A tiny, mouthless worm may be helping scientists rethink what happens to "biodegradable" plastic once it enters the natural world, Discover Wildlife reported.
Researchers at the Max Planck Institute for Marine Microbiology found that Olavius algarvensis, a marine worm that survives with help from bacteria living inside its body, appears to share a bioplastic-breaking ability with 66 other animal species.
Here's what to know
According to Discover Wildlife, the finding involves the worm's relationship with symbiotic bacteria and an apparent ability within that partnership to break down a type of bioplastic. The bacteria build up the material as a way to stockpile spare carbon and energy for later.
The researchers also turned up signs of a comparable setup in other animals, hinting that this kind of bioplastic degradation could be more common than scientists once believed.
In many cases, the breakdown process depends on the right organisms being present and on the right environmental conditions.
Because the worm lacks both a mouth and a digestive system, it depends on bacterial partners for nutrients, and possibly for handling a plastic-derived material as well. The findings suggest nature may already contain biological pathways that could help scientists better understand how some plastics break down outside industrial composting systems.
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More background
Bioplastics are often marketed as a cleaner alternative to conventional plastics, but "biodegradable" does not always mean a material will quickly disappear in oceans or soil.
Plastic pollution remains a growing problem around the world. Conventional plastic waste lingers for decades or even longer before breaking into smaller fragments that can spread through ecosystems and food chains.
That has made bioplastics an appealing alternative, especially for packaging and other short-lived products. But at the same time, some bioplastics decompose only under tightly controlled conditions. That means they may not behave much differently from traditional plastic once they escape into the environment.
If scientists can identify which animals and microbes are involved in breaking down specific materials, that could help improve how future bioplastics are designed.
Future bioplastics could be designed to be compatible with the organisms and conditions they are likely to encounter after disposal.
What's being done?
Researchers are continuing to study the enzymes and microbial partnerships that allow certain materials to break down.
That work could eventually help manufacturers develop plastics that are easier for natural or managed systems to process.
It could also support better waste infrastructure. If scientists know more about which materials degrade under which conditions, cities and companies can make smarter decisions about waste management systems.
The new finding does not solve the plastic crisis on its own. But it offers a promising clue that some answers may come from understanding more about the natural world.
Where can I learn more?
Other studies are also helping scientists understand how to manage plastic waste.
• Scientists studying beetle larvae found superworms with unusual diets could reveal new plastic-processing pathways.
• A newly isolated marine fungus showed plastic-eating biology in action beneath the ocean's surface.
• Researchers found widespread contamination in worms and other invertebrates as plastics spread on land.
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