人类影响的河口过渡带中的病毒：分布、代谢潜力和环境风险

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-04-29 DOI:10.1016/j.watres.2025.123750

Yunmeng Chu , Xiaoxiao Dong , Shiyun Fang , Lihong Gan , Xuezhu Lee , Lei Zhou

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引用次数: 0

摘要

河口作为海洋和陆地系统之间的动态生态界面，具有生产力高、微生物群落复杂的特点。病毒对河口生态系统的微生物过程发挥关键的调节作用，影响生态功能并促进环境动态。尽管它们意义重大，但人们对河口病毒的多样性和生态作用仍知之甚少。研究了中国30个亚热带河口的病毒生物地理格局、代谢潜力及其影响因素。少数河口病毒(<；22%)表现出与已知病毒的同源性，并且病毒簇与其他环境的低重叠突出了它们的新颖性和栖息地特异性。Mantel试验和随机森林分析发现，盐度、温度、营养物质和污染物是影响病毒组成和功能特征的关键因素。此外，病毒和宿主之间的相关性分析证实了显著的病毒-宿主相互作用，而功能分析强调了环境条件和水平基因转移在形成与元素生物地球化学循环相关的辅助代谢基因中的作用，特别是磷、硫和氮。病毒基因组中抗生素耐药基因（ARGs）和毒力因子（VFs）的检测强调了病毒在这些生态系统中作为ARGs和VFs储存库的作用。这些结果表明了非生物和宿主因素对亚热带河口过渡带病毒群落结构的深刻影响，强调了代谢基因在生物地球化学循环中的生态意义。通过澄清这些相互作用，本研究促进了对河口环境中病毒对生态系统功能和生物地球化学动力学的贡献的理解。

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Viruses in human-impacted estuarine ecotones: Distribution, metabolic potential, and environmental risks

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Viruses in human-impacted estuarine ecotones: Distribution, metabolic potential, and environmental risks

Estuaries, as dynamic ecological interfaces between marine and terrestrial systems, are characterized by high productivity and intricate microbial communities. Viruses exert critical regulatory effects on microbial processes, influencing ecological functions and contributing to environmental dynamics in estuarine ecosystems. Despite their significance, the diversity and ecological roles of estuarine viruses remain insufficiently understood. This study explored the viral biogeographic patterns, metabolic potential, and influencing factors in 30 subtropical estuaries in China. Few estuarine viruses (< 22 %) exhibited homology with known viruses, and the low overlap of virus clusters with other environments highlights their novelty and habitat specificity. Mantel tests and random forest analysis identified salinity, temperature, nutrients, and pollutants as key factors influencing viral composition and functional profiles. In addition, correlation analysis between virus and host confirmed significant virus-host interactions, while functional analyses highlighted the role of environmental conditions and horizontal gene transfer in shaping auxiliary metabolic genes linked to elemental biogeochemical cycles, particularly phosphorus, sulfur, and nitrogen. The detection of antibiotic resistance genes (ARGs) and virulence factors (VFs) within viral genomes underscores the role of viruses as reservoirs of ARGs and VFs in these ecosystems. These results demonstrate the profound influence of abiotic and host factors on viral community structures in subtropical estuarine ecotones and underscore the ecological significance of metabolic genes in biogeochemical cycling. By clarifying these interactions, this study advances the understanding of viral contributions to ecosystem functioning and biogeochemical dynamics in estuarine environments.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.