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61,005 resultsShowing papers similar to A non-invasive method of microplastics pollution quantification in green sea turtle Chelonia mydas of the Mexican Caribbean
ClearIngestion of microplastic debris by green sea turtles (Chelonia mydas) in the Great Barrier Reef: Validation of a sequential extraction protocol
Researchers developed and validated a sequential extraction protocol for recovering microplastics from green sea turtle intestinal contents, finding microplastics in turtles from the Great Barrier Reef. The validated method enables more consistent and accurate assessment of microplastic contamination in sea turtles, which are both ecologically important and frequently exposed to marine debris.
Widespread microplastic pollution across the Caribbean Sea confirmed using queen conch
Researchers confirmed widespread microplastic pollution across eleven Caribbean Sea sites using fecal samples from queen conch as a non-lethal biomonitoring method, finding plastic particles in all locations and documenting contamination throughout this biodiversity-rich marine ecosystem.
Monk seal faeces as a non-invasive technique to monitor the incidence of ingested microplastics and potential presence of plastic additives
Researchers used a non-invasive technique to collect and analyze monk seal fecal samples for microplastic contamination, marking the first time this approach has been used for this endangered species. They found microplastic particles in the samples along with plastic additives and biomarkers indicating dietary exposure. The method offers a practical way to monitor microplastic ingestion in protected marine mammals without disturbing the animals.
Plastic pollution and health metrics in wild juvenile green sea turtles (Chelonia mydas) from two Ecuadorian national parks: Galápagos and Machalilla
Researchers examined wild juvenile green sea turtles from two Ecuadorian national parks to assess plastic pollution in their feces and its relationship to health metrics. Using infrared spectroscopy, they identified various plastic polymers in fecal samples from both the Galapagos and Machalilla populations. The study provides evidence that plastic ingestion is widespread among young sea turtles, even in protected marine areas.
Microplastic Occurrence in the Diet of Green Sea Turtles (Chelonia mydas) From the Coastal Region of São Paulo, Brazil
Researchers analyzed the gastrointestinal contents of 218 green sea turtles from the coast of Sao Paulo, Brazil, and detected microplastics in nearly 46% of samples. Microplastics were found in 75% of samples from the more urbanized central-south coast compared to 35% from the northern coast, suggesting that proximity to human activity significantly influences microplastic ingestion rates in marine wildlife.
Validation of an optimised protocol for quantification of microplastics in heterogenous samples: A case study using green turtle chyme
This paper developed and validated an optimized protocol for extracting and quantifying microplastics from the gut contents of marine organisms. Having a reliable, standardized method is essential for generating consistent data on microplastic ingestion across different species and studies.
Microplastic ingestion ubiquitous in marine turtles
Researchers examined over 100 marine turtles across all seven species and found synthetic particles in every single individual tested. The study suggests that microplastic ingestion is ubiquitous across marine turtle species, regardless of geographic location or life stage, raising broad concerns about plastic contamination in large marine vertebrates.
Microplastic Distribution Characteristics and Sources on Beaches That Serve as the Largest Nesting Ground for Green Turtles in China
Researchers characterized microplastic distribution and sources on beaches of the Qilianyu Islands, China's largest remaining green turtle nesting grounds, finding significant contamination despite the islands' remote location. The study identified microplastic hotspots that could threaten turtle nesting success and hatchling health.
Using a non‐invasive technique to identify suspected microplastics in grey seals ( Halichoerus grypus ) living in the western North Sea
Faecal samples from living wild grey seals in the western North Sea were analyzed for suspected microplastics, representing the first non-invasive record of microplastic exposure in this wild pinniped population. The study demonstrates that faecal analysis can provide indirect evidence of microplastic ingestion in free-ranging marine mammals without requiring capture or euthanasia.
The microplastic pollution in beaches that served as historical nesting grounds for green turtles on Hainan Island, China
Researchers found an average of 2,567 microplastic pieces per square meter in beach sediments at historical green turtle nesting grounds on Hainan Island, China, with polystyrene and polyethylene foam fragments dominating and small particles (0.05-1 mm) most prevalent, raising concerns about nesting habitat quality.
A methodology for the sampling and identification of microplastics in bird nests
Researchers developed and tested a green (chemical-free) method to extract and identify microplastics from bird nests, finding an average of 250 microplastic items per nest in urban Great-tailed grackle nests, mostly synthetic polyethylene and polypropylene fibers. Bird nests offer a practical, non-invasive way to monitor microplastic contamination in urban and terrestrial environments.
Microplastic Pollution in Sea Turtle Nests on the Beaches of Nautla and Vega de Alatorre, Veracruz
Researchers assessed microplastic pollution in sea turtle nesting beaches in Veracruz, Mexico, documenting contamination levels and types that could alter sand properties and negatively affect turtle egg incubation conditions.
Endoscopy and rectal enema for fecal collection in wild sea turtles (Chelonia mydas, Eretmochelys imbricata) in a field setting
Researchers developed and tested an endoscopy-assisted rectal enema method for collecting large fecal samples from wild sea turtles for environmental exposure research. Sea turtles regularly ingest microplastics mistaking them for food, and improved fecal sampling methods allow better assessment of their plastic ingestion levels.
Plastic contamination of a Galapagos Island (Ecuador) and the relative risks to native marine species
Researchers conducted a comprehensive survey of plastic contamination across the marine ecosystem of a Galapagos island — covering beaches, water, sediment, and invertebrates — and found widespread contamination including in native species, identifying dominant sources and risk levels for key marine animals.
A global assessment of microplastic abundance and characteristics on marine turtle nesting beaches
Researchers coordinated a global sampling effort across 209 marine turtle nesting beaches in six ocean basins to assess microplastic contamination in beach sediments. They found microplastics present on 45% of beaches, with the Mediterranean showing the highest contamination rate at 80%. The study provides an open-access dataset to support ongoing monitoring of plastic pollution in critical nesting habitats.
Microplastics on Beaches in the Nautla-Vega de Alatorre Turtle Nesting Area, Veracruz
Researchers characterized microplastics (1-5 mm) on five beaches along a 15.5 km sea turtle nesting area in Veracruz, Mexico, sampling the intertidal zone to assess contamination levels and potential sources. The study found microplastic presence across all surveyed beaches in a region used by green and Kemp's ridley turtles, raising concerns about plastic exposure risks to nesting and hatchling sea turtles.
Microplastics in Small Ruminants II
Researchers examined 100 fecal samples from goats in Manabí Province, Ecuador, finding microplastic contamination in all samples and identifying the specific plastic types using two laboratory processing methods.
Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status
Researchers developed a standardized protocol for collecting and analyzing marine litter ingested by sea turtles, providing methodology for extracting and quantifying litter items from dead turtles to fulfill EU Marine Strategy Framework Directive requirements for assessing Good Environmental Status.
A review on microplastics in mammalian feces: Monitoring techniques and associated challenges
Researchers reviewed how microplastics appear in the feces of humans, dogs, cats, and marine mammals, finding PET plastic to be the most common type across species. Analyzing feces offers a non-invasive way to track how much plastic organisms are ingesting, which could help guide environmental health policies.
Garbage in guano? Microplastic debris found in faecal precursors of seabirds known to ingest plastics
Microplastics including fibers and fragments were detected in faecal precursors (pellets) from seabirds known to ingest plastics, providing non-lethal evidence of plastic ingestion that could be used in monitoring programs. The method offers a practical way to assess plastic ingestion in protected seabird species without requiring destructive sampling.
Microplastic Extraction from Marine Vertebrate Digestive Tracts, Regurgitates and Scats: A Protocol for Researchers from All Experience Levels
This paper presents a standardized protocol for extracting and identifying microplastics from the digestive systems of marine vertebrates (mammals, birds, turtles, and fish). Having consistent, accessible methods is essential for generating comparable data on how much plastic wildlife across different species and regions are ingesting.
Towards the suitable monitoring of ingestion of microplastics by marine biota: A review
This review assessed various monitoring methods for detecting microplastic ingestion by marine biota, comparing laboratory and field-based approaches. The authors recommend method selection based on organism type and research question and call for more consistent reporting standards to enable cross-study comparison.
Microplastic pollution on sandy beaches of Puerto Rico
Researchers sampled sand from six northern beaches of Puerto Rico to determine microplastic abundance and composition, documenting the extent of microplastic pollution on Caribbean island coastal beaches that are considered biodiversity hotspots.
Occurrence, Distribution, and Extraction Methods of Microplastics in Marine Organisms
This review synthesizes global data on microplastic occurrence and distribution across marine organisms, comparing the advantages and limitations of different extraction and identification methods used in the field.