Plastic Pollution on Coral Reefs Found at Crazy Depths

A recent study has unveiled an alarming reality: plastic Pollution on coral reefs intensifies the deeper one ventures, posing an ’emerging threat’ to these biodiversity hotspots, already stressed by Climate change and overfishing.

Source: BBC News/YouTube

Scientists found that no coral reef is free from plastic waste. Shockingly, almost 75% of the larger debris found comprised ‘ghost gear‘ – discarded fishing equipment like ropes, lines, and nets. Other commonly found items included food wrappers and plastic bottles.

In the research, scientists explored 85 reefs in diverse locations, including uninhabited atolls and deep-sea reefs across the Indian, Pacific, and Atlantic oceans. Employing specialized diving gear, they ventured into the unexplored ‘twilight’ zones, 30 to 150 meters beneath the surface, and found an unexpected surge in plastic Pollution as they descended.

Luiz Rocha, co-director of the Hope for Reefs initiative, expressed surprise at the discovery, noting that these deep-sea reefs are generally further from the plastic pollution sources.

Interestingly, more plastic Pollution was observed in reefs closer to heavily populated cities, markets, and marine protected areas frequently visited by fishers. The plastic debris, scientists noted, can spur the spread of coral diseases, damage reef structures, and harm fish diversity.

Hudson Pinheiro, the lead author, emphasized the complex challenges that the study reveals regarding tackling plastic Pollution. He mentioned the need to broaden the scope of marine protected areas to encompass these deeper reefs and underscored the importance of addressing plastic Pollution at the source, including discarded fishing gear.

The study exposed the gravest impacts in Comoros, an island chain off the southeast coast of Africa, while the Marshall Islands were found to be the least polluted. The researchers speculate that the reason behind the accumulation of more plastic at greater depths might be the surface’s increased wave action and turbulence, which could pull debris deeper.

Highlighting the urgency of the issue, the researchers recommend developing low-cost, biodegradable alternatives to traditional fishing gear and intensifying global efforts to combat plastic Pollution.

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