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The spatiotemporal distribution and potential ecological risk of microplastics in sediment during different seasons in the Pearl River Delta, China
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Distribution and Risk Assessment of Microplastics in the Basin of the Pearl River, China
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Sampling along the entire length of China's Pearl River revealed microplastics throughout, with concentrations highest near the river's origin and estuary and the toxic polymer PMMA dominant in upstream sections. Rivers act as highways carrying land-based plastic pollution to the ocean, and the presence of highly toxic PMMA raises ecological risk concerns even where overall particle counts appear relatively low.
Spatiotemporal distribution and diversity of microplastics in the sediment of beaches in Xiamen City, China
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Researchers surveying beaches in Xiamen, China found that microplastic pollution levels varied significantly by season and location, with human activity patterns driving contamination in ways that highlight coastal tourism and urban runoff as key sources requiring targeted management.
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This review synthesizes research on the sources and ecological effects of microplastics in sediments, tracing transport pathways from terrestrial runoff through freshwater systems to marine sediment sinks and documenting impacts on benthic organisms and ecosystem function. Sediments serve as long-term reservoirs of microplastic pollution, making sediment ecology a critical lens for understanding cumulative environmental burden and food chain exposure risks posed by plastic debris.
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Researchers reviewed how microplastics accumulate in aquatic sediments — particularly the ocean floor — finding that sediments act as a long-term sink where plastics alter microbial communities and harm bottom-dwelling organisms, meaning the ecological damage of plastic pollution extends far beyond what is visible at the water surface.
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Indian coastal sediment survey finding MP peaks near river mouths during monsoon - 80748 — Spacecraft deployable structure microdynamics (not microplastics-related) - 34291 — AFM study of early-stage polymer wear at nanoscale (MP generation mechanism) - 60453 — New all-glass flotation method for extracting MPs from sediment, 92% recovery - 60446 — Low-cost sediment trap captures ~25% of MPs in flowing water - 60445 — Rural Kansas rivers contain MPs even upstream of urban areas - 60408 — Seabirds transport marine MP fibers to remote atoll soils via guano - 60404 — MPs found in mountain snowpack dust, possibly reducing snowmelt albedo - 60397 — Urban land cover correlates with MP levels in karst groundwater springs - 60376 — Asian clams may biologically indicate seasonal MP variation in freshwater - 60369 — MPs detected inside Mammoth Cave; surface rivers the primary entry vector - 60359 — First evidence of MPs in hailstones, showing atmospheric circulation of plastics - 60284 — Turbulent flow vertical mixing study for MP transport modeling - 60231 — Tire wear optimization method; tire particles are top MP source - 60206 — Rhizobiome microbes may help mitigate plastic pollution in soil - 59687 — Review of microbial plastic degradation capabilities and challenges - 59678 — Review of MP hazards and interactions in soil environments - 59675 — MPs found across cryosphere; ice melt may release stored plastics - 59671 — Review of microbial approaches to degrading macroplastic ocean waste - 59603 — Review of MP detection methods in water samples - 59591 — Particle size and density govern MP vertical mixing in water columns - 59538 — Review calling for standardized MP sampling and analysis protocols - 59513 — Review of micro/nanoplastic pollution in terrestrial ecosystems - 59468 — Review of MPs in water and removal performance of wastewater treatment plants - 59467 — Review of MP generation, spread, and management strategies - 59464 — Transformer neural network for automated, explainable MP detection in images - 59436 — Review of MP ecotoxicology across aquatic food webs - 59429 — Polymer type analysis of coastal MPs and the "missing plastics" question - 59420 — Pollution baseline assessment for North Evoikos Gulf, Aegean Sea - 59308 — Review of MP research gaps and data needs in South Asia
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