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Microplastic pollutants in the coastal dunes of Lake Erie and Lake Ontario
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Transportation of Microplastics to Terrestrial Dunes from the Shorelines of Lake Ontario and Lake Erie, Ny
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Microplastics from Great Lakes shorelines are transported landward by onshore winds and deposited in terrestrial dune sediments along Lakes Ontario and Erie, demonstrating that wind-driven transport extends microplastic contamination beyond aquatic environments. This previously undocumented pathway suggests microplastic pollution in dune ecosystems may be more widespread than current aquatic-focused monitoring captures.
Microplastics in Beach Sediment Along Southern Shores of Lake Michigan
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Microplastics were detected at all four Indiana beaches along southern Lake Michigan, with pellets and foam being the dominant types and concentrations rivaling those found in marine coastal environments. This confirms the Great Lakes as a significant freshwater reservoir of microplastic pollution, raising concerns about contamination of a major drinking water source.
Covariance of Particle Size and Shape of Microplastic Pollutants Transported to Terrestrial Dunes from the Shores of Lake Erie and Lake Ontario, Ny and Pa
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Wind-driven transport deposits microplastics of diverse sizes and shapes—including spheres, fragments, and fibers—from Great Lakes shorelines into terrestrial dune sediments, with surface and subsurface samples both showing contamination. The covariance of particle size and shape in these deposits reflects the physical sorting processes of aeolian transport, informing how microplastics disperse beyond aquatic systems into terrestrial landscapes.
Occurrence, Sources, Transport, and Fate of Microplastics in the Great Lakes–St. Lawrence River Basin
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Researchers documented that microplastics smaller than five millimeters are present throughout the Great Lakes and St. Lawrence River system, from tributary streams to the Atlantic Ocean. This finding suggests that the Great Lakes region is both a major accumulation zone and a transport pathway for microplastic pollution into the broader marine environment.
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This review synthesizes Canadian microplastic studies across water, wastewater, biosolids, and sediment, finding fibers and fragments most prevalent and polyethylene, PET, and polypropylene as dominant polymers across matrices. The Canadian-specific analysis highlights significant data gaps and the need for standardized national monitoring as plastic contamination increasingly reaches remote environments and enters the human food chain.
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