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Microplastics, which get gobbled up by whales, deep-sea fish and plankton, have also turned up in the bodies of mosquitoes, scientists have revealed.
The research, published Wednesday in the journal Biology Letters, is the first to show that bits of plastic can be transferred between a mosquito's life stages that use different habitats.
For the study, the scientists fed the larvae of Culex pipiens—the common house mosquito—different-sized fluorescent polystyrene beads. The researchers found that the tiny fragments stayed in the larvae's bodies as they matured into flying adults.
Beads that were smaller than 2 micrometers in size transferred "readily" into pupae and adult stages, while larger beads that were 15 micrometers in size transferred at a "significantly reduced" rate, the paper states.
"Larvae are filter feeders that waft little combs towards their mouths, so they can't actually distinguish between a bit of plastic and a bit of food," lead researcher Amanda Callaghan of the University of Reading told The Guardian. "They eat algae, which are more or less the same size as these microplastics."
The study suggests that plastics could enter the larger food chain if birds, bats or other creatures eat the mosquitoes.
"The implication is that you can have plastics at the bottom of the pond that are now going up into the air and being eaten by spiders and bats and animals that normally wouldn't have access to that plastic," Callaghan told The Independent.
"You could have a dragonfly, for example, eating mosquitoes as they are emerging—so it could be eating lots of mosquitoes with plastic in them, and then a bird could be eating that and getting an even bigger dose."
The researchers are now studying if consuming plastics harms the mosquitoes, The Guardian reported.
"It is a shocking reality that plastic is contaminating almost every corner of the environment and its ecosystems," Callaghan added. "Much recent attention has been given to the plastics polluting our oceans, but this research reveals it is also in our skies."
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India is home to 21 of the world's 30 most polluted cities, but recently air pollution levels have started to drop dramatically as the second-most populated nation endures the second week of a 21-day lockdown amidst coronavirus fears, according to The Weather Channel.
By Eddie Ndopu
- South Africa is ground zero for the coronavirus pandemic in Africa.
- Its townships are typical of high-density neighbourhoods across the continent where self-isolation will be extremely challenging.
- The failure to eradicate extreme poverty is a threat beyond the countries in question.
The U.S. Food and Drug Administration has approved the use of two malarial drugs to treat and prevent COVID-19, the respiratory infection caused by the SARS-CoV-2 coronavirus, despite only anecdotal evidence that either is proven effective in treating or slowing the progression of the disease in seriously ill patients.
A team of scientists drilled into the ground near the South Pole to discover forest and fossils from the Cretaceous nearly 90 million years ago, which is the time when dinosaurs roamed the Earth, as the BBC reported.
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The challenges facing the world's oceans are well known: plastic pollution could crowd out fish by 2050, and the climate crisis could wipe out coral reefs by 2100.