MG44C:
Trawling-Induced Sedimentary Processes in Continental Shelf and Slope Environments Posters


Session ID#: 27627

Session Description:
Bottom trawling is a nonselective commercial fishing practice whereby heavy nets and gear are dragged along the seafloor. The role of trawling activities in present-day sediment dynamics may be under appreciated. The direct and indirect impacts of this fishing technique on continental margins can modify the physical properties of surface sediments and alter sediment fluxes and budgets. Fishing gear produces not only the scraping and ploughing of the seabed or the crushing of biogenic structures and small-scale bottom relief, but also the resuspension of sediment with an associated significant increase in near-bottom turbidity that can propagate away from fishing grounds by ambient currents and/or sediment-gravity flows. The chronic impact of trawling alters surface sediment properties, texture and composition, modifies chemical exchanges across the water-sediment interface, causes changes of erosion/accumulation rates and produces shifts of benthic communities, including “ecosystem engineers”, which in turn influence the physical properties of the surface sediments. The sum of these human-induced perturbations of the seafloor results in measurable alterations of the seabed integrity and submarine geomorphology from micro-reliefs to regional spatial scales. We welcome submissions that address trawling-induced sedimentary processes or any other anthropogenic activity (e.g. dredging, deep-sea mining) causing similar impacts on the seabed.
Primary Chair:  Pere Puig, ICM-CSIC, Barcelona, Spain
Co-chairs:  Ferdinand J Oberle, USGS, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States and Jacobo Martin, Centro Austral de Investigaciones Científicas (CADIC-CONICET), Ushuaia, Argentina
Moderators:  Ferdinand J Oberle, USGS, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States, Pere Puig, ICM-CSIC, Barcelona, Spain and Jacobo Martin, Inst Ciencies Mar CSIC, Barcelona, Spain
Student Paper Review Liaison:  Pere Puig, ICM-CSIC, Barcelona, Spain
Index Terms:

3002 Continental shelf and slope processes [MARINE GEOLOGY AND GEOPHYSICS]
3022 Marine sediments: processes and transport [MARINE GEOLOGY AND GEOPHYSICS]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
4558 Sediment transport [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • F - Fisheries
  • ME - Marine Ecosystems
  • PO - Physical Oceanography: Other

Abstracts Submitted to this Session:

Claudio Lo Iacono, National Oceanography Center, Southampton, United Kingdom, Pere Puig, ICM-CSIC, Barcelona, Spain, Sarah Paradis, Autonomous University of Barcelona (UAB), Departament de Física and Institut de Ciència i Tecnologia Ambientals, Barcelona, Spain, Antonio Pusceddu, Università degli Studi di Cagliari, Dipartimento di Scienze della Vita e dell’Ambiente,, Cagliari, Italy, Tommaso Russo, Laboratory of Experimental Ecology and Aquaculture, Department of Biology, University of Rome Tor Vergata, Italy, Pere Masque, Autonomous University of Barcelona (UAB), Barcelona, Spain; Edith Cowan University, School of Natural Sciences & Centre for Marine Ecosystems Research, Perth, Australia and ISLAND Cruise Team
Clare Bradshaw1, Ingrid Tjensvoll1, Mattias Sköld2, Ian Allan3, Hans Nilsson2 and Kristoffer Naes3, (1)Stockholm University, Stockholm, Sweden, (2)SLU Aqua, Sweden, (3)Norwegian Institute for Water Research, Oslo, Norway
Sarah Paradis1, Pere Puig2, Anna Sanchez-Vidal3, Pere Masque1,4, Jordi Garcia-Orellana5, Antonio M Calafat-Frau3 and Miquel Canals3, (1)Autonomous University of Barcelona (UAB), Departament de Física and Institut de Ciència i Tecnologia Ambientals, Barcelona, Spain, (2)ICM-CSIC, Barcelona, Spain, (3)Universitat de Barcelona, GRC Geociències Marines, Departament de Dinàmica de la Terra i de l’Oceà, Barcelona, Spain, (4)School of Science, Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, Australia, (5)Universitat Autònoma de Barcelona, Departament de Física and Institut de Ciència i Tecnologia Ambientals, Barcelona, Spain
Marta Arjona, Pere Puig, Mikhail V Emelianov and Albert Palanques, ICM-CSIC, Barcelona, Spain
Ruth Durán1, Pere Puig1, Araceli Muñoz2, Claudio Lo Iacono3, Jorge Guillén1 and Albert Palanques1, (1)ICM-CSIC, Barcelona, Spain, (2)Tragsa-SGP, Madrid, Spain, (3)National Oceanography Centre (NOC), Marine Geoscience, Southampton, United Kingdom
Antonio Pusceddu1, Sarah Paradis2, Pere Masque3, Pere Puig4, Davide Moccia5, Alessandro Cau5, Tommaso Russo6, Claudio Lo Iacono4 and ISLAND Cruise Team, (1)Università degli Studi di Cagliari, Dipartimento di Scienze della Vita e dell’Ambiente,, Cagliari, Italy, (2)Universitat Autònoma de Barcelona, Spain, Departament de Física and Institut de Ciència i Tecnologia Ambientals,, Bellaterra, 08193,, Spain, (3)Autonomous University of Barcelona (UAB), Departament de Física and Institut de Ciència i Tecnologia Ambientals, Barcelona, Spain, (4)ICM-CSIC, Barcelona, Spain, (5)Università degli Studi di Cagliari, Dipartimento di Scienze della Vita e dell'Ambiente, Cagliari, Italy, (6)Laboratory of Experimental Ecology and Aquaculture, Department of Biology, University of Rome Tor Vergata, Italy
Ingrid Tjensvoll1, Mattias Sköld2, Anette Jönsson3 and Clare Bradshaw1, (1)Stockholm University, Stockholm, Sweden, (2)SLU Aqua, Sweden, (3)Swedish Meteorological and Hydrological Institute, Norrköping, Sweden
Albert Palanques1, Pere Puig1 and Marta Arjona2, (1)ICM-CSIC, Barcelona, Spain, (2)Institut de Ciències del Mar (CSIC), Marine Geosciences, Barcelona, Spain