Preprints
https://doi.org/10.5194/essd-2023-412
https://doi.org/10.5194/essd-2023-412
18 Dec 2023
 | 18 Dec 2023
Status: this preprint is currently under review for the journal ESSD.

Demersal fishery Impacts on Sedimentary Organic Matter (DISOM): A global harmonized database of studies assessing the impacts of demersal fisheries on sediment biogeochemistry

Sarah Paradis, Justin Tiano, Emil De Borger, Antonio Pusceddu, Clare Bradshaw, Claudia Ennas, Claudia Morys, and Marija Sciberras

Abstract. Marine sediments are one of the largest carbon reservoirs on the planet and play a key role in the global cycling of organic matter. Bottom fisheries constitute the most widespread anthropogenic physical disturbance to seabed habitats, and this has prompted NGOs and governments to act on regulating mobile bottom contacting fishing gear. However, the scientific evidence of the effects of bottom trawling on sediment biogeochemistry are highly diverse and present contrasting results. Here we present a global harmonized dataset of 71 independent studies that assess the effects of demersal fisheries on sedimentological (i.e. grain size, porosity) and biogeochemical (i.e. organic carbon, phytopigments, nutrient fluxes) properties: Demersal fishery Impacts on Sedimentary Organic Matter (DISOM) database (Paradis, 2023; https://doi.org/10.3929/ethz-b-000634336). We establish protocols to report metadata that will allow a better comparison of the results in order to improve our understanding of the effects of bottom trawling on the seafloor on a global scale. With this harmonized database, we aim to allow researchers to explore the effects of demersal fisheries in variable environmental settings to deconvolve the effects of this disturbance and provide efficient management strategies.

Sarah Paradis, Justin Tiano, Emil De Borger, Antonio Pusceddu, Clare Bradshaw, Claudia Ennas, Claudia Morys, and Marija Sciberras

Status: open (extended)

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  • RC1: 'Comment on essd-2023-412', Anonymous Referee #1, 15 Feb 2024 reply
Sarah Paradis, Justin Tiano, Emil De Borger, Antonio Pusceddu, Clare Bradshaw, Claudia Ennas, Claudia Morys, and Marija Sciberras
Sarah Paradis, Justin Tiano, Emil De Borger, Antonio Pusceddu, Clare Bradshaw, Claudia Ennas, Claudia Morys, and Marija Sciberras

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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 on a global context.
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