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61,005 resultsShowing papers similar to Dispersion, accumulation and the ultimate fate of microplastics in deep-marine environments: A review and future directions
ClearDispersion, Accumulation, and the Ultimate Fate of Microplastics in Deep-Marine Environments: A Review and Future Directions
This review synthesizes knowledge about how microplastics are transported to and accumulate in deep-marine environments, which may serve as the ultimate sink for ocean plastic pollution. Researchers integrated sedimentological models to explain how ocean currents, density flows, and settling processes deliver microplastics to the seafloor. The study highlights that deep-sea environments, often considered pristine, are increasingly contaminated with microplastic particles.
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.
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.
Elucidating the vertical transport of microplastics in the water column: A review of sampling methodologies and distributions
This review synthesized sampling methodologies and findings on microplastic vertical distribution in the water column, identifying that surface trawl studies dramatically underestimate total water column burdens and that sinking behavior, biofouling, and hydrodynamic processes create complex depth-dependent distribution patterns.
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.
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.
Modelling the sedimentation of macro-, micro- and nanoplastics in the ocean from surface to sediment
Researchers modeled the sedimentation of macro-, micro-, and nanoplastics from the ocean surface to the seafloor, finding that biofouling and particle aggregation dramatically accelerate sinking rates and that most plastics eventually reach benthic environments.
Research Progress in Transfer, Accumulation and Effects of Microplastics in the Oceans
This review summarized global research on microplastic distribution, accumulation, and biological effects in ocean environments, covering transport mechanisms from surface to deep sea, ingestion across the food web, and evidence for physical and chemical toxicity to marine organisms.
First long-term evidence of microplastic pollution in the deep subtropical Northeast Atlantic
Researchers found microplastic particles in all 110 sediment trap samples collected over a 12-year period from 2,000-meter depths in the Northeast Atlantic, establishing the deep ocean as a long-term sink for microplastics with fluxes increasing over time.
High Abundances of Microplastic Pollution in Deep-Sea Sediments: Evidence from Antarctica and the Southern Ocean
Microplastic pollution was investigated in deep-sea sediments from Antarctic and Southern Ocean regions, finding high abundances that varied among sites. The study confirmed that microplastics are accumulating in the remote Antarctic deep-sea environment, with evidence going back to scientific literature from the 1980s that has accelerated in recent years.
Distribution and importance of microplastics in the marine environment: A review of the sources, fate, effects, and potential solutions
This review synthesized research on the distribution and significance of microplastics across the marine environment, covering sources, transport pathways, ecological interactions, and the state of knowledge on biological and chemical effects.
Plastics from Surfaceto Seabed: Vertical Distributionof (Micro)plastic Particles in the North Pacific Ocean
Researchers investigated the vertical distribution of microplastics from surface waters to deep-sea sediments (>5 km) in the North Pacific Ocean, documenting concentrations of 8-2600 items/m3 in the water column and 1100-3200 items/kg in sediments across the North Pacific Subtropical Gyre, Papahanaumokuakea Monument, and a less-polluted reference site.
The first report on emerged microplastics in deep-sea sediment: Insights from the Central Indian Ocean Basin
Researchers reported the first detection of emerged (beach-cast) microplastics in deep-sea sediments from an understudied region, characterizing particle types, polymer composition, and likely transport pathways. The findings confirm that even remote deep-sea environments receive microplastic inputs.
Microplastics in the marine environment: A review of their sources, distribution processes, uptake and exchange in ecosystems
Researchers reviewed the literature on how microplastics move through marine environments, finding that while plastic density helps predict vertical distribution in the water column, biological interactions — such as ingestion and biofouling — better explain why buoyant plastics end up at great ocean depths and transfer through food webs. The review underscores that microplastic bioaccumulation is driven as much by ecology as by physical properties.
Microplastics in turbidity currents: transport and sedimentation
Researchers investigated the transport and sedimentation behavior of microplastics within turbidity currents, examining how these high-density submarine sediment gravity flows carry MP particles from continental shelves to deep-sea environments and what controls where MPs ultimately deposit.
A novel method enabling the accurate quantification of microplastics in the water column of deep ocean
A new sampling method was developed to accurately measure microplastics in the deep ocean water column, addressing gaps left by traditional net trawls that miss very small particles. Reliable deep-sea sampling is critical since the deep ocean is thought to be a major sink for global microplastic pollution.
Not just settling
This perspective piece describes research showing that deep-sea microplastic distribution is controlled not by simple sinking from the surface but by deep ocean thermohaline currents that create localized accumulation hotspots on the seafloor. Understanding these current-driven concentration patterns changes how scientists model microplastic fate in the deep ocean.
Depth profiles of microplastics in sediments from inland water to coast and their influential factors
This review examines how microplastics settle and accumulate in deep sediment layers from rivers to coastal areas, revealing that contamination extends well below the surface. Generally, smaller microplastics are found at greater depths, and the abundance varies significantly from site to site. Understanding how microplastics bury themselves in sediments is important because these hidden reservoirs could release particles back into water supplies over time, affecting both ecosystems and human water sources.
Marine snow as vectors for microplastic transport: Multiple aggregation cycles account for the settling of buoyant microplastics to deep‐sea sediments
Researchers developed a model explaining how buoyant microplastics end up in deep-sea sediments through repeated cycles of incorporation into marine snow aggregates. They showed that multiple aggregation-sinking-disaggregation cycles can progressively transport low-density microplastics from the ocean surface to the seafloor. The study provides the first comprehensive theoretical framework for understanding the full journey of buoyant microplastics from surface waters to deep-sea deposits.
The vertical distribution and biological transport of marine microplastics across the epipelagic and mesopelagic water column
Remotely operated vehicles and custom samplers were used to collect microplastics from depths of 5–1000 m in Monterey Bay, finding that microplastic concentrations in mesopelagic waters (200–600 m depth) were comparable to or higher than surface concentrations. The study demonstrates that the deep ocean is not merely a sink but an active reservoir of microplastics vertically transported by biological organisms.
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.
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.
The combined role of near-bed currents and sub-seafloor processes in the transport and pervasive burial of microplastics in submarine canyons
Researchers studied how near-bed currents and sub-seafloor processes interact in submarine canyons to transport microplastics to deep-sea sediments, finding that canyon systems record temporal trends in plastic pollution but that physical disturbance can obscure or rework the depositional signal.
Review on the distribution of microplastics in the oceans and its impacts: Need for modeling-based approach to investigate the transport and risk of microplastic pollution
This review synthesizes evidence on microplastic distribution across global oceans and argues that modeling-based approaches are urgently needed to better understand transport pathways and assess pollution risks at scale.