Yan Zezheng, Jin Yanjian, Li Tiejun, Zhang Xiaoling, Yang Qiao, Ren Chengzhe, Qiao Ling
College of Marine Science & Technology, Zhejiang Ocean University, Zhoushan 316004, China.
Marine Ecological and Environmental Monitoring Center of Zhejiang Province, Zhoushan 316021, China.
Microorganisms. 2025 Apr 7;13(4):837. doi: 10.3390/microorganisms13040837.
This study investigated the monthly variations of bacterial communities in the surface seawater of the Wenzhou coastal area and their influencing factors, while exploring the ecological functions of microbial communities. The results indicated that the surface seawater bacterial communities in this region exhibited high diversity, with significantly higher diversity observed in the winter half-year compared to the summer half-year. The bacterial community structures showed distinct monthly variations, with high similarity between adjacent months, particularly from June to September. The dominant bacterial taxa primarily included Proteobacteria represented by the , , and Rhodobacteraceae; Bacteroidota represented by Flavobacteriaceae; and Cyanobacteria mainly composed of and . Temperature and nitrate ions were identified as the environmental factors most strongly correlated with monthly bacterial community variations, while dissolved oxygen, nitrite ions, and total organic carbon also showed significant correlations with relative abundances of certain taxa. Predictions of the bacterial community's ecological functions revealed that chemoheterotrophic functions were most abundant throughout the year, whereas photoautotrophic functions were primarily enriched in summer. Denitrification and other nitrogen cycling-related functions also displayed obvious monthly variations. Collectively, this study provides valuable insights into the temporal changes in coastal microbial communities and their interactions with different environments.
本研究调查了温州沿海地区表层海水中细菌群落的月度变化及其影响因素，同时探讨了微生物群落的生态功能。结果表明，该地区表层海水细菌群落具有高度多样性，冬季半年的多样性显著高于夏季半年。细菌群落结构呈现出明显的月度变化，相邻月份之间相似度较高，尤其是6月至9月。主要的优势细菌类群包括以 、 和红杆菌科为代表的变形菌门；以黄杆菌科为代表的拟杆菌门；以及主要由 和 组成的蓝细菌门。温度和硝酸根离子被确定为与月度细菌群落变化相关性最强的环境因素，而溶解氧、亚硝酸根离子和总有机碳也与某些类群的相对丰度显示出显著相关性。对细菌群落生态功能的预测表明，化学异养功能全年最为丰富，而光合自养功能主要在夏季富集。反硝化作用和其他与氮循环相关的功能也呈现出明显的月度变化。总体而言，本研究为沿海微生物群落的时间变化及其与不同环境的相互作用提供了有价值的见解。
