‘What we saw inside some caves was shocking’
Scientists have uncovered “alarming levels” of plastic and other man-made debris deep inside sea caves in the Mediterranean.
What’s going on?
A group of researchers conducted a comprehensive study of marine debris found in coastal caves on the island of Cyprus.
“In every cave examined, we found abundant debris, some with up to 97 items per square metre, well above levels typically found on open beaches, at the sea surface or on the sea floor,” two of the authors said. Phys.org article summarizing new publications to work.
They explained that sea caves act as “natural traps” that silently accumulate marine debris.
“What we saw in some caves was shocking,” they added.
Why is this important?
This study helps fill a significant gap in understanding the extent of plastic pollution in the oceans. Sea caves are often overlooked in marine litter surveys, but these areas serve as safe havens for many species, the authors noted. For example, many of the caves the team examined are known resting and breeding grounds for the Mediterranean monk seal, which they describe as “one of the world’s most endangered marine mammals.”
“Although no seal deaths or serious injuries due to macrolitter have yet been documented in the Mediterranean, recent studies have already confirmed the presence of microplastics in the digestive systems of the species,” they added.
According to WWF Australia, 100,000 marine mammals die every year after ingesting or becoming entangled in ocean plastics.
Meanwhile, scientists are investigating the effects of microplastics (tiny pieces that break away from larger plastics as they decompose) on human health. These fragments have been discovered in water, food, soil and air, and have so far been linked to major health problems such as reduced blood flow to the brain and lung cancer.
What is being done against plastic pollution?
One thing we can all do against the plastic plague is use less. For example, instead of relying on pre-packaged bottled water that comes in single-use plastic containers, consider purchasing a sturdy, reusable cup. Another effective action is to bring your own reusable container for leftovers when you eat out.
Meanwhile, cave research scientists are pushing for more research.
“This is just the beginning and we urgently need broader monitoring across the Mediterranean to understand how widespread the problem really is,” they said.
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