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Microplastics in Different Coastal Environmental Matrices and Potential Ecological Risks
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Scientists found tiny plastic particles (mostly fibers from things like clothing and fishing gear) scattered across coastal areas, with mangrove forests trapping the most—likely because their roots act like a net. Since these coastal zones connect to the seafood we eat and the water systems we rely on, understanding where microplastics build up helps researchers pinpoint pollution sources and predict where contamination risks are highest for both marine life and the food chain that eventually reaches our plates.
Microplastic pollution is an emerging environmental concern in coastal ecosystems, particularly in developing regions. However, research remains compartmentalized, limiting an integrated understanding of microplastic distribution, transport dynamics, and ecological risks across interconnected environmental matrices. In this study, a multi-matrix assessment was conducted to evaluate microplastic abundance, characteristics, and associated ecological risks. A total of 93 microplastic particles were identified, with the mangrove site exhibiting the highest concentration (200 items/kg), while the seagrass bed and estuary showed the lowest concentration (3.33 items/kg). The dominant microplastic type was primarily fiber (55.91%), with most particles ranging from 0.1 to 1 mm, and polypropylene (66.67%) was the predominant polymer type, reflecting the widespread contribution from plastic packaging and fishing gear. Significant correlations were observed between microplastic abundance and contamination factor (CF), pollution load index (PLI), and potential ecological risk index (PERI), whereas the polymer hazard index (PHI) showed no significant relationship due to its dependence on polymer composition. Non-metric multidimensional scaling (NMDS) revealed distinct distribution patterns of microplastic shape and polymer type across matrices. Overall, microplastic distribution across environmental matrices is driven by heterogeneous sources and transport pathways, with mangrove sediments enhancing retention, underscoring the need to elucidate seaward and landward source contribution and coastal fluxes.
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Accumulation of microplastics in mangrove ecosystem: source, properties, and impacts for conservation
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This review of studies from Asia, the Americas, and beyond found that mangrove forests—vital coastal ecosystems that trap carbon and protect shorelines—are accumulating tiny plastic particles from clothing fibers, fishing gear, and packaging waste. These microplastics are showing up in fish, crabs, and shellfish that people eat, raising concerns about how much plastic ends up on our dinner plates, while also potentially weakening the mangroves' ability to fight climate change. The findings suggest we need better tracking and stronger protections for these ecosystems, since plastic pollution may be harming both environmental health
Multidimensional Assessment of Microplastic Pollution in Mangrove Wetlands: Driving Mechanisms, Carbon Contribution, and Ecological Risk
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Scientists found tiny plastic particles called microplastics throughout mangrove wetlands in China, with the highest levels in areas used for fishing and fish farming. These plastic particles are building up in the sediment and water, creating pollution hotspots that pose moderate ecological risks to these important coastal ecosystems. This matters because mangroves help protect coastlines and support marine life that humans depend on for food, so plastic pollution in these areas could ultimately affect our food supply and coastal protection.
Characteristics and distribution of microplastics in the coastal mangrove sediments of China
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A survey of mangrove sediments along China's coast found microplastics were ubiquitous, with concentrations and polymer types varying by proximity to human activity and hydrological conditions. The study shows that mangrove forests, which provide critical coastal ecosystem services, are accumulating significant quantities of plastic pollution.
Impacts of Microplastics on Mangroves - A Review
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Mangrove forests act as natural traps for microplastics due to their dense root systems that slow water flow, leading to higher microplastic accumulation in mangroves than other coastal zones. This matters because the build-up harms mangrove plants at the cellular and physiological level, threatening these ecologically critical habitats that protect coastlines and support fisheries.
Preliminary Study on the Role of Mangroves in Entrapping Microplastics in Tuticorin Coast of Gulf of Mannar, Southeast Coast of India
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Researchers compared microplastic concentrations in mangrove sediments versus open-beach control sites along the coast of southern India and found consistently higher levels within mangrove areas. Polyethylene and polypropylene fibers in the 1–3 mm range were most common, and weathering analysis confirmed significant environmental degradation of the particles. The findings suggest that mangrove root systems act as natural traps for microplastics, which has implications for both ecosystem health and the many coastal communities that rely on mangroves for fisheries and shore protection.
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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.