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61,005 resultsShowing papers similar to Microplastics in Nearshore and Subtidal Sediments in the Salish Sea: Implications for Marine Habitats and Exposure
ClearInfluence of marine habitat on microplastic prevalence in forage fish and salmon in the Salish Sea
Scientists examined microplastic ingestion in forage fish and juvenile salmon across different marine habitats in the Salish Sea of the Pacific Northwest. They found that fish from nearshore urban areas had more microplastics in their stomachs than those from offshore or less developed areas. The results suggest that habitat type and proximity to human activity are important predictors of microplastic exposure in marine food webs.
Extent of microplastics in Pacific Sand Lance burying habitat in the Salish Sea
This study assessed microplastic concentrations in sandy habitat used by Pacific sand lance in the Salish Sea, finding widespread contamination. Sand lance are a key forage fish species, and microplastic contamination in their habitat raises concerns about effects on the broader coastal food web including marine mammals and seabirds.
Microplastics in juvenile Chinook salmon and their nearshore environments on the east coast of Vancouver Island
Researchers investigated microplastic ingestion in juvenile Chinook salmon and their nearshore marine environments on the east coast of Vancouver Island, finding microplastics present in both fish digestive tracts and surrounding waters and characterizing the types of particles consumed.
Abundance of microplastics in intertidal and subtidal regions: A) sediments and B) water.
This study presents abundance data for microplastics in both intertidal and subtidal regions, comparing concentrations in sediment and water across habitat zones.
Environmental implications of microplastic pollution in the Northwestern Pacific Ocean
Researchers assessed microplastic concentrations, distribution, and characteristics across the Northwestern Pacific Ocean, finding widespread contamination with significant spatial variation and identifying environmental implications for marine ecosystems in this understudied region.
Occurrence and size distribution of microplastics in mudflat sediments of the Cowichan-Koksilah Estuary, Canada: A baseline for plastic particles contamination in an anthropogenic-influenced estuary
Researchers established baseline microplastic contamination levels in mudflat sediments of the Cowichan-Koksilah Estuary in Canada, documenting particle size distributions and polymer types in this ecologically important habitat for shellfish, fish, and birds.
Microplastics in bivalves and their habitat in relation to shellfish aquaculture proximity in coastal British Columbia, Canada
Researchers compared microplastic concentrations in Manila clams and Pacific oysters grown at commercial shellfish aquaculture sites versus reference beaches in coastal British Columbia, finding that proximity to aquaculture operations influenced microplastic levels in both bivalves and surrounding sediments.
Abundance and distribution of microplastics within surface sediments of a key shellfish growing region of Canada
Microplastics were found across all sediment size classes at shellfish farming sites in British Columbia, Canada, with higher concentrations in finer sediment fractions. The results raise concerns for the safety of bivalves grown in this region and for the broader health of one of Canada's most productive shellfish aquaculture areas.
Presence of microplastics in water, sediments and fish species in an urban coastal environment of Fiji, a Pacific small island developing state
Researchers conducted the first assessment of microplastic levels in surface water, sediments, and fish from the urban coastal environment of Suva, Fiji. The study confirmed the presence of microplastics across all three matrices in this Pacific small island developing state, and evaluated contributions from local sources including wastewater, highlighting that microplastic pollution affects even remote island nations.
Microplastic abundance, distribution and composition in the mid-west Pacific Ocean
Researchers surveyed microplastic abundance, distribution, and composition across the mid-west Pacific Ocean, an area with previously limited data, finding widespread contamination across sampled stations. The dominant particle types were fibers and fragments, with concentrations varying by location and depth.
Extensive Microplastic Contamination in Southeastern Florida Forage Fishes
Forage fish from four coastal sites in southeastern Florida contained high levels of microplastics, with contamination levels comparable to or exceeding those in larger predatory species, highlighting the importance of lower trophic levels as vectors for plastic in marine food webs.
Physical and anthropogenic drivers shaping the spatial distribution of microplastics in the marine sediments of Chilean fjords
Researchers examined microplastic distribution in marine sediments across 35 stations in Chilean Patagonian fjords. The study found microplastics in all samples, averaging 72.2 items per kilogram of dry sediment, with about 40% of the variability in distribution explained by ocean current velocity combined with proximity and intensity of local salmon farming activities.
Assessing the bioaccumulation of microplastics in commercially important fish species
Researchers assessed microplastic accumulation in commercially important fish species from coastal and offshore waters, finding significant differences between species based on feeding strategies and habitat depth. Filter feeders and omnivorous species accumulated more microplastics than others, reflecting diet-based differences across trophic levels. The study raises concerns about human dietary exposure to microplastics through widely consumed seafood products.
Distribution of Microplastics in Coastal Waters and Their Implications for the Marine Food Chain
Researchers sampled surface water, sediments, and marine organisms from urban, industrial, and conservation coastal zones in Indonesia to assess microplastic distribution and food chain implications. Industrial zones had the highest microplastic concentrations, and filter feeders accumulated more particles than fin fish, indicating distinct exposure pathways through the marine food web.
Low incidence of microplastic contaminants in Pacific oysters (Crassostrea gigas Thunberg) from the Salish Sea, USA
Researchers examined wild Pacific oysters (Crassostrea gigas) from the Salish Sea in Washington State and found a relatively low incidence of microplastic contamination, with approximately 63% of oysters containing microparticles at an average of about 1.75 particles per individual. The results suggest that microplastic burden in this commercially important shellfish may be lower than reported in more heavily polluted regions.
Microplastics in seawater and fish acquired from the corresponding fishing zones of the Baltic Sea
Microplastics were detected in 100% of seawater and 61% of fish samples collected from corresponding fishing zones of the Baltic Sea, with mean abundances of 19,984 items/m³ in seawater and 3.3 items per fish. The co-sampling design linking fish MP loads to their water column environment provided direct evidence of aquatic exposure driving tissue contamination.
Microplastic contamination in Auckland (New Zealand) beach sediments
Researchers conducted the first large-scale investigation of microplastic contamination in beach sediments across 39 sites in Auckland, New Zealand, finding contamination at the majority of beaches surveyed. Mean abundance varied by coastal environment type, with estuarine and harbour sites generally showing higher concentrations than open ocean beaches.
Comparative analysis of microplastic pollution in commercially relevant seafood across different geographical regions
Researchers analyzed microplastic pollution in commercially important seafood species, characterizing particle morphology and polymer composition across species. The study found microplastics in all species sampled, with differences in contamination levels linked to feeding ecology and habitat.
The concentration of microplastics compared to relative population proximity and basin residence times in Hood Canal and Whidbey Basin in Puget Sound, WA
This study measured microplastic concentrations in Hood Canal and Whidbey Basin in Puget Sound in relation to local human population density, finding higher plastic concentrations in more populated areas. The results reinforce that human activity is the primary driver of microplastic contamination in regional waterways.
Distribution and characterization of microplastics in marine sediments from coastal and offshore in South Korea
Researchers conducted an intensive survey of microplastic levels and distribution in marine sediments from coastal areas, recognizing the seafloor as the ultimate repository for plastic particles. Microplastic concentrations in sediments were highest near urban and industrial coastlines, with fibers and fragments as the most common types.
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.
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.
Presence of microplastics in benthic and epibenthic organisms: Influence of habitat, feeding mode and trophic level
This study examined microplastic occurrence in benthic and epibenthic invertebrates from the Western English Channel, finding that habitat type, feeding mode, and trophic level all influenced microplastic ingestion rates. The results suggest that bottom-dwelling filter feeders and deposit feeders are among the most exposed organisms in seafloor food webs.
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.