbial species close to TGD,we found little contribution from soils as compared to tributaries,especially for sites closer to TGD,suggesting tributary microbes have greater influence on microbial diversity and environmental health in the Three Gorges Reservoir.Collectively,our results suggest that tracking microbial geographic origin and evaluating accumulating effects of microbial diversity shed light on the ecological processes in microbial communities and provide information for regulating aquatic ecological health.

基金项目:
supportedbytheNationalKeyR&DProgramofChina(No.2016YFC0502204);theNationalNaturalScienceFoundationofChina(Nos.41672331,U1906223,41807316)

上一篇:In situ construction of Z-scheme FeS2/Fe2O3 pho
下一篇:Review on the NO removal from flue gas by oxidation methods

分享到: 分享Microbial diversity accumulates in a downstream direction in the Three Gorges Re到腾讯微博           收藏
评论排行
公告 
相关期刊文献推荐
相关会议文献推荐
相关硕士文献推荐
相关博士文献推荐