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| Main Authors: | , , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine pollution bulletin
2026
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| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42263647/ |
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Table of Contents:
- Seagrass ecosystems as potential reservoirs of antibiotic and metal resistance genes in the Yellow River Delta, China. Sun, Yanyu Huang, Yanyan Liu, Qing Liu, Chen Hu, Xiaoke Resistance genes are emerging contaminants in the environment and have gained global attention. Seagrass beds, as important components of coastal blue carbon systems, play a crucial role in filtering coastal waters. However, little is known about the potential of seagrass beds to serve as reservoirs of antibiotic and metal resistance genes. This study investigated the spatial and seasonal distribution of antibiotic resistance genes (ARGs), metal resistance genes (MRGs) and virulence factors (VFs) in the sediment of Zostera japonica beds in the Yellow River Delta, China. The results showed that the most prevalent types of ARGs were those associated with efflux pumps (35.63%), followed by fluoroquinolone (19.88%), lipopeptide (9.13%), rifampin (8.80%), and isoniazid (7.62%). The MRGs primarily included iron complex outer membrane receptor protein, peptide/nickel transport system and Cu+-exporting ATPase. Gammaproteobacteria, Rhodobacteraceae, and Desulfobacteraceae were identified as the major bacterial hosts of ARGs and MRGs. The average gene abundance of ARGs, MRGs, VFs and pathogens all showed the same pattern: vegetated area > unvegetated area and summer > autumn > winter > spring. Co-occurrence networks among ARGs-MRGs and pathogens-VFs demonstrated that the vegetated areas exhibited a higher number of nodes and edges, as well as greater mean degree, clustering coefficient, and network density compared to the non-vegetated areas. This work provides a basis for further research on the prevalence and risk assessment of resistance genes in seagrass bed ecosystems, and contributes to our understanding of the ecological function of seagrass in water purification processes.