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Environmental Sources
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Plastic debris (> 500µm) concentration gradient detected across the Southwest Indian Ocean
2024
Score: 35
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Sarah‐Jeanne Royer,
Sarah‐Jeanne Royer,
Sarah‐Jeanne Royer,
Sarah‐Jeanne Royer,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Philippe Jourand,
Philippe Jourand,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Alexandra ter Halle
Matthias Egger,
Margot Thibault,
Margot Thibault,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Matthias Egger,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Adrian Fajeau,
Adrian Fajeau,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthias Egger,
Matthieu Le Corre,
Adrian Fajeau,
Adrian Fajeau,
Matthieu Le Corre,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Aina Ramanampananjy,
Laurent Lebreton,
Laurent Lebreton,
Aina Ramanampananjy,
Laurent Lebreton,
Alexandra ter Halle
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Aina Ramanampananjy,
Matthias Egger,
Sarah‐Jeanne Royer,
Aina Ramanampananjy,
Sarah‐Jeanne Royer,
Laurent Lebreton,
Laurent Lebreton,
Matthias Egger,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Laurent Lebreton,
Alexandra ter Halle
Sarah‐Jeanne Royer,
Alexandra ter Halle
Matthias Egger,
Laurent Lebreton,
Matthias Egger,
Alexandra ter Halle
Laurent Lebreton,
Laurent Lebreton,
Alexandra ter Halle
Alexandra ter Halle
Gwennaïs Fustemberg,
Gwennaïs Fustemberg,
Alexandra ter Halle
Gwennaïs Fustemberg,
Gwennaïs Fustemberg,
Laurent Lebreton,
Matthias Egger,
Sarah‐Jeanne Royer,
Laurent Lebreton,
Laurent Lebreton,
Laurent Lebreton,
Alexandra ter Halle
Alexandra ter Halle
Vyctoria Marillac,
Vyctoria Marillac,
Laurent Lebreton,
Vyctoria Marillac,
Laurent Lebreton,
Laurent Lebreton,
Margot Thibault,
Alexandra ter Halle
Vyctoria Marillac,
Alexandra ter Halle
Margot Thibault,
Alexandra ter Halle
Alexandra ter Halle
Julie Gindrey,
Alexandra ter Halle
Alexandra ter Halle
Laurent Lebreton,
Julie Gindrey,
Julie Gindrey,
Matthias Egger,
Matthias Egger,
Julie Gindrey,
Anjara Saloma,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Anjara Saloma,
Alexandra ter Halle
Anjara Saloma,
Laurent Lebreton,
Alexandra ter Halle
Alexandra ter Halle
Anjara Saloma,
Alexandra ter Halle
Alexandra ter Halle
Manon Condet,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Laurent Lebreton,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Manon Condet,
Manon Condet,
Laurent Lebreton,
Manon Condet,
Alexandra ter Halle
Alexandra ter Halle
Laurent Lebreton,
Perrine Mangion,
Laurent Lebreton,
Alexandra ter Halle
Perrine Mangion,
Laurent Lebreton,
Perrine Mangion,
Perrine Mangion,
Laurent Lebreton,
Matthias Egger,
Alexandra ter Halle
Philippe Jourand,
Philippe Jourand,
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Alexandra ter Halle
Matthias Egger,
Laurent Lebreton,
Matthias Egger,
Maxime Amy,
Maxime Amy,
Alexandra ter Halle
Alexandra ter Halle
Maxime Amy,
Maxime Amy,
Sébastien Jaquemet,
Laurent Lebreton,
Sébastien Jaquemet,
Philippe Jourand,
Philippe Jourand,
Alexandra ter Halle
Laurent Lebreton,
Thierry Mulochau,
Matthieu Le Corre,
Philippe Jourand,
Sarah‐Jeanne Royer,
Laurent Lebreton,
Alexandra ter Halle
Philippe Jourand,
Matthieu Le Corre,
Alexandra ter Halle
Thierry Mulochau,
Laurent Lebreton,
Laurent Lebreton,
Matthieu Le Corre,
Matthieu Le Corre,
Matthias Egger,
Alexandra ter Halle
Laurent Lebreton,
Alexandra ter Halle
Summary
Researchers investigated plastic debris concentration and composition across the Southwest Indian Ocean using 19 oceanographic campaigns and 153 uninhabited beach surveys, identifying a gradient in floating macroplastic distribution and characterizing the sources and polymer types of 101,055 litter items.
<title>Abstract</title> Marine plastic pollution is increasing. The Indian Ocean is understudied compared to the Pacific and Atlantic Oceans. This study investigates plastic pollution in the Southwest Indian Ocean using a multi-faceted approach that includes both floating (visual survey and manta trawls) and beach-collected plastics, assessing their concentration, composition, and origin. Through 19 oceanographic campaigns and 153 uninhabited beach surveys, a total of 101,055 pieces of marine litter were identified, with 95% being plastics. Floating macroplastics were predominantly found near remote island waters, particularly at Glorieuses (10<sup>3</sup> items.km<sup>-2</sup>). Meanwhile, an increasing gradient of floating microplastic concentrations was observed from 40°E (10<sup>3</sup> items.km<sup>-2</sup>) to 65°E (10<sup>5</sup> items.km<sup>-2</sup>) along 30°/33°S. High concentration of beached macroplastics where observed on the east coast of Madagascar and Tromelin. Mesoplastics were more abundant than macroplastics, on remote islands. Floating and beached plastic debris were mainly hard fragments, mostly made of polyethylene (floating, beached: 72%, 57%) or polypropylene (26%, 34%). The majority of macroplastics identified in the brand audit, was mainly mineral water food packaging (81%) from Southeast Asian manufacturers. Our results will inform national management and provide evidence to support international plastic treaty negotiations on legacy plastics.