Spatial distribution of floating marine debris in offshore continental Portuguese waters

Marine Pollution Bulletin
Sara SáJosé Vingada

Abstract

This study presents data on abundance and density of macro-floating marine debris (FMD), including their composition, spatial distribution and potential sources off continental Portugal. FMD were assessed by shipboard visual surveys covering ±252,833 km(2) until the 220 nm limit. The FMD average density was 2.98 items/km(2) and abundance amounted to 752,740 items. Unidentified plastics constitute the major bulk of FMD (density=0.46 items/km(2); abundance=117,390 items), followed by styrofoam, derelict or lost materials from fisheries, paper/cardboard and wood material. The North sector of the area presents higher FMD diversity and abundances, probably as a result of the high number of navigation corridors and fisheries operating in that sector. Most FMD originate from local sources, namely discharges from vessels and derelict material from fisheries. Considering the identifiable items, cables and fishing lines were the only fishing related items among the top ten FMD items in Portuguese offshore waters.

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Citations

Sep 9, 2020·Environmental Science and Pollution Research International·Bianca UngerUrsula Siebert
Dec 24, 2018·The Science of the Total Environment·A TejeraP Martel
Sep 9, 2020·Marine Pollution Bulletin·Ana Virginia FilgueirasJesús Gago
May 4, 2021·Marine Pollution Bulletin·C AhrendtI A Hinojosa
Jun 15, 2021·Marine Pollution Bulletin·Sara SáCatarina Eira
May 26, 2020·Ecotoxicology and Environmental Safety·Joana C PrataTeresa Rocha-Santos

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