Numberger Daniela, Zoccarato Luca, Woodhouse Jason, Ganzert Lars, Sauer Sascha, Márquez Jaime Ricardo García, Domisch Sami, Grossart Hans-Peter, Greenwood Alex D
Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Strasse 17, 10315 Berlin, Germany; Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775 Stechlin, Germany.
Leibniz Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775 Stechlin, Germany; University of Natural Resources and Life Sciences, Vienna, Department of Biotechnology, Institute of Computational Biology, Muthgasse 18, 1190 Vienna, Austria.
Sci Total Environ. 2022 Nov 1;845:157321. doi: 10.1016/j.scitotenv.2022.157321. Epub 2022 Jul 15.
Freshwater ecosystems are characterized by complex and highly dynamic microbial communities that are strongly structured by their local environment and biota. Accelerating urbanization and growing city populations detrimentally alter freshwater environments. To determine differences in freshwater microbial communities associated with urbanization, full-length 16S rRNA gene PacBio sequencing was performed in a case study from surface waters and sediments from a wastewater treatment plant, urban and rural lakes in the Berlin-Brandenburg region, Northeast Germany. Water samples exhibited highly habitat specific bacterial communities with multiple genera showing clear urban signatures. We identified potentially harmful bacterial groups associated with environmental parameters specific to urban habitats such as Alistipes, Escherichia/Shigella, Rickettsia and Streptococcus. We demonstrate that urbanization alters natural microbial communities in lakes and, via simultaneous warming and eutrophication and creates favourable conditions that promote specific bacterial genera including potential pathogens. Our findings are evidence to suggest an increased potential for long-term health risk in urbanized waterbodies, at a time of rapidly expanding global urbanization. The results highlight the urgency for undertaking mitigation measures such as targeted lake restoration projects and sustainable water management efforts.
淡水生态系统的特点是拥有复杂且高度动态的微生物群落，这些群落受到当地环境和生物群的强烈影响。城市化进程的加速和城市人口的增长对淡水环境造成了不利影响。为了确定与城市化相关的淡水微生物群落差异，在德国东北部柏林 - 勃兰登堡地区的一个案例研究中，对一家污水处理厂、城市湖泊和农村湖泊的地表水及沉积物进行了全长16S rRNA基因的PacBio测序。水样显示出高度特定于栖息地的细菌群落，多个属表现出明显的城市特征。我们识别出了与城市栖息地特定环境参数相关的潜在有害细菌群体，如艾利斯菌属、大肠埃希菌/志贺菌属、立克次氏体属和链球菌属。我们证明，城市化改变了湖泊中的自然微生物群落，并通过同时升温与富营养化，创造了有利于包括潜在病原体在内的特定细菌属生长的条件。我们的研究结果表明，在全球城市化迅速扩张的当下，城市化水体中长期健康风险的可能性增加。结果凸显了采取缓解措施的紧迫性，如针对性的湖泊恢复项目和可持续的水资源管理努力。
