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Rapid increase in Asian bottles in the South Atlantic Ocean indicates major debris inputs from ships

2019; National Academy of Sciences; Volume: 116; Issue: 42 Linguagem: Inglês

10.1073/pnas.1909816116

1091-6490

Peter G. Ryan, Ben J. Dilley, Robert A. Ronconi, Maëlle Connan,

Marine and Offshore Engineering Studies

Significance Many oceanic islands suffer high levels of stranded debris, particularly those near subtropical gyres where floating debris accumulates. During the last 3 decades, plastic drink bottles have shown the fastest growth rate of all debris types on remote Inaccessible Island. During the 1980s, most bottles drifted to the island from South America, carried 3,000 km by the west wind drift. Currently, 75% of bottles are from Asia, with most from China. The recent manufacture dates indicate that few bottles could have drifted from Asia, and presumably are dumped from ships, in contravention of International Convention for the Prevention of Pollution from Ships regulations. Our results question the widely held assumption that most plastic debris at sea comes from land-based sources.