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Abundance, Composition, and Potential Ecological Risks of Large Micro- and Mesoplastics in a Southern Italian Beach
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Researchers examined an Italian beach and found nearly 1,000 plastic fragments (ranging from grain-of-rice to bottle-cap sized) hiding in the sand, mostly common plastics like polyethylene and polypropylene, with patterns suggesting many likely came from industrial plastic pellets rather than random litter. While the study found these particular plastics have relatively low toxicity, the sheer volume matters because these fragments break down into smaller microplastics that can enter waterways, seafood, and eventually our bodies — highlighting the need for better controls on plastic pellet spills during manufacturing and shipping
This study provides a spatially resolved assessment of the abundance, composition, and ecological risk of large microplastics (LMPs, 1–5 mm) and mesoplastics (MSPs, 5–25 mm) in surface sediments at Lido Morelli Beach, southern Italy. Fifteen replicated sediment samples distributed across five shoreline-parallel transects were taken from the upper 5 cm of sediment within 0.25 m 2 quadrats, covering approximately 800 m 2 of beach surface. Plastic particles were visually sorted, size-classified, and chemically identified using ATR–FTIR spectroscopy. A total of 764 LMPs and 229 MSPs were collected, with maximum concentrations for both size classes occurring along storm berm transects. Polymer composition was dominated by polyethylene and polypropylene, and a strong positive correlation between LMP and MSP abundances ( R 2 = 0.86) indicated co-accumulation. Plastic pollution was assessed using four ecological indices. Pollution Load Index values >1 for both size classes and exceptionally high Pellet Pollution Index values suggest a probable pellet industrial source, while hazard-based indices (Hazard Index) indicated low polymer toxicity. The results provide actionable evidence for environmental regulators, port authorities, industrial pellet producers, and coastal management agencies, supporting targeted pellet-loss prevention, improved port and supply-chain controls, and monitoring strategies aligned with forthcoming EU regulations on the release of plastic pellets.
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Abundance and distribution of large microplastics (1–5 mm) within beach sediments at the Po River Delta, northeast Italy
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Researchers studied the distribution of large microplastics (1-5 mm) across three driftlines at beaches in the Po River Delta in northeast Italy, finding abundances of 2.92 to 23.30 microplastics per kilogram dry weight with no consistent accumulation pattern across driftlines.
Characterization of Large Microplastic Debris in Beach Sediments in the Po Delta Area
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Researchers characterized large microplastic debris in beach sediments of the Po Delta area in Italy, identifying prevalent polymer types and linking contamination to river transport from the heavily populated Po River basin.
Presence of micro-mesoplastics in beaches and sediments of São Francisco do Sul (Brazil)
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Researchers surveyed micro- and mesoplastics along beaches and sediments of São Francisco do Sul, Brazil, finding that sediment granulometry and local hydrodynamics were the primary controls on plastic retention, that mesoplastics serve as transitional reservoirs that fragment into secondary microplastics, and that polyethylene, polypropylene, and styrene-butadiene copolymers dominated the polymer composition.
Seasonal and Cross-Shore Assessment of Large and Small Microplastics Collected on the Ferrara Coast (Italy)
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A seasonal survey of the Ferrara coastline in northern Italy found large microplastics (averaging 5.66 per square meter) and far more abundant small microplastics (averaging 2,402 per square meter), with concentrations lowest in winter and highest accumulation at dune foot and crest positions. Polyethylene, polypropylene, and polyester dominated the larger particles, while small black fibers dominated the smaller fraction, likely from river and urban sources including plastic-processing industries near the Po River. This study contributes to understanding how microplastics distribute across beach profiles over time—useful for designing targeted cleanup interventions.
An evaluation of surface micro- and mesoplastic pollution in pelagic ecosystems of the Western Mediterranean Sea
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Researchers found that micro- and mesoplastic debris were widely and uniformly distributed across the Western Mediterranean Sea, with average surface concentrations of approximately 130,000 microplastic particles per km2 and 5,700 mesoplastic particles per km2. Fragment morphology and polymer composition analysis indicated a predominantly land-based origin for the debris.
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