Gao Peng-Fei, Wang Peng, Huang Yi, Ding Ming-Jun, Zhang Hua, Nie Ming-Hua, Huang Gao-Xiang
School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China.
Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China.
Huan Jing Ke Xue. 2023 Mar 8;44(3):1475-1483. doi: 10.13227/j.hjkx.202203277.
Bacterioplankton communities play an important role in nutrient cycling and organic matter decomposition in urban lakes. Based on high-throughput sequencing, we analyzed the temporal (April, June, and August) and urban-suburban difference and assembly of bacterioplankton communities in lakes of Nanchang City. Our results showed that:① the dominant bacterioplankton communities in the lakes were Actinobacteria (41.60%), Proteobacteria (22.29%), Cyanobacteria (16.21%), and Bacteroidota (10.17%). ② There were significant differences in bacterial communities between April, June, and August but not between urban lakes and suburban lakes. The abundance of 10 bacteria, mainly Proteobacteria (April>June>August) and Cyanobacteria (June>August>April), was significantly different among the three months. There was a significant distance decay pattern in June, which was not seen in April and August. ③ The proportion of non-freshwater bacteria was significantly higher in June than that in April and August, but there were no significant differences between urban lakes and suburban lakes. ④ Deterministic processes dominated the assembly of bacterioplankton communities, whereas stochastic processes had a lower contribution. Water temperature (WT) was the environmental factor that best explained the changes in bacterioplankton communities in the lakes.
浮游细菌群落对城市湖泊的养分循环和有机物分解起着重要作用。基于高通量测序，我们分析了南昌市湖泊浮游细菌群落的时间变化（4月、6月和8月）、城乡差异及其组装过程。我们的结果表明：①湖泊中主要的浮游细菌群落为放线菌门（41.60%）、变形菌门（22.29%）、蓝细菌门（16.21%）和拟杆菌门（10.17%）。②4月、6月和8月的细菌群落存在显著差异，但城市湖泊和郊区湖泊之间没有显著差异。三个月间，主要是变形菌门（4月>6月>8月）和蓝细菌门（6月>8月>4月）的10种细菌的丰度存在显著差异。6月存在显著的距离衰减模式，4月和8月未观察到。③6月非淡水细菌的比例显著高于4月和8月，但城市湖泊和郊区湖泊之间没有显著差异。④确定性过程主导了浮游细菌群落的组装，而随机过程的贡献较小。水温（WT）是最能解释湖泊中浮游细菌群落变化的环境因素。
