Cook dinner’s petrel, a susceptible species, had one of many highest plastic publicity threat scores within the examine
Paul Donald
Threatened seabirds are spending days and generally weeks foraging for meals round floating rubbish patches within the ocean, based on a significant examine that warns worldwide motion to sort out plastic air pollution is urgently wanted.
The analysis used monitoring knowledge from greater than 7000 birds, mixed with plastic air pollution location knowledge, to map the plastic publicity threat of 77 species of petrel, a bunch of migratory seabirds.
It discovered that 25 per cent of all plastic publicity for seabirds happens outdoors nationwide jurisdictions, primarily at large floating patches of air pollution such because the Nice Pacific Rubbish Patch.
Birds can spend wherever from hours to weeks foraging for meals in these air pollution hotspots, says group member Bethany Clark on the charity BirdLife Worldwide.
“Through the breeding season, they spend much less time [at pollution hotspots] as a result of they should get again to feed their chicks. However that may nonetheless be many hours, after which within the non-breeding season, they’ll spend weeks,” she says.
Earlier research have discovered that plastic can get caught up in seabirds’ stomachs, inflicting obstructions and poisoning. Petrels have additionally been proven to regurgitate plastic air pollution to feed to their chicks.
Worryingly, a few of the most threatened birds, comparable to shearwaters and Hawaiian petrels, are among the many species with essentially the most publicity to ocean plastic.
“It’s regarding for us that a few of these actually threatened species are additionally affected by having to feed in areas with a lot of plastic,” says Clark.
On condition that a big proportion of plastic publicity takes place past nationwide jurisdictions, Clark is asking for international locations to work collectively on international options to sort out the sources of air pollution.
Cracking down on plastic waste from fishing vessels and lowering the usage of single-use plastics can be efficient first steps, she says.
Nations are additionally working beneath the United Nations course of to attract up a worldwide, legally binding treaty to curb plastic air pollution, which might come into power from 2025.
The examine solely thought of the publicity threat skilled by the birds, somewhat than assessing how a lot plastic was truly ingested by totally different populations and species.
That’s an space for future analysis, says group member Lizzie Pearmain on the College of Cambridge. “For future research, if we discover that two totally different populations have roughly plastic ingestion than anticipated simply from the spatial overlap, then we will begin to perceive whether or not they’re actively avoiding it, or extra prone to ingest it,” she says.
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