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Suspended microplastics in the surface water of the Yangtze Estuary System, China: First observations on occurrence, distribution
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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.
Levels of microplastics (MPs) in China are completely unknown. This study characterizes suspended MPs quantitatively and qualitatively for the Yangtze Estuary and East China Sea. MPs were extracted via a floatation method. MPs were counted and categorized according to shape and size under a stereomicroscope. The MP densities were 4137.3±2461.5 and 0.167±0.138 n/m(3), respectively, in the estuarine and the sea samples. Plastic abundances varied significantly in the estuary. Higher densities in three sea trawls confirmed that rivers were the important sources of MP to the marine environment. Plastic particles (>5mm) were observed with a maximum size of 12.46 mm, but MPs (0.5-5 mm) constituted more than 90% by number of items. The most frequent geometries were fibres, followed by granules and films. Plastic spherules occurred sparsely. Transparent and coloured plastics comprised the majority of the particles. This study provides clues in understanding the fate and potential sources of MPs.
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Distribution Characteristics of Microplastics in Surface Seawater off the Yangtze River Estuary Section and Analysis of Ecological Risk Assessment
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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.
[Distribution and Settlement of Microplastics in the Surface Sediment of Yangtze Estuary].
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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.
Seasonal dynamics, tidal influences, and anthropogenic impacts on microplastic distribution in the Yangtze River estuary: A comprehensive characterization and comparative analysis
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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.
Characteristics and distribution of microplastics in shoreline sediments of the Yangtze River, main tributaries and lakes in China—From upper reaches to the estuary
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Microplastic concentrations were measured in shoreline sediments from 54 sites along the Yangtze River, its tributaries, and adjoining lakes from the upper reaches to the estuary, revealing widespread contamination that generally increased toward the more urbanized lower river. The study provides one of the most spatially comprehensive surveys of Yangtze River microplastic pollution to date.
Small microplastic particles dominate Yangtze River particulate pollution
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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.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.