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02/24/2020 / By Divina Ramirez
A new type of plastic pollution has made its way to the shores of Madeira in Portugal, a recent study revealed. A team of researchers at Portugal’s Marine and Environmental Sciences Centre (MARE) identified the pollution as “plasticrust” – patches of plastic that encrust rocks along the shore. Ignacio Gestoso, a marine ecologist at MARE and the lead author of the study, said that the plasticrust likely came from large pieces of plastic debris that were crashing against the rocky shore. This debris then became embedded on the rocks, where they resembled algae and lichen.
Additionally, the team found a species of winkle sea snail feeding on the algae among the plasticrust, where they are vulnerable to contamination. Hence, the researchers worry that plastic can enter the human body through consumption of contaminated marine life, thereby causing numerous health complications and disorders.
The team initially monitored the shoreline of Madeira three years prior to the study, where they discovered the first patch of plasticrust. They also observed that the island had very little plastic content. Since then, plasticrust has spread to cover about 10 percent of the rocky surfaces along the shore.
Additionally, the researchers sought to identify the material comprising the plasticrust by conducting a series of chemical tests. They found that the plastic in the crust was polyethylene. As one of the most widely produced plastics, polyethylene is used in food packaging, plastic bags and medical devices.
Although polyethylene in its solid form is not considered toxic, it can be harmful to humans when it is absorbed into the body as a vapor or liquid. Moreover, because plastics are non-biodegradable, they simply break down into smaller pieces over time. As plastic degrades, toxic non-biodegradable components leak out to contaminate soil and bodies of water. In the case of plasticrust, polyethylene stuck to the rocky surfaces, where it became food for barnacles and snails. Hence, polyethylene can end up inside the body if sea creatures contaminated with plastic are consumed by humans. (Related: Due to extreme pollution of the world’s oceans, sea anemones are now eating microplastics.)
Because plasticrust poses a threat to marine life and humans, researchers emphasize that plasticrust is not only one of the most extensive pollution problems today, it is also a pressing issue for marine environment conservation.
Plastic is arguably the top pollutant in the world, and it has gone beyond polluting land and waterways. Nowadays, humans and animals suffer from consuming plastic-contaminated food and water. Toxic chemicals also comprise plastics, like phthalates, bisphenol-A (BPA) and polyvinyl chloride (PVC), then cause complications upon entering the body, from damaged organs to impaired body functions. Here are some of the ways that plastic can harm the body:
Plasticrust continues to be a threat to marine food webs, which include humans. Fortunately, the study from MARE can encourage experts to do further research in order to stop plastic pollution.
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