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Consider a source: Microplastic in rivers is abundant, mobile, and selects for unique bacterial assemblages
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This Swedish Environmental Research Institute (IVL) report identified and ranked major sources and pathways of microplastic emissions in Sweden, synthesizing data from industries, transport infrastructure, consumer products, and wastewater. Road traffic-related tire wear and textile washing emerged as the largest national emission sources by mass.
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Microplastic is an Abundant and Distinct Microbial Habitat in an Urban River
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Researchers demonstrated that microplastic surfaces in an urban river host a microbial community that is distinct from surrounding water and sediment communities, establishing microplastic as an abundant and ecologically distinct habitat for river microorganisms.
Distinctive patterns of bacterial community succession in the riverine micro-plastisphere in view of biofilm development and ecological niches
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Scientists studied how bacterial communities develop on microplastics versus natural materials in river water and found that plastics support a distinct pattern of microbial colonization. The research identified specific bacteria capable of degrading microplastics and revealed that competition among microbes on plastic surfaces follows unexpected patterns compared to natural substrates.
Microplastic in surface waters of urban rivers: concentration, sources, and associated bacterial assemblages
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Researchers measured microplastic levels in the surface waters of the Chicago River and its urban tributaries, finding concentrations as high as 1.94 particles per cubic meter near wastewater outflows. They discovered that microplastic fibers and pellets were often colonized by bacterial communities distinct from those in the surrounding water. The study provides early evidence that urban rivers are significant conduits for microplastic pollution and that these particles may serve as rafts for microorganisms.
Stronger Geographic Limitations Shape a Rapid Turnover and Potentially Highly Connected Network of Core Bacteria on Microplastics
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Core bacterial communities on microplastics were investigated across river ecosystems, revealing that geographic factors strongly limited microbial sharing between sites and that plastic-associated microbiota turned over rapidly along river gradients. The findings suggest that microplastics in rivers carry largely location-specific bacterial assemblages rather than universally dispersed communities.
Uniqueness and Dependence of Bacterial Communities on Microplastics: Comparison with Water, Sediment, and Soil
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Researchers compared bacterial communities on microplastics with those in water, sediment, and soil in the Three Gorges Reservoir area, finding that microplastic-associated communities are unique in composition and ecological function compared to surrounding environments.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.