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Papers
20 resultsShowing papers similar to Microplastics in the marine environment: A review of their sources, distribution processes, uptake and exchange in ecosystems
ClearThe factors influencing the vertical transport of microplastics in marine environment: A review
This review examines the factors that cause microplastics to sink from the ocean surface to deeper waters and sediments, including particle properties, biofouling by marine organisms, and interactions with marine snow. Researchers found that biological processes like ingestion and egestion by marine animals play a major role in transporting even lightweight plastics to the seafloor. Understanding these vertical transport mechanisms is essential for accurately assessing where microplastics accumulate in the ocean.
A review of possible pathways of marine microplastics transport in the ocean
This review examines the major pathways by which marine microplastics are transported through the ocean, including surface currents, vertical mixing, biological uptake, and seafloor deposition. Understanding these transport mechanisms is essential for predicting where plastic pollution accumulates and how it affects marine ecosystems.
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.
Biological effects on the migration and transformation of microplastics in the marine environment
This review synthesizes how biological activities including biofouling, ingestion, and biodegradation influence the migration, distribution, and transformation of microplastics in marine environments across four key mechanisms.
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.
Sinking characteristics of microplastics in the marine environment
This study investigated the sinking behavior of microplastics in the marine environment, finding that particle properties such as density, shape, and biofouling strongly influence whether particles float or sink, helping explain why much of the expected floating plastic is unaccounted for.
Marine microplastic debris: a targeted plan for understanding and quantifying interactions with marine life
This review examines the mechanisms by which marine organisms interact with microplastic debris and proposes a targeted research plan for understanding and quantifying these interactions and their role in redistributing plastic throughout ocean environments. The authors synthesize laboratory and field evidence showing that biotic processes - including ingestion, egestion, and biofouling - may significantly alter the spatial distribution and long-term fate of microplastics in marine systems.
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.
Microplastics as contaminants in the marine environment: A review
This review synthesized the state of knowledge on microplastics as marine contaminants, covering their sources, pathways, distribution, biological uptake, and potential ecological and toxicological effects.
Vertical transport of buoyant microplastic particles in the ocean: The role of turbulence and biofouling
Researchers modeled how turbulence and biofouling interact to determine the vertical movement of buoyant microplastic particles in the ocean. They identified three distinct flow regimes that govern whether microplastics stay at the surface, oscillate, or sink to the seafloor. The study helps explain the observation that even low-density microplastics are found in deep ocean sediments, suggesting biofouling-driven density changes are a key transport mechanism.
Physical transport properties of marine microplastic pollution
Researchers reviewed the physical transport properties of marine microplastics — including buoyancy, settling velocity, and biofouling effects — and developed models predicting the dispersal of both pelagic and benthic plastic pollution from land-based sources across different ocean regions. The study highlights how hydrodynamic behavior varies by polymer type and particle size, leading to differential accumulation patterns in surface waters, the water column, and seafloor sediments.
Ups and Downs in the Ocean: Effects of Biofouling on Vertical Transport of Microplastics
Researchers developed the first theoretical model to simulate how biofouling, the growth of microbial biofilms on plastic surfaces, affects the vertical movement of microplastics in the ocean. The model predicts that depending on particle size and density, fouled microplastics may float, sink to the seafloor, or oscillate at intermediate depths. These findings help explain why small microplastics seem to disappear from the ocean surface and suggest they may concentrate at mid-water depths where vulnerable species live.
Modeling submerged biofouled microplastics and their vertical trajectories
Researchers modeled how biofouling — the growth of algae and microbes on plastic surfaces — affects the vertical movement of microplastic particles in the open ocean. Biofouling increased sinking rates, causing microplastics to accumulate at depth rather than floating at the surface. This has implications for understanding where microplastics end up in the water column and how they are ingested by deep-water organisms.
Sinking rates of microplastics and potential implications of their alteration by physical, biological, and chemical factors
Researchers conducted sinking experiments with diverse microplastic particles and found that sinking velocity depends not only on density and size but also on particle shape, and that biofouling and weathering can substantially alter sinking rates with implications for how microplastics distribute through the water column.
Occurrence, effects and risks of marine microplastics
This review summarizes the state of knowledge on the occurrence, biological effects, and ecological risks of microplastics in the marine environment. It covers plastic sources, distribution patterns, ingestion by marine organisms, and the transfer of chemical pollutants through marine food webs, concluding that microplastic pollution poses serious and growing risks to ocean ecosystems.
A Review of Microplastics and Their Impact on Ocean Ecosystems
This review examined the impact of microplastics on ocean ecosystems, covering distribution from surface to deep sea, ingestion by marine organisms across the food web, and effects on ocean chemistry and biological productivity. It found pervasive contamination with cascading ecosystem-level consequences.
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.
Dispersion, accumulation and the ultimate fate of microplastics in deep-marine environments: A review and future directions
This review synthesized existing knowledge on microplastic distribution in deep-marine environments, integrating process-based sedimentological transport models with field data to outline how microplastics disperse, accumulate, and become buried in seafloor sediments, and identifying key gaps for future research.
Dispersion, 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.
Microplastics in the marine environment: From top to bottom
This thesis investigates how microplastics are transported vertically through the marine water column via biological mechanisms, from surface waters to the deep sea. It contributes to understanding how organisms like zooplankton and jellyfish accelerate the sinking and redistribution of microplastic particles.