Bottom trawling at Whittard Canyon: Evidence for seabed modification, trawl plumes and food source heterogeneity
نویسندگان
چکیده
منابع مشابه
Global analysis of depletion and recovery of seabed biota after bottom trawling disturbance.
Bottom trawling is the most widespread human activity affecting seabed habitats. Here, we collate all available data for experimental and comparative studies of trawling impacts on whole communities of seabed macroinvertebrates on sedimentary habitats and develop widely applicable methods to estimate depletion and recovery rates of biota after trawling. Depletion of biota and trawl penetration ...
متن کاملImpacts of Bottom Trawling and Litter on the Seabed in Norwegian Waters
Bottom trawling and seabed littering are two serious threats to seabed integrity. We present an overview of the distribution of seabed litter and bottom trawling in Norwegian waters (the Norwegian Sea and the southern Barents Sea). Vessel Monitoring System (VMS) records and trawl marks (TM) on the seabed were used as indicators of pressure and impact of bottom trawling, respectively. Estimates ...
متن کاملImpact of Bottom Trawling on Deep-Sea Sediment Properties along the Flanks of a Submarine Canyon
The offshore displacement of commercial bottom trawling has raised concerns about the impact of this destructive fishing practice on the deep seafloor, which is in general characterized by lower resilience than shallow water regions. This study focuses on the flanks of La Fonera (or Palamós) submarine canyon in the Northwestern Mediterranean, where an intensive bottom trawl fishery has been act...
متن کاملEnvironmental impact of trawling on the seabed: a review
Fishers have been complaining about the effects of bottom trawl gear on the marine environment since at least the 14th century. Trawl gear affects the environment in both direct and indirect ways. Direct effects include scraping and ploughing of the substrate, sediment resuspension, destruction of benthos, and dumping of processing waste. Indirect effects include post-fishing mortality and long...
متن کاملA simplified model for bottom trawl fishing gears
Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing conditions, flat seabed and gear symmetry. Simulations proportionate a number of relevant outcomes like distribution of tensions at the warp, balance of forces at the otterbo...
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ژورنال
عنوان ژورنال: Progress in Oceanography
سال: 2018
ISSN: 0079-6611
DOI: 10.1016/j.pocean.2017.12.010