文献类型：期刊文献

英文题名：Spatial characteristics of microbial communities and their functions in sediments of subtropical Beibu Gulf, China

作者：Che, Wenxue[1];Zhao, Hui[1,2,3,4];Man, Ying[1];Tan, Xiao[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China;[3]Guangdong Ocean Univ, Res Ctr Coastal Environm Protect & Ecol Resilience, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Cooperat Res Ctr Offshore Marine Environm Change, Zhanjiang 524088, Peoples R China

年份：2025

卷号：207

外文期刊名：MARINE ENVIRONMENTAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:001448724000001)、、EI(收录号：20251118048574)、Scopus(收录号：2-s2.0-86000496065)、WOS

基金：This work was supported by the National Natural Science Foundation of China (No. 42076162) , Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (No. 311020004) , Guangdong Basic and Applied Basic Research Foundation (No. 2022A1515110467) , program for scientific research start-up funds of Guangdong Ocean University and The Belt and Road Special Foundation of The National Key Laboratory of Water Disaster Prevention (No. 2022491511) .

语种：英文

外文关键词：Marine sediment; Bacterial community; Functional prediction; Sulfur cycling

外文摘要：Understanding the intricate relationship between marine geography and microbial functions is crucial for marine conservation and management. In this study, we conducted a comprehensive analysis of bacterial composition and function in nearshore and offshore sediments of the Beibu Gulf using 16S rRNA high-throughput sequencing. The results showed that Proteobacteria (average relative abundance: 27.07 %) and Desulfobacterota (average relative abundance: 12.28 %) were the most dominant phyla across all stations, while Woeseiaceae (3.26 %-8.31 %) and Anaerolineaceae (0.61 %-7.43 %) could serve as potential indicator species for pollution. In our study area, the alpha-diversity of bacterial communities in sediment samples showed an initial increase from coastal to offshore regions, followed by a decrease with further distance from the coastlines. The composition of sediment bacterial communities was mainly influenced by total phosphorus (R2 = 0.183, p < 0.01) and salinity (R2 = 0.550, p < 0.01). Furthermore, the sulfur (S) cycling genes of KEGG pathways displayed significant variations with the distance from shore, implying that S oxidation dominated in nearshore sediments, while S reduction occurred mainly in offshore sediments, which was attributed to the differences in redox conditions across diverse marine environments. These findings will not only enhance our current understanding of the intricate relationship between marine geography and microbial functions but also contribute to elucidating the biogeochemical characteristics of the Beibu Gulf. This research will provide valuable information and a solid scientific basis for the conservation and management of various marine areas.