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Microplastic pollution in seabed sediments at different sites on the shores of Istanbul-Turkey: Preliminary results
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Microplastic concentration in the sediment of the Istanbul Strait (the Sea of Marmara, Türkiye)
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Researchers found high levels of microplastic pollution in the sediment of the Istanbul Strait, with concentrations ranging from 144 to 700 particles per kilogram of dry sediment, predominantly as tiny fibers less than 1 mm in size. The findings suggest that dense shipping traffic, tourism, and a population of 20 million all contribute to contamination of this critical waterway.
Microplastic pollution in the Black Sea Coast of the Anatolian side of Istanbul, Turkey
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Researchers found tiny plastic bits and larger plastic debris scattered across beaches on Istanbul's Black Sea coast, with pollution levels varying a lot depending on location and time of year. This matters because plastic on beaches doesn't stay put, it breaks down further, washes into the sea, and can end up in seafood we eat, making coastal plastic pollution a starting point for microplastics potentially reaching our dinner plates.
Spatial Distribution and Contamination of Microplastics in Surface Sediments: A Case Study from Menekşe Beach, Marmara Sea, Türkiye
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Researchers analyzed microplastic abundance in beach sediments at Menekse Beach on Turkey's Marmara Sea, finding mean concentrations of over 25,000 items/kg—notably higher when detected by fluorescent microscopy than standard stereomicroscopy—with fragments and fine-grained sediments dominating. The high contamination levels linked to wastewater discharge and recreational activities in Istanbul illustrate how densely populated coastal cities act as major microplastic sinks in semi-enclosed seas.
Seasonal Distribution, Characterization, Indexing and Risk Assessment of Micro- and Nanoplastics in Coastal Sediments: a Case Study from Istanbul
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Researchers conducted the first year-long study of microplastic and nanoplastic pollution in coastal sediments on Istanbul's south coast, finding average concentrations of about 1,364 particles per kilogram and an extreme hazard index score, with microorganisms colonizing particle surfaces indicating potential for microplastics to carry pathogens into the marine environment.
Determination of microplastics and large plastics in the sediments of the Golden Horn Estuary (Halic), Istanbul, Turkey
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Scientists tested sediment from Istanbul's Golden Horn Estuary and found it heavily contaminated with plastic debris, including tiny microplastic fragments (smaller than a grain of rice) mixed in with larger plastic pieces. This matters because microplastics in waterways can enter the food chain through fish and shellfish, and eventually end up on our plates, though this particular study focused on measuring the pollution rather than testing health effects.
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