Li Jialong, Lu Yonglong, Chen Xueting, Wang Lianghui, Cao Zhiwei, Lei Haojie, Zhang Zhenjun, Wang Pei, Sun Bin
Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China; State Key Laboratory of Marine Environmental Science and International Institute of Sustainability Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China; State Key Laboratory of Marine Environmental Science and International Institute of Sustainability Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
Environ Res. 2025 Mar 1;268:120809. doi: 10.1016/j.envres.2025.120809. Epub 2025 Jan 9.
Human activities and ocean currents in the Taiwan Strait exhibit significant seasonal variation, yet the response of marine microbes to ocean changes under anthropogenic and climatic stress remains unclear. Using 16S rRNA gene amplicon sequencing, we investigated the spatiotemporal dynamics and functional variations of microbial communities in sediment samples. Our findings revealed distinct seasonal patterns in microbial diversity and composition. Proteobacteria, Desulfobacterota, and Crenarchaeota dominated at the phylum level, while Candidatus Nitrosopumilus, Woeseia, and Subgroup 10 were prevalent at the genus level. Iron concentrations, heavy metals and C/N ratio were primary factors influencing microbial communities during specific seasons, whereas sulfur content, temperature fluctuations, and heavy metals shaped the entire microbial structure and diversity. Core microbial groups, including Desulfobulbus, Subgroup 10, Unidentified Latescibacterota, and Sumerlaea, played essential roles in regulating community structure and functional transitions. Marker species, such as Aliidiomarina sanyensis, Spirulina platensis, Croceimarina litoralis and Sulfuriflexus mobilis, acted as seasonal indicators. Bacteria exhibited survival strategy akin to higher organisms, encompassing process of synthesis, growth, dormancy, and disease resistance throughout the seasonal cycle. Core microbial groups and marker species in specific seasons can serve as indicators for monitoring and assessing the health of the Taiwan Strait ecosystem.
台湾海峡的人类活动和洋流呈现出显著的季节性变化，然而在人为和气候压力下，海洋微生物对海洋变化的响应仍不明确。我们利用16S rRNA基因扩增子测序技术，研究了沉积物样本中微生物群落的时空动态和功能变化。我们的研究结果揭示了微生物多样性和组成的明显季节性模式。在门水平上，变形菌门、脱硫杆菌门和泉古菌门占主导地位，而在属水平上，硝化侏儒菌属、沃氏菌属和第10亚群较为普遍。铁浓度、重金属和碳氮比是特定季节影响微生物群落的主要因素，而硫含量、温度波动和重金属则塑造了整个微生物结构和多样性。核心微生物类群，包括脱硫球菌属、第10亚群、未鉴定的浮霉菌门和苏梅拉菌属，在调节群落结构和功能转变中发挥了重要作用。标记物种，如三湾阿里氏菌、钝顶螺旋藻、滨海十字菌和游动硫弯曲菌，充当了季节性指标。细菌表现出与高等生物类似的生存策略，在整个季节循环中包括合成过程、生长、休眠和抗病过程。特定季节的核心微生物类群和标记物种可作为监测和评估台湾海峡生态系统健康状况的指标。
