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61,005 resultsShowing papers similar to Exploring carbon content variation in microplastics sequestrated from seawater to sediment in the Haima cold seep area
ClearOccurrence of microplastics in the Haima cold seep area of the South China Sea
Researchers characterized microplastic distribution in seawater, sediments, and shellfish from the Haima cold seep area in the South China Sea, providing baseline data on deep-sea plastic contamination in a unique chemosynthetic ecosystem.
Interactions of Microplastics and Methane Seepage in the Deep-Sea Environment
Researchers examined the accumulation of microplastics in cold seep sediments characterized by methane fluid seepage and chemosynthetic ecosystems in the deep sea, detecting 16 types of microplastics with high abundances at sediment surfaces. The findings suggest that cold seep environments act as effective sinks for small-scale microplastics under 100 micrometers and represent an important but overlooked reservoir in the marine carbon cycle.
Tracing the Century‐Long Evolution of Microplastics Deposition in a Cold Seep
Researchers traced a century of microplastic deposition in a deep-sea cold seep, finding that burial rates increased significantly since the 1930s in non-seepage areas, while methane seepage zones showed lower microplastic levels, suggesting potential microbial degradation of plastics.
Microplastics Affect Anaerobic Oxidation of Methane and Sedimentary Prokaryotic Communities in Cold Seep Areas
Laboratory experiments exposing cold seep seafloor sediments to microplastics for 120 days showed that polyamide and PET microplastics reduced methane oxidation rates to roughly a third of normal and altered the bacterial communities responsible for this process. Cold seep sediments are major global sinks for methane, so microplastic disruption of this microbial activity could have implications for greenhouse gas cycling in deep ocean environments.
Microplastic sink that cannot be ignored in chemosynthetic organisms
Researchers found microplastics in both mussels and squat lobsters collected from a cold seep chemosynthetic ecosystem in the South China Sea — a deep-sea environment previously unstudied for plastic pollution — with fibrous polyester particles dominating, suggesting cold-seep organisms may act as a biological sink for marine microplastics.
Effects of Different Types of Microplastics on Cold Seep Microbial Diversity and Function
Researchers simulated deep-sea cold seep conditions to study how different microplastics affect microbial communities. They found that microplastics made the plastisphere microbial networks more fragile than surrounding environments and disrupted nitrogen cycling and methane metabolism, while potentially concentrating pathogenic species.
Revealing the response of microbial communities to polyethylene micro(nano)plastics exposure in cold seep sediment
Researchers explored how polyethylene micro- and nanoplastics affect microbial communities in cold seep ocean sediments over a 120-day experiment. While the plastics did not significantly change overall microbial diversity, they did alter the community structure and affected methane-related metabolic processes. The study suggests that plastic pollution could interfere with important deep-sea biogeochemical cycles, including those involved in methane regulation.
Effects of microplastics on cold seep sediment prokaryotic communities
Researchers studied how polyethylene, polystyrene, and polypropylene microplastics affect microbial communities in cold seep sediments over a 120-day incubation period. The study found that microplastics significantly altered bacterial community structure in a type- and concentration-dependent manner, with some bacteria associated with plastic degradation increasing, while archaeal communities were less affected.
Plastic pollution in deep seafloor of the South China Sea
Researchers documented the abundance, distribution, and transport of plastics in the South China Sea using over 100 manned submersible dives combined with video analysis, finding that large plastics concentrate in canyon geomorphological units while microplastics predominate in coastal sediments via distinct transport mechanisms.
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.
Methane seepage leads to a specific microplastic aging process in the simulated cold seep environment
Laboratory experiments simulating cold seep conditions found that methane seepage accelerated microplastic surface aging — increasing roughness and oxidation — compared to weak seepage areas, suggesting deep-sea cold seeps represent a unique aging environment for microplastics.
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.
High Quantities of Microplastic in Arctic Deep-Sea Sediments from the HAUSGARTEN Observatory
Researchers found high quantities of microplastics in deep-sea sediments from the Arctic HAUSGARTEN observatory, demonstrating that even remote deep Arctic seafloor environments have accumulated significant microplastic pollution.
Prevalence of small high-density microplastics in the continental shelf and deep sea waters of East Asia
Researchers collected water samples at multiple depth layers across the continental shelf and deep sea of East Asia and found that small, high-density microplastics were more abundant in deeper waters, suggesting vertical sinking pathways concentrate certain particle types in the deep ocean.
effects of microplastic contamination of marine snow on the deep sea food chain and carbon sequestration by phytoplankton
This study examines the effects of microplastic contamination of marine snow on the deep-sea food chain and on carbon sequestration by phytoplankton, investigating how microplastics alter the biological pump that transports organic carbon from surface waters to the deep ocean. The findings highlight microplastics as a disruptive factor in deep-sea carbon cycling and trophic energy transfer pathways.
Microplastic type and concentration affect prokaryotic community structure and species coexistence in deep-sea cold seep sediments
Researchers conducted incubation experiments with cold seep sediments amended with four microplastic types (polyamide, polyethylene, polyethylene terephthalate, and polypropylene) at varying concentrations, finding that both MP type and concentration significantly altered prokaryotic community structure and species coexistence patterns.
Weathered microplastics alter deep sea benthic biogeochemistry and organic matter cycling: insights from a microcosm experiment
Weathered (aged) microplastics deposited in deep-sea sediments were found to alter benthic biogeochemical cycles, affecting nitrogen and carbon processing by seafloor microorganisms. The findings show that plastic pollution can disrupt the chemical ecology of even the most remote deep-ocean environments.
Distribution and controlling factors of microplastics in surface sediments of typical deep-sea geomorphological units in the northern South China Sea
Researchers collected surface sediments from typical deep-sea geomorphological units — sand dunes, sediment drifts, and submarine canyon channels and levees — in the northern South China Sea to examine how sedimentary dynamic conditions control the distribution of microplastics in deep-sea environments.
Synergetic effects of chlorinated paraffins and microplastics on microbial communities and nitrogen cycling in deep-sea cold seep sediments
Researchers studied the combined effects of chlorinated paraffins and microplastics on microbial communities in deep-sea cold seep sediments. They found that the two pollutants together disrupted nitrogen cycling processes more severely than either one alone, altering the composition of key microbial groups. The study suggests that the co-occurrence of these contaminants in deep-sea environments could have cascading effects on important ocean nutrient cycles.
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.
Microplastic Contamination of a Benthic Ecosystem in a Hydrothermal Vent
Researchers documented microplastic contamination in a deep-sea hydrothermal vent at the Central Indian Ridge for the first time. The study found microplastics in seawater, sediments, and all six major benthic species examined, with polypropylene, PET, and polystyrene fragments being the most common types, demonstrating that plastic pollution has reached even extreme deep-sea environments.
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 in the Deep-sea Sediment of Southwestern Sumatran Waters
Researchers found microplastic particles in deep-sea sediments off the coast of southwestern Sumatra, Indonesia — a country that ranks among the world's largest plastic waste producers. The presence of microplastics in deep-sea sediments confirms that plastic particles sink and accumulate even in remote ocean floor environments far from land.
Sinking microplastics at a deep-sea seamount in the North Atlantic: a year-long flux study
Sinking microplastics were collected from sediment traps deployed at a deep-sea seamount in the North Atlantic, providing direct evidence of how plastic particles travel from the surface to the deep ocean floor. The study quantifies the deep-sea plastic flux at an ecologically significant seafloor feature.