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61,005 resultsShowing papers similar to Microplastic distribution within core sediments of beach and its responses to anthropogenic activities
ClearConsequences of anthropogenic activities and beach dynamics on vertical distribution of microplastics in the mid-intertidal sediments of Donghai Island, China
Researchers studied the vertical distribution of microplastics in intertidal sediments on Donghai Island, China, finding that depth profiles were strongly influenced by beach dynamics and human activity patterns. Microplastics were concentrated in the upper sediment layers, with anthropogenic disturbance intensifying accumulation. The study establishes baseline data for coastal microplastic monitoring and management.
Microplastic Distribution at Different Sediment Depths in an Urban Estuary
Researchers sampled sediment cores from an urban estuary to map how microplastic particles are distributed at different depths over time. The study found that microplastic density varied with sediment depth, reflecting historical changes in plastic pollution and urban runoff.
Vertical distribution of microplastics in bay sediment reflecting effects of sedimentation dynamics and anthropogenic activities
Researchers studied the vertical distribution of microplastics in sediment cores from the semi-enclosed Jiaozhou Bay, China, finding six polymer types with distribution patterns reflecting historical changes in plastic production and local pollution sources. Sediment depth was found to correlate with the era of plastic contamination, providing a record of microplastic accumulation over time.
Diving into the Depths: Uncovering Microplastics in Norwegian Coastal Sediment Cores
Researchers analyzed microplastic vertical distribution in sediment cores from five sites along the Norwegian coast extending to Arctic waters, filling a gap in high-resolution depth profile data for European and Arctic sediments. Microplastics were found throughout core depths with concentrations generally increasing toward the surface in patterns reflecting historical plastic production growth.
Changes in (micro and macro) plastic pollution in the sediment of three sandy beaches in the Eastern Mediterranean Sea, in relation to seasonality, beach use and granulometry
Researchers measured plastic and microplastic pollution in sediment from three Mediterranean beaches across seasons, finding that smaller microplastics accumulate at the backshore while larger items concentrate near the waterline. Seasonal patterns and beach use intensity affected plastic abundance, with implications for beach management and cleanup strategies.
Three-dimensional evaluation of beaches of oceanic islands as reservoirs of plastic particles in the open ocean.
This study investigated the three-dimensional distribution of plastic in beach sediment on three oceanic islands by sampling deeper than surface layers, finding that focusing only on the surface significantly underestimates total plastic standing stocks. The findings suggest that current estimates of beach plastic pollution are conservative and that plastics are being buried in the substrate over time.
Diving into the deep: unveiling small microplastics in Norwegian coastal sediment cores
Researchers examined the vertical distribution of small microplastics in five sediment cores from the Norwegian Coastal Current, using advanced analytical methods down to 11 micrometers combined with radiometric dating, finding widespread microplastic presence across sediment layers up to 19 cm depth and providing insights into historical deposition rates.
Three-dimensional distribution of plastic pellets in sandy beaches: shifting paradigms
Researchers dug up to 2 meters deep in sandy beaches near a river mouth in Spain and found plastic pellets at all depths, with surface layers holding less than 10% of the total subsurface abundance. The finding reveals that surface sampling dramatically underestimates beach plastic contamination and that pellets accumulate at depth through hydrodynamic burial processes.
Chronological evidence of microplastic accumulation and contamination onset in Central Baltic Sea sediments
Analysis of well-preserved Baltic Sea sediment cores revealed a 50-year chronological record of microplastic accumulation, showing contamination onset in the mid-20th century with accelerating deposition in recent decades.
A large-scale study of microplastic abundance in sediment cores from the UK continental shelf and slope
Microplastic abundance was surveyed in sediment cores from three areas of the UK continental shelf, establishing a baseline pollution profile across contrasting coastal environments. Concentrations varied considerably by location and depth, with the data providing a foundation for future risk assessments of seafloor contamination.
A Comprehensive Review on Microplastic in Beach Sediment
This review synthesises global data from approximately 1,700 beaches worldwide to characterise the occurrence, spatiotemporal distribution, sources, transport, and accumulation of microplastics in beach sediment, highlighting how external environmental forces, internal beach mechanisms, and local morphological characteristics govern microplastic deposition.
A review of microplastic distribution in sediment profiles
A review of microplastic distribution in marine sediment cores found that between 70–90% of environmental MPs accumulate in sediment profiles and that dated sediment cores can reconstruct historical MP deposition trends, with one Kuwaiti Bay core showing a 5-fold increase from 1951 to 2009.
Factors Influencing the Three-dimensional Distribution of Microplastics on Sandy Beaches: A Case Study from the Turkish Coast of the Black Sea
A study of nine Black Sea beaches in Turkey found that microplastic abundance varied significantly with beach width, sand grain size, organic content, and tourism pressure, revealing that local physical and human factors shape how microplastics accumulate across the three-dimensional sediment profile. These findings help explain why microplastic hotspots form on particular beaches and can guide targeted cleanup and monitoring efforts.
Factors driving the abundance and distribution of microplastics on sandy beaches in a Southwest Atlantic seaside resort
Researchers investigated factors driving microplastic abundance on sandy beaches along the Southwest Atlantic coast, finding that both natural forces like wave energy and anthropogenic inputs influenced the distribution of fiber and fragment microplastics in surface sediments.
Microplastic pollution in deep-sea sediments
Researchers analyzed deep-sea sediment cores and found microplastics present at depth, providing early evidence that deep-sea sediments globally accumulate microplastic pollution far from coastlines and at the seafloor.
Microplastic accumulation in deep-sea sediments from the Rockall Trough
Microplastics were found throughout sediment cores from over 2,000 meters depth in the North Atlantic's Rockall Trough, with concentrations decreasing with sediment age but extending well below the depth predicted by recent plastic production history, suggesting physical redistribution into older sediment layers. Microplastic abundance correlated with sediment porosity, indicating that pore water transport moves particles vertically after deposition.
Microplastics in Sediment Cores from Asia and Africa as Indicators of Temporal Trends in Plastic Pollution
By extracting microplastics from dated sediment cores in Japan, Thailand, Malaysia, and South Africa, researchers reconstructed the historical increase in plastic pollution over decades. The study shows that microplastic accumulation in sediments tracks the global rise in plastic production, making sediment cores a useful record of pollution history.
Can a Sediment Core Reveal the Plastic Age? Microplastic Preservation in a Coastal Sedimentary Record
Researchers used a sediment core from the NW Mediterranean Sea combined with state-of-the-art microplastic identification methods to reconstruct the historical record of microplastic pollution down to 11 micrometers in size. The core revealed a clear acceleration in microplastic burial rates since the 1960s and provided evidence that some polymer types are preserved well in sediment.
An assessment of microplastic contamination in beach sediment of Maharashtra State, India, with special reference to anthropogenic activities
Researchers quantified microplastic contamination across 25 beaches along the Maharashtra coast of India, finding widespread pollution with significant variation between sites. They identified microplastic concentrations correlated with anthropogenic activities near each sampling location. The study provides baseline data on coastal microplastic pollution in this densely populated region and highlights the connection between human activity and beach contamination levels.
Assessment of microplastics distribution and stratification in the shallow marine sediments of Samos island, Eastern Mediterranean sea, Greece
Researchers surveyed microplastic distribution in shallow marine sediments around Samos Island, Greece, finding the highest concentrations on beaches and lower levels in deeper offshore sediments. The study suggests that beaches act as accumulation zones for microplastic pollution carried from land.
[Characteristics of Microplastic Pollution in Sediment of Silty Coast in Culture Bay].
Microplastic characteristics and depth profiles were analyzed in deep sediments from a silty mudflat near a Haizhou Bay aquaculture area, providing rare data on vertical microplastic distribution in coastal sediment cores.
Revealing accumulation zones of plastic pellets in sandy beaches
Researchers evaluated plastic pellet accumulation across 13 sandy beaches in São Paulo state, Brazil, using transects and vertical sediment profiles to one meter depth, identifying regional accumulation hotspots near ports and factories and finding that coastal dunes accumulated more pellets than backshores, with most concentrated in the top 40 cm.
Occurrence and distribution of microplastics on recreational beaches of Haichow Bay, China
Microplastic occurrence and distribution were examined on recreational beaches of Haichow Bay, China, a heavily visited coastal area. The study found microplastics throughout the beach environment with patterns linked to beach use intensity, wave energy, and sediment type, establishing contamination data for a tourist-frequented coastline.
Plastic pollution in marine ecosystems: spatiotemporal assessment in beach sediments of protected coastal areas
Researchers conducted a spatiotemporal assessment of plastic pollution including microplastics in beach sediments across 13 beaches in marine protected areas in Colombia and the Canary Islands, Spain, evaluating plastic debris under varying environmental conditions in ecologically sensitive coastal zones.