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20 resultsShowing papers similar to Seasonal variation in the abundance of marine plastic debris in the estuary of a subtropical macro-scale drainage basin in South China
ClearMicroplastics in Hong Kong's marine waters: Impact of rainfall and Pearl River discharge
Researchers systematically tracked microplastic levels in Hong Kong's coastal waters from 2019 to 2021 and found that seasonal rainfall was a much bigger driver of contamination than pandemic-related factors like mask use. Microplastic abundance was significantly higher during the wet season, with surface runoff from rain carrying land-based pollution into the ocean. Sites closer to the Pearl River Delta had the highest levels, indicating that river discharge is a major source of marine microplastic contamination in the region.
Abundance and variation of microplastics between seasons in a tropical estuary: The case of Can Gio estuary, Vietnam
Researchers assessed seasonal variation in microplastic abundance and characteristics in the Can Gio estuary, Vietnam, across wet and dry seasons. Microplastic concentrations were higher during the wet season, with seasonal plastic transport linked to river discharge and rainfall-driven inputs from upstream urban sources.
Spatio-temporal comparison of neustonic microplastic density in Hong Kong waters under the influence of the Pearl River Estuary
Spatial and temporal surveys of microplastic density in Hong Kong surface waters found elevated concentrations near the Pearl River Estuary and seasonal variation linked to river discharge. The study provides empirical evidence that river outflow from China's Pearl River is a significant driver of coastal microplastic distribution in Hong Kong waters.
Seasonal variations in the abundance and distribution of small-sized microplastics in Hong Kong's marine waters
A study of Hong Kong marine waters found that small microplastics (20–300 μm), which are typically missed by standard trawl sampling, are present at concentrations far higher than larger microplastics, with seasonal peaks during the wet season linked to runoff. This finding reveals a major gap in how microplastic pollution in coastal waters is currently measured and potentially underestimated.
Anthropogenic debris pollution in peri-urban mangroves of South China: Spatial, seasonal, and environmental drivers in Hong Kong
A seasonal survey of peri-urban mangroves across Hong Kong found that plastic was the dominant type of anthropogenic debris, accumulating more heavily in landward zones and during the dry season. The study identified mismanaged land-based waste — rather than river inputs from the Pearl River — as the primary source, underscoring the role of urban waste management failures in threatening mangrove ecosystems. Mangroves are ecologically important nursery habitats, and chronic plastic debris smothers roots and disrupts biodiversity.
Seasonal microplastic variations in estuarine sediments from urban canal on the west coast of Thailand: A case study in Phuket province
Researchers investigated seasonal variations in microplastic contamination in estuarine sediments from an urban canal in Phuket, Thailand. They found microplastic abundance was higher in the dry season than the rainy season, with rayon and polyester being the most common polymer types, suggesting that seasonal hydrological patterns and human activities both influence microplastic distribution in urban estuaries.
Temporal and Spatial Distribution of Microplastics in a Coastal Region of the Pearl River Estuary, China
Researchers found that microplastic abundance in the Pearl River Estuary coastal region was 1.85-fold higher during the rainy season than the dry season, with concentrations decreasing from river to estuary to open sea. Fibers and fragments dominated, with gray, white, and green particles most common across sampling sites.
Microplastic pollution in the marine waters and sediments of Hong Kong
Seasonal surveys of surface water and sediments across four coastal locations in Hong Kong found microplastics at all sites, with the highest concentrations in the most urbanized harbor areas. This first comprehensive study of Hong Kong coastal waters reveals that even heavily trafficked port environments accumulate large quantities of microplastic pollution.
Microplastics in Marine Sediments in Eastern Guangdong in the South China Sea: Factors Influencing the Seasonal and Spatial Variations
This study investigated seasonal variation in microplastic abundance in marine sediments across multiple-use zones of Eastern Guangdong in the South China Sea, finding that seasonal and spatial patterns were influenced by hydrodynamic conditions, rainfall, and proximity to human activity.
Microplastic inputs to the Mediterranean Sea during wet and dry seasons: The case of two Lebanese coastal outlets
Sampling of two Lebanese rivers found that microplastic concentrations were far higher in the more urbanized and industrialized river, and that plastic particle loads spiked at the start of the wet season before declining as rain continued—suggesting that seasonal stormwater flushes pulse large amounts of microplastics into the Mediterranean Sea. These results underscore how urban land use and seasonal weather patterns together control the flow of plastic pollution from land to sea.
Seasonal variations in microplastic distribution on Macau’s windward and leeward beaches: weak spatial autocorrelation
A seasonal study of beaches in Macau found that microplastic abundance varied between windward and leeward shores and changed across seasons, with wind direction and precipitation identified as key factors controlling where MPs accumulate and in what quantities.
Influence of seasonal variations on the distribution characteristics of microplastics in the surface water of the Inner Gulf of Thailand
Researchers sampled surface water across 70-74 sites in the Inner Gulf of Thailand in both dry and wet seasons, finding microplastic concentrations 4 times higher in the wet season (34.59 pieces/L) than the dry season (8.70 pieces/L). River discharge was identified as the key driver of microplastic input to the coastal sea, and polypropylene and polyethylene were the dominant polymers.
Microplastics discharged from urban drainage system: Prominent contribution of sewer overflow pollution
Researchers evaluated the abundance and distribution of microplastics in urban drainage systems in coastal Chinese cities, with a focus on sewer overflow events during storms. The study found that overflow pollution during wet weather is a prominent contributor to microplastic discharge into urban water bodies, with meteorological conditions and land use patterns significantly influencing microplastic transport and release.
Microplastics and plastisphere at surface waters in the Southwestern Caribbean sea
Researchers surveyed microplastic pollution at the surface waters of two marine-coastal areas in the Southwestern Caribbean Sea across wet and dry seasons. The study found higher microplastic concentrations during the rainy season, likely due to increased runoff carrying land-based plastic waste into the ocean. Evidence indicates that seasonal weather patterns and local land use significantly influence microplastic distribution in coastal marine environments.
Changes in Sources and Composition of Beach Waste in Coastal Cities around the Bohai Sea of China during the Tourist Peak and Off-Peak Seasons
Researchers surveyed beach waste across twenty beaches in thirteen cities around China's Bohai Sea during tourist peak and off-peak seasons, finding large quantities of plastic-dominated waste with significant seasonal variation linked to tourism and local activities.
Impacts of extreme weather events on microplastic distribution in coastal environments
Researchers conducted a year-long survey in Hong Kong to study how extreme weather events affect microplastic distribution in coastal environments. They found that typhoons and rainstorms dramatically increased microplastic levels, with abundance jumping 5 to 36 times higher after major storms. The study suggests that extreme weather is the primary driver of seasonal variation in coastal microplastic pollution, which has implications as these events become more frequent.
Seasonal variation of diversity, weathering, and inventory of microplastics in coast and harbor sediments
Seasonal variation in microplastic diversity, weathering degree, and abundance was characterized in coastal and harbor sediments along the southwestern coast of Taiwan, finding harbor sites more contaminated than coastal areas and summer monsoon rains driving seasonal fluctuations.
Major sources and monthly variations in the release of land-derived marine debris from the Greater Jakarta area, Indonesia
This study tracked monthly variations in marine debris discharged from the Greater Jakarta area in Indonesia, identifying land-based sources including rivers and coastal communities as major contributors. Peak discharge events correlated with rainfall patterns, highlighting the importance of monsoon-season waste management in reducing ocean plastic pollution.
Influence of monsoon seasonality and tidal cycle on microplastics presence and distribution in the Upper Gulf of Thailand
Researchers surveyed microplastic pollution around Si Chang Island in the Gulf of Thailand across different monsoon seasons and found that seasonal weather patterns strongly influence microplastic abundance and distribution. Evidence suggests that UV exposure during dry seasons fragments plastic waste on land, which is then washed into the ocean by heavy rains during the wet season. The findings highlight how tropical climate cycles drive microplastic contamination in Southeast Asian coral reef areas.
Microplastic Accumulationin Hong Kong’s MarineSediment: Spatial Pattern and Potential Sources
Researchers conducted a comprehensive survey of microplastics in marine sediments across Hong Kong, finding uneven distribution with abundance ranging from near zero to high levels in urbanized areas. Source analysis pointed to household waste, fishing activity, and stormwater runoff as primary contributors.