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- W3091520011 abstract "• Lagoon sediments had higher ARG pollution levels as compared to pristine sediments. • Heavy metals posed indirect negative effects on the lagoon sediment ARG profiles. • Horizontal gene transfer determined the absolute abundance of sediment ARGs. • Vertical gene transfer affected the composition of sediment ARG communities. • Deterministic and stochastic processes drove sediment ARG community assembly. Rapid urbanization has resulted in pervasive occurrence of antibiotic resistance genes (ARGs) in urban aquatic ecosystems. However, limited information is available concerning the ARG profiles and the forces responsible for their assembly in urban landscape lagoon systems. Here, we employed high-throughput quantitative PCR (HT-qPCR) to characterize the spatial variations of ARGs in surface and core sediments of Yundang Lagoon, China. The results indicated that the average richness and absolute abundance of ARGs were 11 and 53 times higher in the lagoon sediments as compared to pristine reference Tibetan lake sediments, highlighting the role of anthropogenic activities in ARG pollution. Co-occurrence network analysis indicated that various anaerobic prokaryotic genera belonging to Alpha-, Deltaproteobacteria, Bacteroidetes, Euryarchaeota, Firmicutes and Synergistetes were the potential hosts of ARGs. The partial least squares-path modeling (PLS-PM) analysis revealed positive and negative indirect effects of physicochemical factors and heavy metals on the lagoon ARG profiles, via biotic factors, respectively. The horizontal (mediated by mobile genetic elements) and vertical (mediated by prokaryotic communities) gene transfer may directly contribute the most to drive the abundance and composition of ARGs, respectively. Furthermore, the neutral community model demonstrated that the assembly of sediment ARG communities was jointly governed by deterministic and stochastic processes. Overall, this study provides novel insights into the diversity and distribution of ARGs in the benthic habitat of urban lagoon systems and underlying mechanisms for the spread and proliferation of ARGs." @default.
- W3091520011 created "2020-10-08" @default.
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- W3091520011 date "2021-04-01" @default.
- W3091520011 modified "2023-10-17" @default.
- W3091520011 title "Horizontal and vertical gene transfer drive sediment antibiotic resistome in an urban lagoon system" @default.
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- W3091520011 doi "https://doi.org/10.1016/j.jes.2020.09.004" @default.
- W3091520011 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33637236" @default.
- W3091520011 hasPublicationYear "2021" @default.
- W3091520011 type Work @default.