Seafloor litter - Density per trawl normalized per km² 2011/2022 v2023 ... : sl_totalabundance ...

This visualization product displays the density of seafloor litter per trawl. EMODnet Chemistry included the collection of marine litter in its 3rd phase. Since the beginning of 2018, data of seafloor litter collected by international fish-trawl surveys have been gathered and processed in the EMODne...

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Bibliographic Details
Main Author: Ifremer, VIGIES Information Valuation Service for Integrated Management and MonitoringIFREMER, SISMER, Scientific Information Systems for the SEA
Format: Dataset
Language:unknown
Published: Ifremer, VIGIES (Information Valuation Service for Integrated Management and Monitoring)IFREMER, SISMER, Scientific Information Systems for the SEA 2023
Subjects:
/Human Activities/Pollution
Oceanographic geographical features
Litter abundance and type
Sea-floor litter abundance
Northeast Atlantic Ocean 40W
North Sea
Baltic Sea
Mediterranean Sea
Arctic Ocean
Black Sea
EMODnet Chemistry
sediment
Marine litter
Data
Celtic Seas
WP4 Benthic Mapping
/Environment/Pollution
Spatial data products
Arctic
Northeast Atlantic
Online Access:https://dx.doi.org/10.13120/e4e48635-6baf-4c94-8325-3f975ff986dd
https://sextant.ifremer.fr/documentation/emodnet_chemistry/api/catalogue.html#/metadata/e4e48635-6baf-4c94-8325-3f975ff986dd
Description
Summary:This visualization product displays the density of seafloor litter per trawl. EMODnet Chemistry included the collection of marine litter in its 3rd phase. Since the beginning of 2018, data of seafloor litter collected by international fish-trawl surveys have been gathered and processed in the EMODnet Chemistry Marine Litter Database (MLDB). The harmonization of all the data has been the most challenging task considering the heterogeneity of the data sources, sampling protocols (OSPAR and MEDITS protocols) and reference lists used on a European scale. Moreover, within the same protocol, different gear types are deployed during fishing bottom trawl surveys. In cases where the wingspread and/or number of items were unknown, data could not be used because these fields are needed to calculate the density. Data collected before 2011 are affected by this filter. When the distance reported in the data was null, it was calculated from: - the ground speed and the haul duration using this formula: Distance (km) = Haul ...

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