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61,005 resultsShowing papers similar to First record of microplastic contamination in adult endemic amazonian anuran species
ClearDistribution of microplastics in tadpoles, adults, and habitats of three water frogs of Pelophylax spp.
Researchers examined microplastics in water frogs and their habitats across Turkey, finding that while tadpoles showed almost no microplastic ingestion, 44% of adult frogs had microplastics in their digestive tracts — mostly fibers from synthetic textiles. The findings highlight how microplastic contamination increases with life stage and proximity to human activity, threatening amphibian populations already under environmental stress.
Spatiotemporal distribution of microplastics in true frogs (Ranidae:Pelophylax) populations from Türkiye
Researchers examined preserved frog stomach contents from 146 true frogs collected across Turkey and found microplastics in nearly 60% of individuals, with plastic fibers being the most common form. The findings show that frogs — which live both in water and on land — are useful indicators of microplastic contamination across multiple ecosystems, and that exposure has been occurring for decades.
Microplastics as an emerging threat to amphibians: Current status and future perspectives
This review summarizes existing research on microplastic contamination in amphibians like frogs and salamanders, finding that over 80% of studied species had accumulated microplastics. The particles persisted in organs, showed toxic and gene-damaging effects, and could transfer through the food chain. Since amphibians are indicators of environmental health, widespread microplastic accumulation in these animals signals broader ecosystem contamination that can ultimately affect human food and water sources.
First evidence of microplastic ingestion by fishes from the Amazon River estuary
Researchers documented the first evidence of microplastic ingestion by fish in the Amazon River estuary, finding plastic particles — predominantly polyamide and polyethylene pellets — in 30% of 189 specimens across 14 species, with larger fish containing more particles, indicating widespread contamination extending into one of the world's most biodiverse river systems.
Identifying the presence of microplastics in frogs from the largest delta of the world
Researchers found microplastics in 90% of frogs collected from nine species across the Bengal delta, with fibers being the most common type — indicating that amphibians in this major river system are heavily exposed to plastic pollution, which may contribute to their global population decline.
Occurrence of microplastics in the gastrointestinal tract of Amazonian fish species with different feeding habits
Microplastics were found in the gastrointestinal tracts of multiple Amazonian fish species with different feeding habits from Lake Janauacá and the Anavilhanas Archipelago, with feeding strategy influencing ingestion rates—underscoring widespread microplastic contamination even in remote Amazon basin aquatic ecosystems.
Large-scale monitoring and risk assessment of microplastics in the Amazon River
Researchers conducted the largest microplastic monitoring study in the Amazon River, sampling 40 sites across 1,500 kilometers. Microplastics were found everywhere, with urban streams near cities showing concentrations up to 1,000 times higher than the main river. This study confirms that even remote freshwater ecosystems like the Amazon are contaminated with microplastics, which could affect the fish and water that local communities depend on.
Microplastic prevalence in anatolian water frogs (Pelophylax spp.)
Researchers found microplastics in the tissues of anatolian water frogs (Pelophylax spp.) collected from freshwater habitats in Turkey, documenting prevalence and characteristics of plastic particles in these amphibians whose populations are already stressed by multiple environmental pressures.
Hazard assessment of microplastics and heavy metals contamination in Levant frogs (Pelophylax bedriagae): A bioindicator in Western Iran
Scientists examined frogs from 16 locations in western Iran and found microplastics and heavy metals in their digestive tracts, confirming these animals are useful indicators of environmental contamination. Fibers were the most common microplastic type found, mainly from polyethylene and polypropylene. The study shows that microplastic pollution has reached freshwater habitats in Iran and is being ingested by amphibians that are part of broader food webs.
Variation in microplastic characteristics among amphibian larvae: a comparative study across different species and the influence of human activity
Scientists examined microplastics inside amphibian larvae from 10 species and found plastic particles in all of them, with blue fibers being the most common type. Larger larvae tended to contain longer plastic fragments, and there was a relationship between human activity levels near habitats and the characteristics of the plastics found. This study shows that microplastic contamination has penetrated freshwater food webs, affecting animals during their most vulnerable developmental stages.
Microplastic occurrence in fish species from the Iquitos region in Peru, western Amazonia
Researchers surveyed microplastic contamination in 61 fish from 15 commercial species in the Peruvian Amazon near Iquitos. The study found microplastics in 100% of sampled fish, with an average of 38.3 particles per individual detected across gills and internal organs, demonstrating that microplastic pollution has reached even remote areas of the western Amazon basin.
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.
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.
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.
Impacts and transport of microplastics: Population dynamics in frogs and the transfer between aquatic and terrestrial ecosystems
Researchers studied how microplastics affect the development and survival of Japanese tree frogs and how frogs may transport plastics from water to land. They found that microplastic exposure did not significantly alter hatching or survival rates but did affect growth patterns. The study also demonstrates that as frogs metamorphose and move onto land, they carry ingested microplastics with them, creating a previously underappreciated pathway for plastic pollution to spread between ecosystems.
Microplastic pollution and amphibian health: Complex physiological effects of different microplastic types on juvenile Glandirana rugosa
Researchers studied how polypropylene and polyethylene microplastics affect juvenile frogs and found significantly higher mortality rates in microplastic-exposed groups. The frogs showed elevated stress hormones, signs of oxidative damage, and elongated intestines, suggesting their bodies were trying to adapt to the particles. The study highlights that microplastics pose both physical and chemical risks to amphibians, which may contribute to population declines.
Microplastics Occurrence in the European Common Frog (Rana temporaria) from Cottian Alps (Northwest Italy)
Adult European common frogs (Rana temporaria) from high-mountain sites in the Cottian Alps of northwest Italy were found to contain plastic particles in their gastrointestinal tracts, representing one of the first records of microplastic ingestion in this species from an alpine ecosystem. The study demonstrates that plastic contamination has penetrated even remote mountain amphibian populations far from direct human plastic sources.
Micro(nano)plastics as an emerging risk factor to the health of amphibian: A scientometric and systematic review
Only 12 studies have examined microplastic effects on amphibians, concentrated in Brazil and China and limited mostly to the Anura order; lab-tested concentrations were far from environmentally relevant levels, leaving significant knowledge gaps about mechanisms of toxicity in this vertebrate group.
Contamination of stream fish by plastic waste in the Brazilian Amazon
Researchers evaluated plastic contamination in small fish from Amazonian headwater streams in Brazil, finding widespread plastic pollution in these understudied tropical freshwater ecosystems and characterizing the shapes, sizes, and abundance of plastic items ingested.
Combined contamination of microplastics and heavy metals in a riverine ecosystem: insights from fish and amphibian species
Researchers conducted the first simultaneous evaluation of microplastics and heavy metals in both freshwater fish and amphibians from the Seimareh River in western Iran. They found that amphibians ingested about 9% more microplastic particles than fish, and strong correlations between microplastic abundance and certain metals like lead, cadmium, and arsenic suggest that microplastics may enhance metal bioavailability. The study identifies amphibians as particularly sensitive indicators of combined pollution from microplastics and heavy metals.
Life on both environment in semi-aquatic frogs: Impact of aquatic microplastic (MP) from MP enrichment to growth, immune function and physiological stress
Researchers exposed juvenile black-spotted pond frogs to different concentrations of microplastics in water to study effects after metamorphosis. They found that microplastics accumulated primarily in the digestive tract and caused reduced growth, increased stress markers, and weakened immune function at higher concentrations. The study suggests that microplastic pollution in freshwater habitats could pose significant health risks to amphibians during vulnerable life stages.
Microplastic contamination and ecological risk assessment in two tree frog species (Hyla orientalis and Hyla savignyi) across Türkiye
Researchers examined microplastic contamination in the gastrointestinal tracts of two tree frog species across 24 provinces in Turkiye. The study found 192 microplastic particles total, predominantly PET fibers, with significant geographic variation in contamination levels and microplastic characteristics, suggesting widespread environmental distribution of microplastic pollution across the region.
First Evidence of Microplastic Ingestion by an Arboreal Primate
Researchers documented the first evidence of microplastic ingestion by an arboreal primate, finding green-colored plastic fiber filaments in the stomachs of two red howler monkeys in the central Amazon. The microplastics likely originated from decomposing ghost nets deposited on trees during seasonal flooding. The findings underscore that microplastic contamination has reached even remote forest-dwelling wildlife far from urban centers.
Plastic Waste in the Amazon Forest: What Is the Future of the Ecosystem Services Provided by the Local Bats?
This study is the first to report microplastic contamination in Amazonian bats, finding that 95% of 81 bats from 25 species had microplastic fibers in their digestive or respiratory systems. The digestive system was more contaminated than the respiratory tract, indicating ingestion through contaminated food and water as the primary exposure route. The finding shows that microplastic pollution has reached one of the most biodiverse ecosystems on Earth and is affecting mammals that provide critical ecosystem services such as insect control and pollination.