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Mapping Microplastic Distribution in Mangrove Sediments as an Indicator of Coastal Ecosystem Health: A Reproducible Analytical Framework Integrating Density Separation and Computational Workflow
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Scientists studying mangrove forests in Indonesia found tiny plastic particles (mostly fibers and film-like fragments) buried in the mud, with the highest amounts near areas of human activity like towns or fishing spots. This matters because mangroves sit at the edge of land and sea, meaning these plastics can work their way into the fish and seafood that end up on our plates. The researchers also developed a more reliable, eco-friendlier method for detecting these plastics, which could help scientists worldwide track pollution more consistently.
Abstract—Microplastics (MPs) accumulation in mangrove sediments poses a persistent threat to coastal ecosystem integrity and trophic health. This study establishes a reproducible analytical workflow to map MP distribution, quantify density, and characterize morphotypes in mangrove sediments of Pantai Meras and Bitung, North Sulawesi, Indonesia. Sediment samples (n = 18) were collected via purposive sampling at six stations during spring low tide (0–3 cm depth, 1 kg dry weight per station). Extraction followed a standardized thermal drying (60◦C, 24 h), 0.5 mm mesh filtration, NaCl density flotation (≈ 1.20 g/cm3, 24 h), and H2O2 30% oxidative digestion protocol. Visual identification was performed using calibrated stereomicroscopy (Olympus SZ51) and digital imaging (Dino-Lite). Data were processed through a Python-Orange computational pipeline, and inter-station variability was assessed via one-way ANOVA. A total of 1,141 particles were recovered, yielding densities ranging from 13.55 to 85.35 particles/kg. Fiber (36.1%) and film (34.0%) dominated the morphological assemblage. ANOVA confirmed significant spatial heterogeneity (F = 7.318, p = 0.001181), with Station 3 (proximal to anthropogenic activity) exhibiting the highest accumulation. The study also introduces a patent-pending collagen-based bio-adhesive separation system (No. S00202412718) that enhances micro-scale recovery efficiency while reducing reliance on high-density chemical reagents. These findings establish a validated, open-science-compatible framework for coastal MP monitoring and underscore the role of mangrove sediments as persistent sinks for land-based plastic pollution. Index Terms—Microplastics, mangrove sediments, coastal ecosystem health, density separation, Python-Orange, spatial distribution, bio-adhesive extraction, environmental monitoring
More Papers Like This
Mapping Microplastic Distribution in Mangrove Sediments as an Indicator of Coastal Ecosystem Health: A Reproducible Analytical Framework Integrating Density Separation and Computational Workflow
AI summary Read the abstract
Scientists studying mangrove forests in Indonesia found tiny plastic bits—mostly fibers and film-like fragments—buried in the mud, with the highest amounts near areas of human activity like fishing or waste disposal. This matters because mangroves sit at the base of the coastal food chain, meaning these plastics can work their way into fish and seafood that people eventually eat. The researchers also created a more affordable, standardized method for detecting these plastics, which could help track pollution hotspots and guide cleanup efforts in coastal communities worldwide.
Microplastics in mangrove sediments of Northern Aceh, Indonesia: abundance, vertical distribution, characteristics, and their relationship with sediment grain size
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Scientists found tiny plastic bits (mostly common plastics like polyethylene and polypropylene) buried in mangrove mud in Indonesia, with the most contamination sitting in the top layer of sediment closest to the water and wildlife. Mangroves are nurseries for fish and shellfish, so plastic buildup here matters because these particles can enter the food chain and eventually end up on our plates, though this study focused on the sediment itself, not on direct human health effects.
Employing Density Separation to Characterise Microplastic Contamination in Coastal Wetland Ecosystems
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Scientists found that coastal wetlands like seagrass meadows, saltmarshes, and mangroves act as traps for microplastics, with mangroves collecting the most, mainly broken-down fragments from larger plastic debris washed in during storms. This matters because these wetlands are often called "nature's water filters," but if they're absorbing large amounts of plastic pollution, that plastic could work its way into marine food chains (and eventually onto our plates) while also potentially disrupting the health of these critical ecosystems that protect coastlines and support fisheries.
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.
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.
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