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Microplastic concentration in the water column of the Banggai Sea, Central Sulawesi, Indonesia
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Scientists found microplastic pollution isn't just floating on the ocean surface, it's spread throughout the entire water column, from the surface down to the deep sea, in Indonesia's Banggai Sea, with tiny plastic fibers being the most common type found. This matters because these waters support fish and seafood that people eat, meaning plastic contamination at all depths could make its way into our food supply, not just from surface pollution but from deep-sea sources too.
Microplastic pollution in marine environments has been found from the surface layer to the deep sea. Oceanographic phenomena in the ocean and the tendency of microplastics to sink within the water column can facilitate their horizontal and vertical transport. This study determined the concentration and distribution of microplastics in the water column from the surface layer to the deep sea in the Banggai Sea, Indonesia, an area influenced by seasonal upwelling and located along the Indonesian Throughflow route. Samples were collected using a Rosette Water Sampler attached to a conductivity-temperature-depth (CTD) devices at four different depths. The samples were filtered using filter paper and observed following strict criteria combined with the hot needle test using a microscope. The average microplastic concentrations in the surface, maximum chlorophyll, thermocline, and deep-sea layers were 20.80 ± 6.52 particles/L, 23.65 ± 8.09 particles/L, 25.94 ± 10.79 particles/L, and 21.74 ± 8.52 particles/L, respectively. No difference was found among depth layers, but the concentrations varied significantly among stations. Fiber-shaped microplastics were the most common, accounting for 92.13 % of all particles. Raman microspectroscopy identified polyethylene terephthalate, polypropylene, polyvinyl chloride, and polystyrene polymers in the microplastic samples. Grouping stations based on phytoplankton abundance as a proxy for upwelling showed that microplastic concentration in the thermocline layer was lower in upwelling areas (21.16 ± 7.07 particles/L) compared to non-upwelling areas (30.73 ± 11.09 particles/L), indicating the potential role of upwelling in redistributing microplastics vertically.
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Microplastics ingestion by fish in the Pangandaran Bay, Indonesia
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Researchers examined the digestive tracts of 18 fish from Pangandaran Bay, Indonesia, finding 193 microplastic particles across two species — predominantly fragments (50%) and films (27%) — and providing the first documented evidence of microplastic contamination in fish from that coastal region.
Types and Abundance of Microplastics in Seawater and Sediment at Padang Beach Tourism Area, West Sumatra, Indonesia
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Scientists tested the water and sand at a popular Indonesian beach and found tiny plastic particles, called microplastics, almost everywhere, from crowded tourist spots to quieter areas. These plastic bits, made from materials like polyester and polystyrene, come in many shapes, sizes, and colors, showing just how widespread plastic pollution has become even in places people swim and relax. While this study didn't test direct health effects, it's a reminder that the microplastics we're exposed to at the beach, and that end up in seafood, are a growing part of daily life worth paying attention to.
Analysis of Marine Microplastics in the Water Column Sampled up to 300 M Depth
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Researchers sampled ocean water down to 300 meters depth and detected microplastics throughout the water column, demonstrating that plastic pollution extends well below the surface and is not limited to the shallow or coastal zones most commonly studied.
Occurrence of Microplastic Pollution in Marine Water
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Marine microplastic accumulation, estimated at over 250,000 tons in ocean environments, is driven by fragmentation of larger plastic debris and represents a persistent and growing contamination challenge. These particles are ingested by marine organisms across food web levels, raising concerns about biomagnification and human dietary exposure.
Microplastics in the Inshore and Offshore Surface Water in the Andaman Sea
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Surface water surveys in the Andaman Sea found microplastic concentrations averaging 0.27 particles per cubic meter, with polypropylene, polyethylene, and polystyrene as the dominant polymer types, and ocean circulation driving offshore accumulation. The results establish a baseline for a previously understudied marine region and underscore the need for expanded monitoring as currents redistribute plastic pollution across international waters.
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