Colonies of microbes seem to be "eating" plastic pollution floating on the surface of the ocean, according to researchers from the University of Western Australia.
The research by PhD candidate Julia Reisser and colleagues was the first to document biological communities living on sand-sized pieces of plastic in Australian waters. It has been published in the international science journal PLOS One.
Using a scanning electron microscope, researchers examined the samples - tiny broken down discarded items such as food packaging and fishing gear - and could see microbes "eating" the plastic.
"The good news is that some of the plastic inhabitants may decrease plastic pollution at the sea surface, where major environmental impacts occur," the university said in a statement.
Study co-author Jeremy Shaw said large numbers of silica-forming algae weighed down their plastic host, potentially causing tiny pieces to sink to the bottom of the ocean.
"Plastic biodegredation seems to happen at sea," Ms Reisser said.
"I am excited about this because the `plastic eating' microbes could provide better solutions for waste disposal practices on land."
