Abstract：
The increasing threats to ecosystems and humans from marine plastic pollution require a comprehensive assessment. We present a plastisphere case study from Reunion Island, a remote oceanic island located in the Southwest Indian Ocean, polluted by plastics. We characterized the plastic pollution on the island\'s coastal waters, described the associated microbiome, explored viable bacterial flora and the presence of antimicrobial resistant (AMR) bacteria. Reunion Island faces plastic pollution with up to 10,000 items/km2 in coastal water. These plastics host microbiomes dominated by Proteobacteria (80 %), including dominant genera such as Psychrobacter, Photobacterium, Pseudoalteromonas and Vibrio. Culturable microbiomes reach 107 CFU/g of microplastics, with dominance of Exiguobacterium and Pseudomonas. Plastics also carry AMR bacteria including β-lactam resistance. Thus, Southwest Indian Ocean islands are facing serious plastic pollution. This pollution requires vigilant monitoring as it harbors a plastisphere including AMR, that threatens pristine ecosystems and potentially human health through the marine food chain.
摘要：
海洋塑料污染对生态系统和人类日益增长的威胁需要进行全面评估。我们提出了一个来自留尼汪岛的塑料球案例研究，位于西南印度洋的一个偏远的海洋岛屿，被塑料污染。我们描述了岛上沿海水域的塑料污染，描述了相关的微生物组，探索了可行的细菌菌群和抗微生物耐药(AMR)细菌的存在。留尼汪岛面临塑料污染，沿海水域中的塑料污染高达10,000件/平方公里。这些塑料宿主微生物以变形杆菌为主（80％），包括显性属如嗜冷杆菌属，光细菌,假交替单胞菌和弧菌。可培养的微生物组达到107CFU/g的微塑料，以原细菌和假单胞菌为主。塑料还携带AMR细菌,包括β-内酰胺抗性。因此，西南印度洋岛屿正面临严重的塑料污染。这种污染需要警惕监测，因为它含有包括AMR在内的塑料圈，通过海洋食物链威胁原始生态系统和潜在的人类健康。
