research product . Other ORP type . 2014

Efectes de la pesca d’arrossegament en els sediments dels canyons submarins catalans

Puig, Pere; Canals, Miquel; Company, Joan B.; Martín, Jacobo; Amblas, David; Lastras, G.; Palanques, Albert; Calafat, Antoni;
Open Access
  • Published: 01 Jan 2014
  • Publisher: Museu Comarcal del Maresme
  • Country: Spain
Abstract
Bottom trawling is a nonselective commercial fishing technique whereby heavy nets and gear are pulled along the seafloor, modifying the physical properties of seafloor sediments and altering natural sediment fluxes. Most studies addressing the physical disturbances of trawl gear on the seabed have been undertaken in coastal and shelf environments, where the capacity of trawling to modify the seafloor sediments coexists with high-energy natural processes driving sediment erosion, transport and deposition. Recent studies conducted on the Catalan margin have demonstrated that on continental slopes —where the sediment dynamics is less energetic— the reworking of the deep seafloor by bottom trawling produces periodic resuspension of surface sediments, and ultimately modifies the shape of the submarine landscape over large spatial scales. Trawling-induced sediment displacement and removal from fishing grounds causes the morphology of the deep seafloor to become smoother over time, reducing its original complexity. These results suggest that during the last decades, following the industrialization of fishing fleets, bottom trawling has become an important driver of deep seascape evolution
Les dades presentades en aquest treball es van obtenir en el marc de diversos projectes de recerca: HERMIONE (226354 i CTM2010-11084-E), DOS MARES (CTM2010- 21810-C03), OASIS DEL MAR - Obra Social “la Caixa”, GRACCIE-CONSOLIDER (CSD2007- 00067) i REDECO (CTM2008-04973-E). Agraïm també el suport rebut per part del Govern Català als Grups de Recerca Consolidats (2009 SGR 899 i 1305) i l’ajut i assistència tècnica de les tripulacions dels vaixells oceanogràfics Hespérides, Sarmiento de Gamboa i García del Cid
8 pages, 9 figures
Peer reviewed
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  • European Marine Science Marine Environmental Science : Hotspot ecosystem research and Man's impact on European seas
Funded by
EC| HERMIONE
Project
HERMIONE
Hotspot Ecosystem Research and Man's Impact on European seas
  • Funder: European Commission (EC)
  • Project Code: 226354
  • Funding stream: FP7 | SP1 | ENV
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