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61,005 resultsShowing papers similar to Occurrence and distribution of microplastics in freshwater aquaculture area with different culture modes in Yangtze River Delta of China
ClearOccurrence and distribution characteristics of aged microplastics in the surface water, sediment, and crabs of the aquaculture pond in the Yangtze River Delta of China
Researchers measured microplastic contamination in crab aquaculture ponds in China, finding particles in the water, sediment, and crab tissues. The crabs' intestines contained the most microplastics, followed by gills and liver, and contamination levels increased with body weight. Since these crabs are raised for human consumption, the study shows that farmed seafood can be a direct source of microplastic exposure for people.
Seasonal dynamics, tidal influences, and anthropogenic impacts on microplastic distribution in the Yangtze River estuary: A comprehensive characterization and comparative analysis
Researchers studied microplastic pollution in the Yangtze River estuary and found average concentrations of about 1 particle per cubic meter of surface water, mostly polystyrene, polypropylene, and polyethylene. Microplastic levels were nearly twice as high during flood season compared to dry season and decreased with distance from urban centers. These findings highlight how population density and seasonal water flow influence microplastic distribution in major waterways.
Occurrence and Characteristics of Microplastics Contamination in Different Intensive Aquaculture Systems Nearby the Yangtze Estuary, China
Researchers compared microplastic contamination across four types of aquaculture systems near China's Yangtze Estuary, finding that earthen ponds had the highest concentrations (13.81 particles/L) while recirculating aquaculture systems had the lowest, with fibers being the dominant shape in most settings.
Suspended microplastics in the surface water of the Yangtze Estuary System, China: First observations on occurrence, distribution
Researchers measured suspended microplastic concentrations in surface water across the Yangtze Estuary system in China, finding spatial gradients that reflected inputs from the Yangtze River and local coastal sources.
Distribution Characteristics of Microplastics in Surface Seawater off the Yangtze River Estuary Section and Analysis of Ecological Risk Assessment
Researchers surveyed microplastic contamination in surface seawater near the Yangtze River estuary across four seasons in 2017 and 2019. They found microplastics at all sampling stations, with abundance varying by season and influenced by river discharge and ocean currents. The study provides baseline data on microplastic pollution levels in this ecologically important estuarine region of China.
Occurrence of microplastic in the water of different types of aquaculture ponds in an important lakeside freshwater aquaculture area of China
Microplastics were detected in aquaculture pond water across an important freshwater aquaculture region in China, with pond type and cultured species influencing microplastic occurrence and composition.
Small microplastic particles dominate Yangtze River particulate pollution
Researchers conducted annual monitoring of plastic particle fluxes in the Yangtze River estuary, finding that small microplastic particles dominate particulate pollution and that their distribution varies significantly by location and season, with important implications for estimating riverine plastic inputs to the sea.
Observation of microplastics in mariculture water of Longjiao Bay, southeast China: Influence by human activities
A 9-month study of a shrimp mariculture farm in southeastern China found microplastic concentrations of 250–5,150 items/m³ in culture pond water, with seasonal variation and granules and fibers as dominant types — identifying aquaculture pond management practices as a driver of local MP levels.
Characteristics and risks of microplastic contamination in aquaculture ponds near the Yangtze Estuary, China
Researchers measured microplastic contamination in aquaculture ponds near the Yangtze River in China, finding an average of 36 particles per liter in water and 272 particles per kilogram in sediment. Polyethylene was the most common plastic type, and crab and prawn ponds had higher contamination than fish ponds. Since farmed seafood is a major food source, this contamination could be a pathway for microplastics to reach human diets.
Microplastics contamination in the surface water of the Yangtze River from upstream to estuary based on different sampling methods
A survey of microplastic contamination along the Yangtze River from source to estuary found average abundances of up to 4.25 × 10^5 items/km by trawling and up to 3,089 items/m³ by filtration, with the Three Gorges Reservoir showing the highest concentrations due to a dam barrier effect.
Small microplastic particles dominate Yangtze River particulate pollution
Annual field monitoring of microplastic fluxes in the Yangtze River estuary found that small particles dominated the plastic load and that abundance was spatially and temporally heterogeneous, providing the first systematic estimate of the river's annual plastic contribution to the ocean.
[Distribution and Settlement of Microplastics in the Surface Sediment of Yangtze Estuary].
Researchers found microplastics in surface sediments at six sites in China's Yangtze River estuary, with concentrations varying by location and season. The study documents significant plastic contamination in this major coastal zone, raising concerns about ecosystem health and entry of microplastics into the marine food web.
Comparison of microplastic pollution in different water bodies from urban creeks to coastal waters
Microplastics were surveyed across a gradient of water body types in the Yangtze Delta area—from city creeks to rivers, estuary, and coastal sea—finding higher concentrations in freshwater (1.8–2.4 items/L) than estuarine/coastal water (0.9 items/L) and a dilution gradient from urban to marine environments. The study provides systematic data on how microplastic concentrations change along the freshwater-to-ocean continuum in a densely urbanized region.
Dynamic signatures of microplastic distribution across the water column of Yangtze River Estuary: Complicated implication of tidal effects
Seasonal sampling of microplastic concentrations throughout the Yangtze River Estuary water column found tidal dynamics strongly influenced distribution, with researchers developing a model estimating 2154 tons per year of microplastic flux into the East China Sea and a tide impact factor index of 38-58%.
Microplastic pollution in the Yangtze River Basin: Heterogeneity of abundances and characteristics in different environments
Researchers compiled microplastic data from 624 sampling sites across the Yangtze River Basin covering water, sediment, soil, and biota, revealing heterogeneous contamination patterns driven by local land use, population density, and wastewater infrastructure.
Occurrence and fate of microplastic debris in middle and lower reaches of the Yangtze River – From inland to the sea
A large-scale survey along the middle and lower Yangtze River found microplastics throughout the water column and sediments, with concentrations increasing toward the river mouth and a clear trend of microplastics moving from inland sources toward the sea. The study provides field evidence for rivers as major pathways for microplastic transport from land to ocean.
Characteristics and Distribution of Microplastics in Shoreline Sediments of the Yangtze River, Main Tributaries and Lakes in China—From Upper Reaches to the Estuary
Scientists measured microplastic concentrations in sediments along 54 sites spanning the Yangtze River system in China, from the upper reaches to the estuary. Microplastics were found throughout, with higher concentrations near urban and industrial areas, showing how large rivers distribute plastic pollution across vast distances.
Abundance, Composition, and Potential Ecological Risks of Microplastics in Surface Water at Different Seasons in the Pearl River Delta, China
Researchers measured microplastic abundance, composition, and ecological risk in surface water of the Pearl River Delta across different seasons, finding spatially uneven distribution with some sites showing far higher concentrations than others. Ecological risk scores were highest at sites near industrial zones and dense urban areas.
Variations in microplastic pollution characteristics among different aquaculture modes: A case study from Dongting Lake area, China
A study of four aquaculture modes in China's Dongting Lake region found microplastics in all water and aquatic organism samples, with swamp eel ponds having the highest contamination and advanced ecological/facility systems showing notably lower levels. The findings are important for food safety because edible aquatic species across all farming methods were exposed to microplastics, with tailwater continuing to export contamination even from cleaner facilities.
Spatial and temporal distribution characteristics of microplastics in surface water of typical shallow lake in the middle and lower reaches of Yangtze River: A case study of Lake Baoan, Hubei Province
A seasonal sampling campaign at Lake Baoan, a shallow Yangtze River basin lake in China, found an average microplastic abundance of about 16 particles per litre in surface water, with fibers making up 40% of particles and polyethylene the dominant polymer. Microplastic concentrations peaked in winter and were lowest in summer, but showed no significant correlation with conventional water-quality indicators — suggesting that standard water-quality monitoring will miss microplastic contamination.
How the Yangtze River transports microplastic to the east China sea
Researchers used interpolation and input-output modeling to estimate how the Yangtze River transports microplastics seasonally from land to the East China Sea, finding that MP loads varied substantially by month with peak transport during high-flow periods. Tributary contributions and agricultural runoff were identified as major factors controlling MP flux to the estuary.
[Distribution Characteristics of Microplastics and Their Migration Patterns in Xiangxi River Basin].
Researchers examined the spatial and temporal distribution of microplastics in the surface water, sediments, and subsidence zones of the Xiangxi River, a tributary of the Yangtze River, sampling in November 2020 and April 2021. They found average microplastic abundances of 6.64 n/L in flat water and 5.00 n/L in flowing water, identifying distinct migration patterns between seasons and environmental compartments.
Characteristics of microplastic pollution and analysis of colonized-microbiota in a freshwater aquaculture system.
Researchers found microplastics averaging 288.53 items per liter in freshwater aquaculture ponds in China, dominated by transparent fibers and cellulose particles, and discovered that bacterial communities on microplastic surfaces had significantly higher species richness and diversity than those in surrounding water. The plastisphere communities were enriched with Proteobacteria, including cellulose-degrading and potentially pathogenic species.
Variation in microplastics composition at small spatial and temporal scales in a tidal flat of the Yangtze Estuary, China
Researchers investigated microplastic variation at small spatial and temporal scales in a tidal flat of the Yangtze Estuary, finding that surface sediments had higher microplastic abundances during neap tides than spring tides, and that vegetation zones had distinct microplastic composition compared to bare mudflat areas.