Bottom trawling in submarine canyons can affect their sedimentary dynamics, but studies addressing this topic are still scarce. In the Gulf of Palermo (NW Sicily, SW Mediterranean Sea), bottom trawling occurs on the continental slope, but principally concentrates within Oreto Canyon. Hydrographic profiles and time series data of temperature, turbidity, and currents obtained by a CTD probe and by moored instruments, respectively, revealed increased turbidity values and the presence of bottom and intermediate nepheloid layers coinciding with periods of bottom trawling activity. The delay between the onset of trawling activities along the Oreto canyon axis and the increase in water turbidity at the mooring location indicate that trawling resuspended particles are progressively advected down-canyon by hydrodynamic processes. Topographic waves and near-inertial currents seem to contribute to the sediment transport of resuspended particles as bottom and intermediate nepheloid layers. Results presented in this paper highlight the complex relationship between hydrodynamic processes and sediment resuspension by trawling in submarine canyons.

Arjona-Camas, M., Lo Iacono, C., Puig, P., Russo, T., Palanques, A. (2024). Trawling-Induced Sedimentary Dynamics in Submarine Canyons of the Gulf of Palermo (SW Mediterranean Sea). JOURNAL OF MARINE SCIENCE AND ENGINEERING, 12(7) [10.3390/jmse12071050].

Trawling-Induced Sedimentary Dynamics in Submarine Canyons of the Gulf of Palermo (SW Mediterranean Sea)

Tommaso Russo;
2024-01-01

Abstract

Bottom trawling in submarine canyons can affect their sedimentary dynamics, but studies addressing this topic are still scarce. In the Gulf of Palermo (NW Sicily, SW Mediterranean Sea), bottom trawling occurs on the continental slope, but principally concentrates within Oreto Canyon. Hydrographic profiles and time series data of temperature, turbidity, and currents obtained by a CTD probe and by moored instruments, respectively, revealed increased turbidity values and the presence of bottom and intermediate nepheloid layers coinciding with periods of bottom trawling activity. The delay between the onset of trawling activities along the Oreto canyon axis and the increase in water turbidity at the mooring location indicate that trawling resuspended particles are progressively advected down-canyon by hydrodynamic processes. Topographic waves and near-inertial currents seem to contribute to the sediment transport of resuspended particles as bottom and intermediate nepheloid layers. Results presented in this paper highlight the complex relationship between hydrodynamic processes and sediment resuspension by trawling in submarine canyons.
2024
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIOS-05/A - Ecologia
English
Con Impact Factor ISI
submarine canyons
bottom trawling
turbidity
nepheloid layers
hydrodynamics
Mediterranean Sea
Arjona-Camas, M., Lo Iacono, C., Puig, P., Russo, T., Palanques, A. (2024). Trawling-Induced Sedimentary Dynamics in Submarine Canyons of the Gulf of Palermo (SW Mediterranean Sea). JOURNAL OF MARINE SCIENCE AND ENGINEERING, 12(7) [10.3390/jmse12071050].
Arjona-Camas, M; Lo Iacono, C; Puig, P; Russo, T; Palanques, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/390649
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