Biogeosciences
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Articles | Volume 23, issue 7
Articles | Volume 23, issue 7
https://doi.org/10.5194/bg-23-2389-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-2389-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 7
Research article
 | 
13 Apr 2026
Research article |  | 13 Apr 2026

River flooding reshapes sediments, contaminants and benthic microbial communities in a Mediterranean coastal system

Claudio Pellegrini, Marco Basili, Irene Sammartino, Tommaso Tesi, Emanuela Frapiccini, Grazia Marina Quero, Sarah Pizzini, Roberta Zangrando, Gian Marco Luna, Sara Catena, Bruno Campo, Naomi Massaccesi, Fabio Trincardi, Andrea Gallerani, and Jacopo Chiggiato

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Short summary
The September 2022 flood in central Italy left a short-lived yet significant imprint offshore, with patchy sediment deposition, pollutant hotspots (Polycyclic Aromatic Hydrocarbons (PAHs), Poly- and Perfluorinated alkyl substances (PFASs)) and shifts in benthic microbial communities. These findings reveal how extreme events, though transient, can reshape coastal systems, stressing the need for event-based monitoring and improved understanding of flood-driven sediment, contaminant, and ecosystem dynamics.
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