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New study: Deep-sea mining waste could impact global fisheries

2025-11-10 08:06:00, Kuriozitete CNA

New study: Deep-sea mining waste could impact global fisheries

Deep-sea mining waste could disrupt marine food chains and threaten global fisheries, the latest study in the field warns. 

Drilling for minerals in the deep ocean could have major consequences for the small animals at the core of the vast marine food web and ultimately affect fisheries and the food we find on our plates. 

Deep-sea mining means drilling the seabed for polymetallic nodules laden with critical minerals, including copper, iron, zinc and more.

Researchers from the University of Hawaii studied an area of ??the Pacific Ocean called the "twilight zone," about 200 to 1,500 meters below sea level. Their peer-reviewed findings, published Thursday in the scientific journal Nature Communications, say mining debris can affect everything from tiny shrimp less than 2 millimeters long to fish 5 centimeters long.

That's because, after mining companies bring the mineral-rich nodules to the surface, they have to release excess seawater, ocean floor dust and sediment back into the ocean. This creates a dark cloud of particles about the same size as naturally occurring food particles that are normally eaten by zooplankton swimming at that depth. /CNA





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