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Data of Macrolitter accumulation in tidal marsh wrack deposits in a large estuary
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Researchers catalogued macrolitter found in tidal marsh wrack deposits across the Chesapeake Bay, documenting item types, sources, and provenance to support ongoing investigation into how plastic litter affects carbon cycling and blue carbon storage in coastal wetlands.
Data include variables on item types, uses, provenance, dates, and general and specific sources of macrolitter found in wrack deposits of tidal marshes in the Chesapeake Bay, USA. These data were collected between August and December 2025 in the postdoctoral project of Dr. Ostin Garcés Ordóñez titled “The hidden cost of plastic litter in coastal wetlands: impacts on carbon gas fluxes and blue carbon stocks in mangrove and salt marsh soils,” and were used in the research article “Macrolitter accumulation in tidal marsh wrack deposits in a large estuary,” published in Marine Pollution Bulletin (10.1016/j.marpolbul.2026.119848).
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Data of Macrolitter accumulation in tidal marsh wrack deposits in a large estuary
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Researchers catalogued macrolitter deposited in tidal marsh wrack zones across the Chesapeake Bay estuary, recording item types, sources, and provenance from fieldwork conducted August through December 2025 to support analysis of plastic litter impacts on coastal wetland carbon dynamics.
Chesapeake Bay Microplastics data
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Researchers collected raw microplastic and Raman spectroscopy data from two tidal marsh sites in the Chesapeake Bay, Virginia, providing a dataset for characterising microplastic occurrence and polymer composition in coastal wetland environments.
Chesapeake Bay Microplastics data
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Researchers collected raw microplastic and Raman spectroscopy data from two tidal marsh sites in the Chesapeake Bay, Virginia, providing a dataset for characterising microplastic occurrence and polymer composition in coastal wetland environments.
Macrolitter accumulation in tidal marsh wrack deposits in a large estuary
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Scientists studying the Chesapeake Bay found that marsh areas near cities are collecting huge amounts of plastic trash—mostly bottles and food packaging—washed in by tides, with the worst buildup happening close to population centers. This matters because these marshes are important coastal ecosystems, and as this trapped plastic breaks down over time, it likely releases microplastics into the water and food chain, meaning the fish and shellfish we eat could be absorbing pollution from poorly managed waste upstream.
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Researchers analyzed sediment cores from intertidal wetlands and estuaries in the Chesapeake Bay region to reconstruct microplastic concentration and composition trends since the early 20th century, finding that abundance closely tracks historical plastic production rates with shifts in polymer composition reflecting changes in industrial use.
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