Mo Yuanyuan, Abdolahpur Monikh Fazel, Jaffer Yousuf Dar, Mugani Richard, Ionescu Danny, Chen Guogui, Yang Jun, Grossart Hans-Peter
Department of Plankton and Microbial Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany; Aquatic EcoHealth Group, Key Laboratory of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Key Laboratory of Urban Environment and Health, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China.
Department of Plankton and Microbial Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany; Department of Chemical Sciences, University of Padua, via Marzolo 1, Padova 35131, Italy; Institute for Nanomaterials, Advanced Technologies, and Innovation, Technical University of Liberec, Bendlova 1409/7, Liberec 460 01, Czech Republic.
J Hazard Mater. 2025 Apr 5;487:137062. doi: 10.1016/j.jhazmat.2024.137062. Epub 2025 Jan 3.
Ecological impacts of tire wear particles (TWPs) on microbial communities and biogeochemical cycles in freshwater remain largely unknown. Here, we conducted a microcosm experiment to investigate interactions between the overlying water and sediment without and with TWPs addition in a rural vs. urban lake system. Our results revealed the degree of change in microbial community diversity in water is higher than that in sediment following TWPs addition. For bacterial communities, TWPs addition changed their composition in the water, but only little in the sediment. For fungal communities, TWPs addition changed their composition both in water and sediments. Furthermore, in water, TWPs addition increased network complexity between bacteria-bacteria, fungi-fungi and bacteria-fungi in the urban system but reduced it in the rural one. In contrast, TWPs presence did not significantly change network complexity among microbial communities in the sediment of both lakes. Isotope labeling analysis uncovered that based on a short-term (6 hours) incubation experiment, TWPs addition did not significantly change carbon nor nitrogen cycling in the water. Yet, certain changes could be observed, especially in the long-term experiment (1 month), indicating that TWPs pollution has the potential to impact elemental cycling and thus ecosystem functions by altering microbial communities. Our results provide new insights into TWPs-induced ecological effects on microorganisms and potential biogeochemical consequences in a rural vs. urban lakes.
轮胎磨损颗粒（TWPs）对淡水微生物群落和生物地球化学循环的生态影响在很大程度上仍不为人知。在此，我们进行了一项微观实验，以研究在农村与城市湖泊系统中，添加和不添加TWPs情况下上覆水与沉积物之间的相互作用。我们的结果显示，添加TWPs后，水中微生物群落多样性的变化程度高于沉积物中的变化程度。对于细菌群落，添加TWPs改变了水中细菌的组成，但对沉积物中细菌组成的影响很小。对于真菌群落，添加TWPs改变了水和沉积物中真菌的组成。此外，在水中，添加TWPs增加了城市系统中细菌-细菌、真菌-真菌和细菌-真菌之间的网络复杂性，但降低了农村系统中的网络复杂性。相比之下，TWPs的存在并未显著改变两个湖泊沉积物中微生物群落之间的网络复杂性。同位素标记分析发现，基于短期（6小时）培养实验，添加TWPs并未显著改变水中的碳循环和氮循环。然而，可以观察到某些变化，尤其是在长期实验（1个月）中，这表明TWPs污染有可能通过改变微生物群落来影响元素循环，进而影响生态系统功能。我们的研究结果为TWPs对农村与城市湖泊中微生物的生态影响以及潜在的生物地球化学后果提供了新的见解。
