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61,005 resultsShowing papers similar to Microplastic abundance and composition along an anthropogenic pressure gradient in an Andean river (Colombia)
ClearMicroplastics and other anthropogenic particles contamination and their potential trophic transfer in a tropical Andean reservoir, Colombia
Researchers assessed microplastic contamination across water, sediment, and aquatic organisms in a tropical Andean reservoir in Colombia, finding plastic particles present in all environmental compartments and at every level of the food chain studied. The most common particles were fibers and fragments made of polyethylene, polypropylene, and polyester. The study provides evidence that microplastics are being transferred up through the food web in this freshwater ecosystem, from tiny crustaceans to fish.
Occurrence of microplastics in Fish from Mendoza River: First Insights into Plastic Pollution in the Central Andes, Argentina
Researchers found microplastics in the gastrointestinal tracts of all three fish species examined from Argentina's Mendoza River in the Central Andes, with fibers comprising 85% of particles, marking the first evidence of microplastic pollution in this high-altitude freshwater system.
Microplastics and other anthropogenic particles contamination and its potential trophic transfer in a tropical Andean reservoir, Colombia
Researchers sampled water, sediment, and multiple trophic levels of biota in a tropical Andean reservoir in Colombia, finding microplastics and other anthropogenic particles at every level and documenting evidence of trophic transfer from zooplankton through macroinvertebrates to fish.
Microplastics in tropical Andean rivers: A perspective from a highly populated Ecuadorian basin without wastewater treatment
Researchers measured microplastic concentrations in a highly populated Ecuadorian river basin that lacks wastewater treatment, finding contamination throughout the system and demonstrating that rivers in low-income tropical countries with poor infrastructure are major conduits for microplastics.
Microplastics in river sediments in two streams in an Andean region of Peru
Researchers measured microplastic concentrations in surface sediments from two Andean streams in Peru, finding levels ranging from 0-2,216 items/kg in Ishoj stream and 0-6,383 items/kg in Uyru Rume stream, with highest concentrations near solid waste dumping sites. Fragments smaller than 1 mm dominated, polypropylene was the most common polymer by Raman analysis, and all particles were secondary microplastics.
Microplastics in water and fish of commercial interest: Distribution and relation to ecology in the colombians caribbean region, south america
Researchers evaluated microplastic contamination in surface waters and the gastrointestinal tracts of commercially important and invasive fish species along the Colombian Caribbean coast and San Andrés Island, examining the relationship between microplastic distribution and species ecology and geography.
Microplastics in water and fish of commercial interest: Distribution and relation to ecology in the colombians caribbean region, south america
Researchers evaluated microplastic contamination in surface waters and the gastrointestinal tracts of two commercially important fish species and one invasive species along the Caribbean coast of Colombia's Atlantico department and San Andres Island, relating distribution patterns to the ecology and geographic range of each species.
Estudio de microplásticos en muestras de agua y sedimentos de un río urbano del suroccidente de Colombia
A study of a Colombian urban river found microplastics in all water and sediment samples, with concentrations reaching 4,186 particles per liter in water and 62,763 per kilogram in sediments, and human activity along the riverbank directly correlated with contamination levels. This adds to evidence that urban rivers act as major conduits channeling microplastics from cities into the ocean.
Estudio de microplásticos en muestras de agua y sedimentos de un río urbano del suroccidente de Colombia
Microplastics were detected in both water and sediment samples from the Molino River flowing through Popayán, Colombia, with fibers and fragments being the most common forms found in this urban waterway.
Methods to characterize microplastics: case study on freshwater fishes from a tropical lagoon in Colombia
Fish from Colombia's Luruaco Lagoon contained microplastics with prevalence, abundance, and polymer characteristics analyzed across four sampling events, with principal component analysis linking MP types to feeding ecology and habitat use of the different species.
Methods to characterize Microplastics: Case study on freshwater fishes from a tropical lagoon in Colombia
Researchers examined microplastic prevalence, abundance, and physical and chemical characteristics in fish from Luruaco lagoon, Colombia, conducting four sampling events using trawl nets and analyzing gastrointestinal tracts of captured individuals to characterize microplastic ingestion across species.
Microplastic pollution differences in freshwater river according to stream order: Insights from spatial distribution, annual load, and ecological assessment
Researchers compared microplastic pollution levels in a freshwater river across different land-use zones, finding higher concentrations near urban and agricultural areas than in forested regions. Fiber-type microplastics were predominant across all sampling locations.
Habitat Integrity and Microplastic Contamination in Amazonian Streams: Assessment of Water, Sediment, and Fish and Identification of Predominant Polymers
Researchers assessed microplastic contamination in Amazonian streams by sampling water, sediment, and fish, and characterised predominant polymer types, finding that contamination was widespread across all environmental compartments regardless of habitat integrity, suggesting that even well-preserved stream habitats are not protected from microplastic pollution.
Widespread microplastic ingestion in Colombian Caribbean marine fish: Trophic influence, spatial-temporal trends, and polymer composition
Researchers examined three commercially important fish species from the Colombian Caribbean and found microplastics in over 82% of individuals across both continental and island waters. Fiber and fragment shapes were the most common types, with higher concentrations found in coastal areas and during the wet season. The findings suggest that microplastic ingestion is widespread among Caribbean fish, with potential implications for seafood consumers in the region.
Microplastic occurrence in fish species from the Iquitos region in Peru, western Amazonia
Researchers found microplastics in 15 commercial fish species from markets in the Peruvian Amazon, detecting 2,337 particles across 61 specimens — among the first reports of microplastic contamination in fish from the Amazon basin.
Impact of contamination due to ingestion of microplastics on commercial fish in relation to their trophic habits
Researchers evaluated the ingestion of microplastics by 28 Sciaenidae and 12 Ariidae fish species from estuaries in Tumaco and Buenaventura Bay, Colombia, examining stomach contents of 1,652 specimens across high and low precipitation seasons in 2020-2021 and analyzing how trophic level and other biological characteristics influence microplastic uptake.
Microplastics in fishes in amazon riverine beaches: Influence of feeding mode and distance to urban settlements
Researchers found microplastics in the digestive tracts of 29 fish species from Amazon riverine beaches, with contamination levels influenced by fish feeding mode and distance to urban settlements within a protected area.
Microplastics prevalence in water, sediment and two economically important species of fish in an urban riverine system in Ghana
Microplastics were detected in water, sediment, and two commercially important fish species from an urban river system in Ghana, with fiber being the dominant type across all matrices. The study represents one of the first assessments of freshwater microplastic contamination in West Africa and highlights urban river systems as major pathways for plastic transport.
Characteristics, abundance, distribution, and degradation dynamics of microplastics in the high Colca-Chilli water transfer systems: Tracing an emergent pollutant to Andean reservoirs
Researchers characterized microplastic presence, distribution, and weathering state in four high-altitude Andean reservoirs in Peru's Colca-Chilli system, finding microplastics in all sites with UV degradation and wind transport as major factors shaping contamination.
Occurrence and characterization of microplastic content in the digestive system of riverine fishes
Researchers found microplastics in 93.8% of riverine fish examined, with polystyrene, polyethylene, and nylon being the most common polymer types concentrated near urban and industrial areas, and small particles (0.025-1 mm) predominating across species.
Microplastic in upper Himalayan Ganga river: Occurrence, seasonal dynamics and ecological risk
Researchers quantified microplastics at 19 sites across the upper Himalayan Ganga River over six months, finding concentrations of 100–1,550 particles per liter in water and rising contamination levels downstream toward densely populated cities, with fibers, polyethylene, and post-monsoon conditions dominating the pollution profile.
Far from urban areas: plastic uptake in fish populations of subtropical headwater streams
This study found plastic fibers in 38% of fish from remote subtropical headwater streams far from urban areas in Brazil, with fibers making up the fourth most common item in fish stomachs. The results suggest that even in sparsely populated landscapes, microplastic contamination of freshwater ecosystems is widespread.
Impact of Microplastic Fibers from the Degradation of Nonwoven Synthetic Textiles to the Magdalena River Water Column and River Sediments by the City of Neiva, Huila (Colombia)
Researchers sampled surface water and shoreline sediments of the Magdalena River in Neiva, Colombia to assess microplastic contamination from agricultural and municipal sources, finding increasing microplastic concentrations downstream with microfibers ranging from 0.097-0.135 fibers per liter in surface water. Raman and SEM analyses identified polypropylene and polyethylene as comprising at least 75% of all polymers, with fiber widths under 20 micrometers indicating degradation of nonwoven synthetic textiles as the dominant source.
Prevalence of microplastics in commonly consumed fish species of the river Old Brahmaputra, Bangladesh
Researchers found microplastics in nearly 59% of edible fish from Bangladesh's Old Brahmaputra river, with polyethylene fibers and pellets dominating, and ingestion rates linked to fish size, feeding behavior, and downstream location.