| Title: | CS(2) increasing CH(4)-derived carbon emissions and active microbial diversity in lake sediments |
| Author(s): | Wang J; Chu YX; Schafer H; Tian G; He R; |
| Address: | "Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China. School of Life Sciences, University of Warwick, Coventry, UK. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China; College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China. Electronic address: heruo@zju.edu.cn" |
| DOI: | 10.1016/j.envres.2022.112678 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "Lakes are important methane (CH(4)) sources to the atmosphere, especially eutrophic lakes with cyanobacterial blooms accompanied by volatile sulfur compound (VSC) emissions. CH(4) oxidation is a key strategy to mitigate CH(4) emission from lakes. In this study, we characterized the fate of CH(4)-derived carbon and active microbial communities in lake sediments with CS(2) used as a typical VSC, based on the investigation of CH(4) and VSC fluxes from Meiliang Bay in Lake Taihu. Stable isotope probing microcosm incubation showed that the efficiency of CH(4)-derived carbon incorporated into organic matter was 21.1% in the sediment with CS(2) existence, which was lower than that without CS(2) (27.3%). SO(4)(2-)-S was the main product of CS(2) oxidation under aerobic condition, accounting for 59.3-62.7% of the input CS(2)-S. CS(2) and CH(4) coexistence led to a decrease of methanotroph and methylotroph abundances and stimulated the production of extracellular polymeric substances. CS(2) and its metabolites including total sulfur, SO(4)(2-) and acid volatile sulfur acted as the main drivers influencing the active microbial community structure in the sediments. Compared with alpha-proteobacteria methanotrophs, gamma-proteobacteria methanotrophs Methylomicrobium, Methylomonas, Crenothrix and Methylosarcina were more dominant in the sediments. CH(4)-derived carbon mainly flowed into methylotrophs in the first stage. With CH(4) consumption, more CH(4)-derived carbon flowed into non-methylotrophs. CS(2) could prompt more CH(4)-derived carbon flowing into non-methanotrophs and non-methylotrophs, such as sulfur-metabolizing bacteria. These findings can help elucidate the influence of VSCs on microorganisms and provide insights to carbon fluxes from eutrophic lake systems" |
| Keywords: | Carbon/metabolism Carbon Cycle *Cyanobacteria/metabolism *Lakes/microbiology Methane CS(2) oxidation rate Methane oxidation Methanotrophs Sulfur-containing compounds Sulfur-metabolizing microorganisms; |
| Notes: | "MedlineWang, Jing Chu, Yi-Xuan Schafer, Hendrik Tian, Guangming He, Ruo eng Research Support, Non-U.S. Gov't Netherlands 2022/01/10 Environ Res. 2022 May 15; 208:112678. doi: 10.1016/j.envres.2022.112678. Epub 2022 Jan 6" |
