Elevated nitrate simplifies microbial community compositions and interactions in sulfide-rich river sediments
文献类型：期刊论文
| 作者 | Li, Enze; Deng, Tongchu; Yan, Lei; Zhou, Jizhong; He, Zhili; Deng, Ye; Xu, Meiying |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021 |
| 卷号 | 750页码:- |
| 关键词 | River sediment Nitrate pollution Denitrification Community simplification Functional convergence |
| ISSN号 | 0048-9697 |
| 英文摘要 | Excessive nitrate in water systems is prevailing and a global risk of human health. Polluted river sediments are dominated by anaerobes and often the hotspot of denitrification. So far, little is known about the ecological effects of nitrate pollution on microbial dynamics, especially those in sulfide-rich sediments. Here we simulated a nitrate surge and monitored the microbial responses, as well as the changes of important environmental parameters in a sulfide-rich river sediment for a month. Our analysis of sediment microbial communities showed that elevated nitrate led to (i) a functional convergence at denitrification and sulfide oxidation, (ii) a taxonomic convergence at Proteobacteria, and (iii) a significant loss of biodiversity, community stability and other functions. Two chemolithotrophic denitrifiers Thiobacillus and Luteimonas were enriched after nitrate amendment, although the original communities were dominated by methanogens and syntrophic bacteria. Also, serial dilutions of sediment microbial communities found that Thiobacillus thiophilus dominated 18/30 communities because of its capability of simultaneous nitrate reduction and sulfide oxidation. Additionally, our network analysis indicated that keystone taxa seemed more likely to be native auxotrophs (e.g., syntrophic bacteria, methanogens) rather than dominant denitrifiers, possibly because of the extensive interspecific cross-feeding they estabilished, while environment perturbations probably disrupted that cross-feeding and simplified microbial interactions. This study advances our understanding of microbial community responses to nitrate pollution and possible mechanism in the sulfide-rich river sediment. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46109]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 2.Univ Oklahoma, Inst Environm Genom, Norman, OK 73019 USA 3.Sun Yat Sen Univ, Environm Microbi Res Ctr, Sch Environm Sci & Engn, Southern Marine Sci & Engn Guangdong Lab Zhuhai, 4.Guangdong Acad Sci, Guangdong Inst Microbiol, Guangdong Prov Key Lab Microbial Culture Collect, Guangzhou 510070, Peoples R China 5.State Key Lab Appl Microbiol Southern China, Guangzhou 510070, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Enze,Deng, Tongchu,Yan, Lei,et al. Elevated nitrate simplifies microbial community compositions and interactions in sulfide-rich river sediments[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,750:-. |
| APA | Li, Enze.,Deng, Tongchu.,Yan, Lei.,Zhou, Jizhong.,He, Zhili.,...&Xu, Meiying.(2021).Elevated nitrate simplifies microbial community compositions and interactions in sulfide-rich river sediments.SCIENCE OF THE TOTAL ENVIRONMENT,750,-. |
| MLA | Li, Enze,et al."Elevated nitrate simplifies microbial community compositions and interactions in sulfide-rich river sediments".SCIENCE OF THE TOTAL ENVIRONMENT 750(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。