Articles | Volume 16, issue 8
https://doi.org/10.5194/essd-16-3547-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-16-3547-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description paper
| 
07 Aug 2024
Data description paper |
| 07 Aug 2024
| 07 Aug 2024
Demersal fishery Impacts on Sedimentary Organic Matter (DISOM): a global harmonized database of studies assessing the impacts of demersal fisheries on sediment biogeochemistry
Geological Institute, ETH Zürich, Zurich, Switzerland
Justin Tiano
Wageningen Marine Research, Wageningen University and Research, P.O. Box 68, 1970 AB, IJmuiden, the Netherlands
Emil De Borger
Royal Netherlands Institute for Sea Research (NIOZ), Department of Estuarine and Delta Systems, P.O. Box 140, 4400 AC, Yerseke, the Netherlands
Department of Biology, Marine Biology Research group, Ghent University, Krijgslaan 281/S8, 9000 Ghent, Belgium
Antonio Pusceddu
Department of Life and Environmental Sciences, University of Cagliari, Via T. Fiorelli, 1, 09126 Cagliari, Italy
Clare Bradshaw
Department of Environment, Ecology and Plant Sciences, Stockholm University, 10691 Stockholm, Sweden
Claudia Ennas
Department of Life and Environmental Sciences, University of Cagliari, Via T. Fiorelli, 1, 09126 Cagliari, Italy
Claudia Morys
Department of Environment, Ecology and Plant Sciences, Stockholm University, 10691 Stockholm, Sweden
Marija Sciberras
The Lyell Centre, Heriot-Watt University, Edinburgh, EH14 4AP, UK
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This study gives an assessment of bottom trawling on physical, chemical, and biological characteristics in a location known for its strong currents and variable habitats. Although trawl gears only removed the top 1 cm of the seabed surface, impacts on reef-building tubeworms significantly decreased carbon and nutrient cycling. Lighter trawls slightly reduced the impact on fauna and nutrients. Tubeworms were strongly linked to biogeochemical and faunal aspects before but not after trawling.
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Bottom trawling alters benthic mineralization: the recycling of organic material (OM) to free nutrients. To better understand how this occurs, trawling events were added to a model of seafloor OM recycling. Results show that bottom trawling reduces OM and free nutrients in sediments through direct removal thereof and of fauna which transport OM to deeper sediment layers protected from fishing. Our results support temporospatial trawl restrictions to allow key sediment functions to recover.
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Short summary
DISOM is a database that compiles data of 71 independent studies that assess the effect of demersal fisheries on sedimentological and biogeochemical properties. This database also provides crucial metadata (i.e. environmental and fishing descriptors) needed to understand the effects of demersal fisheries in a global context.
DISOM is a database that compiles data of 71 independent studies that assess the effect of...
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