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61,005 resultsShowing papers similar to Microplastics in sediments: a comparison within zones located worldwide with different impact
ClearMicroplastics in sediments: a comparison within zones located worldwide with different impact
Researchers collected 25 sediment samples from six coastal areas worldwide spanning depths from 1 to 426 meters during 2022 and 2023 to compare microplastic abundance in zones with different levels of anthropogenic impact. They found a mean microplastic concentration of 308.81 items per kg dry weight across all sites, ranging from 20.79 items per kg in touristic Palma, Mallorca to 872.95 items per kg in the highly urbanized Ilha da Mare in Brazil, with fibers comprising approximately 95% of detected particles.
Global mapping for the occurrence of all-sized microplastics in seafloor sediments
Researchers compiled global seafloor microplastic data from 155 marine sediment samples including detailed sampling metadata and abundance measurements for 20 microplastic categories, providing foundational data for understanding the distribution and uncertainty of microplastic contamination on the seafloor.
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.
The fate of microplastic in marine sedimentary environments: A review and synthesis
A systematic review of 80 papers on microplastics in marine sediments found median concentrations varied widely by sediment environment, with fibers dominating many locations, and showed that sediment grain size and organic carbon content influence microplastic accumulation.
Ubiquity of microplastics in coastal seafloor sediments
Researchers applied a novel method to quantify microplastic concentrations in seafloor sediments from 42 coastal sites across southeastern Australia. They found microplastics in all samples at an average concentration of 3.4 particles per milliliter of sediment, predominantly as filaments. The study demonstrates that microplastic contamination of coastal seafloor sediments is ubiquitous and that hydrological and sediment properties influence deposition patterns.
Comparison of Microplastic abundance in varying depths of deep-sea sediments, Bay of Bengal
Researchers measured microplastic concentrations in deep-sea sediment samples from the Bay of Bengal at depths of 225 to 1,070 meters, finding the highest concentrations at intermediate depths. The findings add to evidence that microplastics have penetrated into deep-sea environments far from the surface.
Deep Sea Microplastic Pollution Extends Out to Sediments in the Northeast Atlantic Ocean Margins
Researchers surveyed deep-sea sediments across four areas of the Northeast Atlantic and detected microplastics at 75% of stations sampled, finding no hotspots and no clear correlation with depth or distance from land, demonstrating the widespread extent of deep-sea microplastic contamination.
An integrated assessment of microplastic pollution in coastal surface water and sediment of Japan
Researchers conducted a comprehensive survey of microplastic pollution across 14 coastal locations around Japan from Hokkaido to Okinawa, measuring concentrations of 288.7 g/km2 in surface water and 1,185 kg/km2 in sediment and characterizing polymer types, shapes, and size distributions.
Microplastics in the Mediterranean Sea: Deposition in coastal shallow sediments, spatial variation and preferential grain size
Researchers sampled Mediterranean coastal shallow sediments and found microplastics throughout, with concentrations and polymer types reflecting land-based inputs and showing that coastal sediments are a significant regional reservoir for plastic debris.
Estimating global marine surface microplastic abundance: systematic literature review
Researchers conducted a systematic literature review to estimate global marine surface microplastic abundance, compiling data from studies worldwide to produce abundance maps. The study found significant variation in microplastic concentrations across different ocean regions, providing a broader picture of the scale and distribution of marine microplastic pollution.
The role of oceanographic processes and sedimentological settings on the deposition of microplastics in marine sediment: Icelandic waters
Researchers analyzed microplastics from marine sediment cores collected at eight sites on the Iceland continental shelf, examining how oceanographic processes and sedimentological settings influence the deposition and distribution of microplastic debris on the seafloor.
Fate of microplastics in deep-sea sediments and its influencing factors: Evidence from the Eastern Indian Ocean
Surface sediments from 26 sites in the deep basin of the Eastern Indian Ocean were analyzed for microplastics, finding concentrations ranging widely and influenced by water depth, distance from land, and ocean current patterns. The study extends deep-sea microplastic monitoring to the Indian Ocean and identifies oceanographic transport as a key control on plastic distribution.
A large-scale investigation of microplastic contamination: Abundance and characteristics of microplastics in European beach sediment
This large-scale investigation characterized microplastic contamination across a wide geographic area, documenting abundance and polymer types and providing a baseline dataset for tracking pollution trends over time.
Distribution and abundance of microplastics in coastal sediments depends on grain size and distance from sources
A large survey of intertidal and subtidal sediments at protected coastal sites in Ireland found microplastics at 87 locations with concentrations correlated to sediment grain size and distance from urbanized areas, suggesting that even habitats within conservation zones accumulate significant microplastic loads from diffuse regional sources.
Occurrence and spatial distribution of microplastics in sediments from Norderney
Researchers surveyed sediments from Norderney in the North Sea and found widespread microplastic contamination, documenting spatial distribution patterns and particle characteristics across this tidally influenced coastal environment.
Microplastics and its Impacts on Marine Environment and Biotic Communities – A Global Perspective
This review synthesizes global microplastic research conducted across seven continents, documenting the physical and chemical characteristics of microplastics, their bioaccumulation in sediments and marine organisms, and comparing detection technologies used across different regions.
Distribution of microplastics in soil and freshwater environments: Global analysis and framework for transport modeling
Researchers analyzed microplastic concentrations reported across 196 studies from 49 countries and found that levels in soils, sediments, and surface water can vary by up to eight orders of magnitude. The study suggests that inland sources like urban stormwater carry concentrations up to 100 times higher than rivers transporting microplastics to coastal areas, and that only 20% of studies captured particles below 20 micrometers, meaning actual contamination may be significantly underestimated.
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.
Quantifying microplastic mass in deep-sea sediment along a transect in the north pacific
Researchers collected sediment cores at six sites along an 800-km east-west transect offshore from San Diego and used pyrolysis-GC/MS targeting ten polymers to quantify microplastic mass fractions, finding higher polymer detection rates and concentrations at sites closer to shore compared to offshore locations.
Plastics from Surface to Seabed: Vertical Distribution of (Micro)plastic Particles in the North Pacific Ocean
Researchers investigated the vertical distribution of microplastics across the water column and deep-sea sediments (>5 km) in the North Pacific Ocean, finding concentrations of 8-2600 items/m3 in the water column and 1100-3200 items/kg in sediments, with distinct patterns across the North Pacific Subtropical Gyre, Papahanaumokuakea Monument, and a less-polluted open ocean site.
Microplastic pollution in deep-sea sediments and organisms of the Western Pacific Ocean
Researchers collected deep-sea sediment and organism samples from multiple sites in the western Pacific Ocean and found microplastics at all locations sampled, with depth, distance from land, and current patterns influencing accumulation, confirming the western Pacific deep sea as a significant microplastic sink.
Initial Survey of Microplastics in Bottom Sediments from United States Waterways
Researchers conducted an initial survey of microplastic abundance, occurrence, and polymer composition in bottom sediments from nine dredged US waterways and two reference areas, finding particle counts ranging from 162 to 6,110 particles per kilogram dry weight.
Occurrence and distribution of microplastics in marine sediments along the Belgian coast
Researchers surveyed marine sediments along the Belgian coast and found microplastics distributed across all sampled sites, documenting their occurrence and characteristics in this heavily trafficked North Sea coastal environment.
A global assessment of microplastic abundance and characteristics on marine turtle nesting beaches
Researchers coordinated a global sampling effort across 209 marine turtle nesting beaches in six ocean basins to assess microplastic contamination in beach sediments. They found microplastics present on 45% of beaches, with the Mediterranean showing the highest contamination rate at 80%. The study provides an open-access dataset to support ongoing monitoring of plastic pollution in critical nesting habitats.