Volume of microplastics found on ocean floor triples in two decades, scientists warn
For decades microplastics have settled and piled up on the ocean floor, Mustafa Qadri writes
Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.Microplastic debris found on the bottom of ocean beds has tripled in the past two decades, scientists have warned.
That is despite repeated awareness campaigns and protests calling for the reduction of single-use plastic around the globe.
Study co-author Michael Grelaud said that analysed sediments have remained unaltered on the seafloor since they were deposited decades ago.
Researchers looked at material deposited in the northwestern Mediterranean for the study, the findings of which have been published in the journal Environmental Science and Technology.
The area was chosen, and the Ebro Delta in particular, because rivers are recognised as ‘hotspots’ for several pollutants and microplastics.
Researcher Laura Simon-Sánchez said: “Since 2000, the amount of plastic particles deposited on the seafloor has tripled and that, far from decreasing, the accumulation has not stopped growing mimicking the production and global use of these materials.”
“Since the 1980s, but especially in the past two decades, the accumulation of polyethene and polypropylene particles from packaging, bottles, and food films has increased, as well as polyester from synthetic fibers in clothing fabrics.”
The study found that the amount of each of the three particles reached a critical level of 1.5mg per kilogram of sediment collected, with polypropylene being the most abundant, followed by polyethylene and polyester.
The research team looked into the degradation status of the buried microplastics and found they no longer degrade, either due to lack of erosion, oxygen, or light.
Marine biologist Professor Patrizia Ziveri said: “The process of fragmentation takes place mostly in the beach sediments, on the sea surface or in the water column.
“Once deposited, degradation is minimal, so plastics from the 1960s remain on the seabed, leaving the signature of human pollution there.”
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments