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Started by Recusant, December 22, 2021, 07:45:23 PM
QuotePublished in the journal Nanomaterials, the study was carried out in an animal model with oral administration of MNPs, in this case polystyrene, a widely-used plastic which is also found in food packaging. Led by Lukas Kenner (Department of Pathology at MedUni Vienna and Department of Laboratory Animal Pathology at Vetmeduni) and Oldamur Hollóczki (Department of Physical Chemistry, University of Debrecen, Hungary) the research team was able to determine that tiny polystyrene particles could be detected in the brain just two hours after ingestion.
Quote from: MarcusA on April 24, 2023, 08:30:21 AMOn human waste in general: it goes on. Life goes on but probably not for very much longer at the rate that humans are laying waste to the planet, our home.
QuoteThe North Pacific "Garbage Patch" is home to an abundance of floating sea creatures, as well as the plastic waste it has become famous for, according to a study by Rebecca Helm from Georgetown University, U.S., and colleagues. The paper is published in the open access journal PLOS Biology.There are five main oceanic gyres—vortexes of water where multiple ocean currents meet—of which the North Pacific Subtropical Gyre (NPSG) is the largest. It is also known as the North Pacific "Garbage Patch," because converging ocean currents have concentrated large amounts of plastic waste there.However, many floating ocean creatures, such as jellyfish (cnidarians), snails, barnacles and crustaceans, may also use currents to travel through the open ocean, but little is known about where they live.The researchers took advantage of an 80-day long-distance swim through the NPSG in 2019 to investigate these floating lifeforms, by asking the sailing crew accompanying the expedition to collect samples of surface sea creatures and plastic waste. The expedition's route was planned using computer simulations of ocean surface currents to predict areas with high concentrations of marine debris.The team collected daily samples of floating life and waste in the eastern NPSG, and found that sea creatures were more abundant inside the NPSG than on the periphery. The occurrence of plastic waste was positively correlated with the abundance of three groups of floating sea creatures: sea rafts (Velella sp), blue sea buttons (Porpita sp) and violet sea snails (Janthina sp).[Continues . . .]
QuoteAbstract:Floating life (obligate neuston) is a core component of the ocean surface food web. However, only 1 region of high neustonic abundance is known so far, the Sargasso Sea in the Subtropical North Atlantic gyre, where floating life provides critical habitat structure and ecosystem services. Here, we hypothesize that floating life is also concentrated in other gyres with converging surface currents. To test this hypothesis, we collected samples through the eastern North Pacific Subtropical Gyre in the area of the North Pacific "Garbage Patch" (NPGP) known to accumulate floating anthropogenic debris. We found that densities of floating life were higher inside the central NPGP than on its periphery and that there was a positive relationship between neuston abundance and plastic abundance for 3 out of 5 neuston taxa, Velella, Porpita, and Janthina. This work has implications for the ecology of subtropical oceanic gyre ecosystems.