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Proportion of microplastics by shape (fiber, fragment and sphere) for A.
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Researchers documented the proportion of microplastics by morphological shape — fiber, fragment, and sphere — across 11 sites in the St. Lawrence River and Estuary using 300 µm and 100 µm mesh nets, comparing distributions from upstream to downstream. The dataset illustrates spatial variation in microplastic shape composition across fluvial and estuarine environments.
300 µm and B. 100 µm mesh size across all sites. Left to right: upstream to downstream; sites 1 to 11.
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Proportion of microplastics by polymer name for A.
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Researchers characterized the proportional composition of microplastics by polymer type across 11 sites in the St. Lawrence River and Estuary using two net mesh sizes (300 µm and 100 µm), sampling from upstream to downstream locations. This dataset reveals site-specific and mesh-size-dependent variation in the polymer makeup of surface water microplastics.
Distribution, abundance, and diversity of microplastics in the upper St. Lawrence River
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This study quantified the abundance, distribution, and diversity of microplastics in sediments of the St. Lawrence River, Canada, extending previous work on large polyethylene microbeads to a broader range of particle sizes and types. The results revealed widespread microplastic contamination across the river system, with urban areas showing the highest concentrations.
Percentage composition of microplastic shapes: A) sediment and B) water.
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This study presents compositional data on microplastic shapes found in sediment and water samples, characterizing the relative proportions of different morphological forms across two environmental matrices.
Microphotographs of microplastics found in the St. Lawrence River.
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Researchers documented diverse microplastic particle types collected from the St. Lawrence River using microphotography, identifying polyethylene fragments, polyolefin fragments, polystyrene beads, and polyethylene fibers in multiple colors from sites including Portneuf, Trois-Rivières, and Baie Saint-Paul. The images confirm the variety of polymer types and morphologies present across both fluvial and estuarine sampling locations.
From freshwaters to bivalves: Microplastic distribution along the Saint-Lawrence river-to-sea continuum
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Researchers traced microplastic distribution along the Saint-Lawrence River-to-sea continuum, finding both large and small microplastics in surface water and marine bivalves, with concentrations and polymer types varying between freshwater and estuarine 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.