Deciphering microbial dynamics in coastal ecosystems under polycyclic aromatic hydrocarbon stress: Community assembly, interaction networks, and metabolic adaptations.
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| Název: | Deciphering microbial dynamics in coastal ecosystems under polycyclic aromatic hydrocarbon stress: Community assembly, interaction networks, and metabolic adaptations. |
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| Autoři: | Li M; Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264004, China; Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary, Yantai 264000, China., Wang H; Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264004, China; Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary, Yantai 264000, China; School of Earth Sciences, China University of Geosciences, Wuhan 430000, China. Electronic address: wanghongsong@mail.cgs.gov.cn., Chu H; Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264004, China; Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary, Yantai 264000, China., Wang Y; Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264004, China; Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary, Yantai 264000, China., Lu J; College of Geography and Environment, Shandong Normal University, Jinan, 250014, China. Electronic address: lujiaxing83@sdnu.edu.cn. |
| Zdroj: | Environmental research [Environ Res] 2025 Dec 15; Vol. 287, pp. 123179. Date of Electronic Publication: 2025 Oct 22. |
| Způsob vydávání: | Journal Article |
| Jazyk: | English |
| Informace o časopise: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE |
| Imprint Name(s): | Publication: <2000- > : Amsterdam : Elsevier Original Publication: New York, Academic Press. |
| Výrazy ze slovníku MeSH: | Polycyclic Aromatic Hydrocarbons*/toxicity , Polycyclic Aromatic Hydrocarbons*/analysis , Water Pollutants, Chemical*/toxicity , Water Pollutants, Chemical*/analysis , Microbiota*/drug effects, Geologic Sediments/microbiology ; Geologic Sediments/chemistry ; Estuaries ; Ecosystem ; Environmental Monitoring ; Rivers/microbiology ; Rivers/chemistry ; China |
| Abstrakt: | Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. The significant toxicity and carcinogenicity of polycyclic aromatic hydrocarbons (PAHs) have raised increasing concern about their contamination, particularly in coastal regions with intensive human activities and urbanization. However, limited information exists on microbial response mechanisms across varying levels of PAHs contamination. In this study, sediment samples at 18 locations along the Yantai inland river and estuary were collected in October 2024 to examine the partitioning and spatial dispersal of PAHs, while microbial community assembly, interaction networks, and metabolic adaptations were analysed using metagenomics. Results showed that the average ∑PAHs concentration in the estuary (27.95 ± 2.91 ng/g) was significantly lower than that in the river (77.54 ± 43.39 ng/g), with a correspondingly higher ecological risk in the river. High-molecular-weight (HMW) PAHs dominated in both estuary and river sediments due to their high hydrophobicity and stability. Microbial community analysis revealed increased microbial diversity and a higher abundance of PAHs-degrading microbes (e.g., Ruegeria, known for degrading low-molecular-weight PAHs) under higher PAHs contamination. Co-occurrence network and topological analyses demonstrated dual regulatory effects of PAHs stress on microbial interactions, where elevated PAHs contamination intensified interspecies connectivity while simultaneously inducing destabilizing negative covariance patterns that weakened microbial network integrity. Additionally, neutral community model analysis indicated that stochastic processes dominated community assembly, with higher proportions of stochasticity observed in rivers under high PAHs stress. Notably, elevated PAHs concentrations significantly impaired energy metabolism and nitrogen metabolic pathways (p < 0.05), suggesting altered nitrogen biogeochemistry under PAHs contamination. This study advances the understanding of microbial population responses to different PAHs contamination levels in coastal regions. (Copyright © 2025 Elsevier Inc. All rights reserved.) |
| Contributed Indexing: | Keywords: Assembly processes; Coastal ecosystems; Ecological risk assessment; Microbial interaction networks; Sediment polycyclic aromatic hydrocarbons |
| Substance Nomenclature: | 0 (Polycyclic Aromatic Hydrocarbons) 0 (Water Pollutants, Chemical) |
| Entry Date(s): | Date Created: 20251024 Date Completed: 20251115 Latest Revision: 20251115 |
| Update Code: | 20251116 |
| DOI: | 10.1016/j.envres.2025.123179 |
| PMID: | 41135729 |
| Databáze: | MEDLINE |
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Nájsť tento článok vo Web of Science | Abstrakt: | Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br />The significant toxicity and carcinogenicity of polycyclic aromatic hydrocarbons (PAHs) have raised increasing concern about their contamination, particularly in coastal regions with intensive human activities and urbanization. However, limited information exists on microbial response mechanisms across varying levels of PAHs contamination. In this study, sediment samples at 18 locations along the Yantai inland river and estuary were collected in October 2024 to examine the partitioning and spatial dispersal of PAHs, while microbial community assembly, interaction networks, and metabolic adaptations were analysed using metagenomics. Results showed that the average ∑PAHs concentration in the estuary (27.95 ± 2.91 ng/g) was significantly lower than that in the river (77.54 ± 43.39 ng/g), with a correspondingly higher ecological risk in the river. High-molecular-weight (HMW) PAHs dominated in both estuary and river sediments due to their high hydrophobicity and stability. Microbial community analysis revealed increased microbial diversity and a higher abundance of PAHs-degrading microbes (e.g., Ruegeria, known for degrading low-molecular-weight PAHs) under higher PAHs contamination. Co-occurrence network and topological analyses demonstrated dual regulatory effects of PAHs stress on microbial interactions, where elevated PAHs contamination intensified interspecies connectivity while simultaneously inducing destabilizing negative covariance patterns that weakened microbial network integrity. Additionally, neutral community model analysis indicated that stochastic processes dominated community assembly, with higher proportions of stochasticity observed in rivers under high PAHs stress. Notably, elevated PAHs concentrations significantly impaired energy metabolism and nitrogen metabolic pathways (p < 0.05), suggesting altered nitrogen biogeochemistry under PAHs contamination. This study advances the understanding of microbial population responses to different PAHs contamination levels in coastal regions.<br /> (Copyright © 2025 Elsevier Inc. All rights reserved.) |
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| ISSN: | 1096-0953 |
| DOI: | 10.1016/j.envres.2025.123179 |