Acute impacts of bottom trawl gears on benthic metabolism and nutrient cycling
نویسندگان
چکیده
منابع مشابه
A 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...
متن کاملCumulative impacts of seabed trawl disturbance on benthic biomass, production, and species richness in different habitats
Bottom trawling causes widespread disturbance of sediments in shelf seas and can have a negative impact on benthic fauna. We conducted a large-scale assessment of bottom trawl fishing of benthic fauna in different habitats, using a theoretical, size-based model that included habitat features. Species richness was estimated based on a generalized body mass versus species richness relationship. T...
متن کاملBenthic primary production and nutrient cycling in sediments with benthic microalgae and transient accumulation of macroalgae
Annual rates of sediment denitrification and sediment–water fluxes of oxygen and nutrients were quantified at two shallow locations, Virksund and Ulbjerg, in the Limfjorden, Denmark. The sediment was sandy and colonized mainly by bivalves with a wet weight of 2,508 g m22 at Virksund and 572 g m22 at Ulbjerg. A benthic microalgal community was present throughout the year, and for 1–2 months in t...
متن کاملModelling potential impacts of bottom trawl fisheries on soft sediment biogeochemistry in the North Sea†
Bottom trawling causes physical disturbance to sediments particularly in shelf areas. The disturbance due to trawling is most significant in deeper areas with softer sediments where levels of natural disturbance due to wave and tidal action are low. In heavily fished areas, trawls may impact the same area of seabed more than four times per year. A single pass of a beam trawl, the heaviest gear ...
متن کاملAccidental Limit State of Submarine Pipeline: Trawl Gears Pull-Over Loads and Effect of Free Span
Submarine pipelines failures lead to oil spills in water and may even lead to explosions with heavy financial and environmental damages. Trawl gear is one of the main factors in the failure of the submarine pipelines. In this paper, sensitivity analysis is performed on influence of height and span length alternations on the response of pipeline against the traction caused by trawling pull-over ...
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ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 2019
ISSN: 1054-3139,1095-9289
DOI: 10.1093/icesjms/fsz060