Seafloor litter from the continental shelf and canyons in French Mediterranean Water: Distribution, typologies and trends

Type Article
Date 2019-09
Language English
Author(s) Gerigny Olivia1, Brun MelanieORCID2, Fabri Marie-Claire1, Tomasino Corinne1, Le Moigne Morgan2, Jadaud Angelique3, Galgani FrancoisORCID1
Affiliation(s) 1 : Institut Français de Recherche pour l'Exploitation de la MER (Ifremer), Centre Méditerranée, LER/PAC, France
2 : Institut Français de Recherche pour l'Exploitation de la MER (Ifremer), Centre Atlantique, VIGIES, France
3 : MARBEC, Ifremer, Université de Montpellier, CNRS, IRD, Sète, France
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2019-09 , Vol. 146 , P. 653-666
DOI 10.1016/j.marpolbul.2019.07.030
WOS© Times Cited 17
Keyword(s) Marine litter, Seafloor, Canyon, Mediterranean Sea, Gulf of Lion, Corsica
Abstract

Seafloor litter has been studied both on the continental shelves (by trawling during 24 years) and in canyons (by ROV) of the French Mediterranean sea Water (FMW). On the continental shelf, mean densities range from 49.63 to 289.01 items/km2. The most abundant categories were plastic, glass/ceramics, metals and textiles. Trend analysis shows a significant increase in plastic quantities during the study period. Plastics accumulate at all depths, with heavier items being found in deeper areas, while the continental slope-break appears as a clean area. The spatial distribution of litter revealed the influence of geomorphologic factors, anthropic activities, shipping route, river inputs. All the canyons are affected by debris but coastal canyons (Ligurian Sea and Corsica) were more impacted than offshore canyons in the Gulf of Lion. The FMW appears to be highly polluted with regard to values found in other areas, but lower than those observed in the Eastern Mediterranean.

 

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Gerigny Olivia, Brun Melanie, Fabri Marie-Claire, Tomasino Corinne, Le Moigne Morgan, Jadaud Angelique, Galgani Francois (2019). Seafloor litter from the continental shelf and canyons in French Mediterranean Water: Distribution, typologies and trends. Marine Pollution Bulletin, 146, 653-666. Publisher's official version : https://doi.org/10.1016/j.marpolbul.2019.07.030 , Open Access version : https://archimer.ifremer.fr/doc/00507/61868/