Posted by: Sandy Steinman | December 26, 2025

Lethal dose of plastic for seabirds and marine animals ‘much smaller than expected’

Monga Bay reported

  • A new study looking at the impacts of plastic ingestion by seabird, sea turtles and marine mammals found that relatively small amounts of consumed plastic can be deadly.
  • The research analyzed the necropsy results for more than 10,000 animals and quantified the amount of plastic that could prove deadly as well as the types of plastic with the biggest impact, which included synthetic rubber, soft plastics (such as plastic bags and wrappers) and discarded plastic fishing gear.
  • Overall, one in five of the deceased animals had consumed plastic (affecting 50% of all studied sea turtles, 35% of seabirds and 12% of marine mammals); nearly half of the species studied were considered threatened or near threatened on the IUCN Red List.
  • The researchers didn’t consider other health impacts of plastic, such as chemical exposure and entanglement, which led the lead author to conclude the study likely underestimates the “existential threat that plastic pollution poses to ocean wildlife.”

Read on news.mongabay.com/2025/11/lethal-dose-of-plastic-for-seabirds-and-marine-animals-much-smaller-than-expected/


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