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Small microplastics and other anthropogenic particles in the marine polar environment
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This study investigated zooplankton community composition in the Tietê River, São Paulo, in relation to plastic pollution and other contamination pressures. Microplastics were detected in zooplankton gut contents, and community diversity was reduced at the most contaminated river sections, suggesting pollution-driven assemblage shifts.
Le microplastiche (MP) e altri componenti del microlitter (MLC), tra cui fibre naturali e sintetiche, additivi plastici e altri contaminanti associati, rappresentano una preoccupazione crescente in ambienti remoti come l'Artico. A causa delle loro piccole dimensioni, della loro persistenza ed ampia distribuzione nei compartimenti abiotici, questi contaminanti possono entrare nella catena alimentare marina ed accumularsi nelle reti trofiche. I cambiamenti climatici stanno accelerando la fusione dei ghiacciai e l'apertura di nuove rotte marittime, aumentando il rilascio e il trasporto di MP e MLC. Questo studio stima la presenza, l'abbondanza e la composizione di MP e MLC nell'arcipelago delle Svalbard e nelle acque circostanti dell'Islanda, analizzando l'acqua di marina superficiale, i sedimenti, i piccoli invertebrati (anfipodi) e i tessuti dei mammiferi marini (balenottera comune). Particolare attenzione è stata dedicata alle microplastiche di piccole dimensioni (SMP; <100 μm) e al MLC, che rimangono sottostimati e poco studiati ma che comportano rischi ecologici più elevati. L'applicazione di protocolli analitici ad alta risoluzione ha consentito il rilevamento di queste frazioni in tutte le matrici, confermando una contaminazione diffusa. I risultati di questo studio evidenziano l'importanza del confronto tra matrici per valutare l'inquinamento da MP e MLC negli ecosistemi artici vulnerabili, in particolare delle SMP, confermate come le più abbondanti. Sottolineano inoltre l'urgente necessità di armonizzare le metodologie, di effettuare un monitoraggio a lungo termine e di includere le SMP e le MLC nei futuri quadri normativi.
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Small Microplastics: A yet Unknown Threat in the Svalbard (Norway) Region
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Researchers investigated the presence of small microplastics and nanoplastics in the Arctic Svalbard region, where climate change is accelerating ice melt and increasing shipping activity. Initial analyses of amphipods collected near Ny-Alesund confirmed the presence of small microplastics in Arctic marine organisms. The study outlines ongoing research efforts to understand how these tiny plastic particles move through polar food webs and affect both local ecosystems and human health.
Small microplastics and other components of microlitter in Arctic invertebrates (Amphipods)
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Researchers investigated small microplastics (less than 100 µm) and other microlitter components in Arctic amphipod invertebrates, addressing a gap in knowledge since most Arctic microplastics research has focused on particles larger than 100 µm. The study characterised the presence and composition of these smaller particles within this ecologically important invertebrate group.
Small microplastics and other components of microlitter in Arctic invertebrates (Amphipods)
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Researchers examined small microplastics (under 100 µm) and other microlitter components in Arctic amphipods, addressing the relatively understudied size fraction of microplastic contamination in marine invertebrates from polar regions. The study characterized particle types, sizes, and abundances found within these organisms to better understand contamination pathways in Arctic food webs.
Microlitter in arctic marine benthic food chains and potential effects on sediment dwelling fauna
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Researchers measured microlitter concentrations in arctic marine sediments and biota at Svalbard and Greenland, finding higher concentrations and greater diversity of plastic types near human settlements and sites of abandoned fishing gear. Laboratory experiments on an arctic amphipod showed physiological effects — including altered feeding rates and respiration — only at concentrations much higher than those currently found in the field.
Sea ice and a wastewater outlet identified as hotspots for anthropogenic microlitter in Svalbard waters
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Researchers identified Arctic sea ice and a wastewater outlet in Svalbard as hotspots for microplastic accumulation in Arctic waters. Sea ice acted as a temporary reservoir for plastic particles that were then released into the water column during melting, suggesting that Arctic ice could be an important, underappreciated source of microplastic contamination in polar seas.
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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.