文献类型：期刊文献

英文题名：Compositional changes of sedimentary microbes in the Yangtze River Estuary and their roles in the biochemical cycle

作者：Liu, Lili[1,2];Sun, Feifei[1];Zhao, Hanbin[1];Mi, Haosheng[1];He, Siqi[1];Chen, Ya[3];Liu, Ying[1];Lan, Hailian[1];Zhang, Meng[1,2];Wang, Zhiping[3]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Environm Sci & Technol, Shanghai 200240, Peoples R China

年份：2021

卷号：760

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20204609496665);WOS:【SCI-EXPANDED(收录号:WOS:000607779400050)】；

基金：This work was sponsored by National Natural Science Foundation of China (41771513, 41907110, 51108262, 41001316) and National Key Research and Development Program of China (2018YFC1901000). In addition, we acknowledge the National Natural Science Foundation of China Open Research Cruise "Chuangxin-II" (NORC2018-03) for sample collection and data acquisition, which was funded by Shiptime Sharing Project (41749903) of the National Natural Science Foundation of China.

语种：英文

外文关键词：Yangze River Estuary; High-throughput sequencing; Community structure; Bacterial diversity

摘要：Due to the geographical circumstances, the Yangtze River Estuary (YRE) and the adjacent East China Sea are extensively influenced by both anthropogenic activities and environmental factors. To reveal the responses of microbes in surface sediment to environmental factors and their contributions to the biogeochemical cycle in this area, surface sediment and overlying water samples were collected at 21 stations from the estuary to the coastal region. Water and sediment parameters were determined, and 16S rRNA genes of microbes in sediment samples were sequenced using high throughput sequencing technology. The results indicated that ocean currents, sediment density (SD), nutrients, sulfate (SO4-2), and salinity were the key factors shaping the microbial communities. Coastal microbes were affected mainly by SD, whereas anthropogenic discharge might have been responsible for a decrease in indigenous microbial diversity in the ocean. Due to the anthropogenic discharge, the most representative bacteria in the nearshore were aerobic and chemoheterotrophic bacteria, including ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, and polyphosphate accumulating organisms. In the offshore, anaerobic bacteria, thermophilic bacteria, halophilic bacteria, sulfate-reducing bacteria, and sulfide oxidizing bacteria were the dominant bacteria, and these were characterized by strong solidarity and cooperative properties within the malnourished environment. In summary, these results provide a new perspective for revealing the biogeochemical significance of the bacterial lineages in the YRE, as well as constructive guidance for the management of the marginal sea ecosystems in distinct regions. (C) 2020 Elsevier B.V. All rights reserved.