More than 90% of deep-sea snails and mussels collected from hydrothermal vents over 2,000 meters down contained microplastics, marking the first documented contamination in these ecosystems.
Indian Ocean specimens carried nearly 15 times more microplastics than those from the southwestern Pacific, a gap researchers linked to heavy coastal activity and plastic inflows from major rivers.
Polystyrene from packaging and single-use containers made up most of the contamination, showing how common consumer plastics are reaching some of Earth’s most remote marine habitats.
Snails concentrated particles mainly in digestive organs, while filter-feeding mussels showed a more even spread across tissues, suggesting species biology shapes how microplastics accumulate.
The findings from KRIBB and KIOST add evidence that deep-sea vent ecosystems once seen as isolated now need environmental monitoring and conservation planning.
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Microplastic Pollution Reaches Deep-Sea Hydrothermal Vents: Global Spread, Ecological Risks, and Policy Responses
Overview
Recent research has revealed that plastic pollution now reaches even the most isolated deep-sea hydrothermal vent ecosystems, highlighting the unprecedented spread of microplastics across the planet. Once considered untouched, these remote environments are now contaminated as larger plastic debris breaks down into microplastics, which are then carried by ocean currents over vast distances. This widespread dispersal raises serious concerns about bioaccumulation in marine food webs and the overall impact on deep-sea biodiversity. The discovery provides crucial scientific evidence for understanding the global impact of plastic waste and underscores the urgent need for robust monitoring and conservation strategies.