Thibault Margot, Hoarau Ludovic, Lebreton Laurent, Le Corre Matthieu, Barret Mathieu, Cordier Emmanuel, Ciccione Stéphane, Royer Sarah-Jeanne, Ter Halle Alexandra, Ramanampamonjy Aina, Jean Claire, Dalleau Mayeul
UMR ENTROPIE, University of Reunion Island, 15 Avenue René Cassin, BP 7151, 97715, Saint Denis, Reunion Island, France; Centre d'Étude et Découverte de Tortues Marine (CEDTM), Saint-Leu, Reunion Island, France; The Ocean Cleanup, Rotterdam, the Netherlands; Kelonia, The Marine Turtle Observatory of Reunion Island, 46 rue du Gal de Gaulle, Saint-Leu, Reunion Island, France; CNRS, Université Toulouse III, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR 5623 Toulouse, France.
UMR ENTROPIE, University of Reunion Island, 15 Avenue René Cassin, BP 7151, 97715, Saint Denis, Reunion Island, France; Centre d'Étude et Découverte de Tortues Marine (CEDTM), Saint-Leu, Reunion Island, France.
Mar Pollut Bull. 2023 Sep;194(Pt A):115343. doi: 10.1016/j.marpolbul.2023.115343. Epub 2023 Jul 31.
We analyzed plastic debris ingested by loggerheads from bycatch between 2007 and 2021 in the Southwest Indian Ocean (SWIO). We also analyzed plastic debris accumulated on beaches of the east coast of Madagascar as a proxy for ocean plastics to compare the characteristics of beached plastics and plastic ingested by turtles. We conducted a "brand audit" of the plastics to determine their country of origin. An oceanic circulation model was used to identify the most likely sources of plastics in the SWIO. In total, 202 of the 266 loggerheads analyzed had ingested plastics. Plastics categorized as "hard" and "white" were equally dominant in loggerheads and on beaches, suggesting no diet selectivity. Both the brand audit and circulation modeling demonstrated that Southeast Asia is the main source of plastic pollution in the region. This study demonstrates that loggerheads can be used as bioindicators of plastic pollution in the SWIO.
我们分析了2007年至2021年期间在西南印度洋（SWIO）误捕的蠵龟所摄入的塑料碎片。我们还分析了马达加斯加东海岸海滩上积累的塑料碎片，以此作为海洋塑料的代表，来比较搁浅塑料和海龟摄入塑料的特征。我们对这些塑料进行了“品牌审计”，以确定其原产国。利用海洋环流模型来确定西南印度洋最有可能的塑料来源。在总共分析的266只蠵龟中，有202只摄入了塑料。在蠵龟和海滩上，被归类为“硬”和“白色”的塑料同样占主导地位，这表明没有饮食选择性。品牌审计和环流模型均表明，东南亚是该地区塑料污染的主要来源。这项研究表明，蠵龟可作为西南印度洋塑料污染的生物指标。
