Estimations of plastic debris at Maracas Beach, north coast of Trinidad collected from 2015-09-27 to 2016-02-22 (NCEI Accession 0280519)

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This study estimated the amount of microplastics (i.e. plastics measuring less than 5 mm; reported in unit of pieces/m2), mesoplastics (i.e. plastics measuring 5-20 mm; reported in unit of counts/m2), macroplastics (i.e. plastics measuring 20-100 mm; reported in unit of counts/m2), and megaplastics (i.e. plastics measuring over 100 mm; reported in unit of counts/m2) in Maracas Beach, a micro-tidal recreational beach located on the north coast of Trinidad. These plastics were collected from 2015-09-27 to 2016-02-22 during multiple beach profile surveys. This dataset contains the results from all 18 beach surveys, in a spreadsheet format.

Microplastic concentrations in Mexican beaches from 2018-04-08 to 2018-07-17 (NCEI Accession 0278270)

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This study estimated the concentration of surface microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m2) in Mexican beaches from 2018-04-08 to 2018-07-17. Microplastic data were collected using a PVC cylinder. This dataset contains the results from all 330 beach sand samples, in a spreadsheet format.

Microplastic concentrations on beaches along the eastern Gulf of Thailand from 2019-04-11 to 2019-05-28 (NCEI Accession 0278059)

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This study estimated the concentration of microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/kg d.w.) on beaches along the eastern Gulf of Thailand from 2019-04-11 to 2019-05-28. Microplastic data were collected using a metal spoon. This dataset contains the results from all 34 sediment samples, in a spreadsheet format.

Microplastics concentration collected from four coastal areas of the Mediterranean Sea: Saronikos Gulf, Ligurian Sea, Gulf of Lion, and Gabes Gulf, from 2018-09-05 to 2019-11-20 (NCEI Accession 0270528)

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This study was carried out to estimate the microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m^3) concentration in four coastal areas of the Mediterranean Sea, namely, Saronikos Gulf, Ligurian Sea, Gulf of Lion, and Gabes Gulf. Microplastics data was collected from 2018-09-05 to 2019-11-20 using manta net. This dataset contains the results from all 71 surface net tows, in a spreadsheet format.

Microplastics concentrations in subtidal sediments from the Sado River estuary and the Arrábida marine park, Portugal collected from 2018-08-22 to 2019-02-27 (NCEI Accession 0279326)

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This study estimated the concentration of microplastics (i.e. plastics measuring less than 5mm; reported in unit of items/kg d.w) in subtidal sediments from the Sado River estuary and the Arrábida marine park, Portugal collected from 2018-08-22 to 2019-02-27. Microplastics were collected using a petite Ponar benthic grab. This dataset contains the results from all 36 sediment samples, in a spreadsheet format.

Microplastics concentration collected from SV Sea Dragon in the South Pacific subtropical gyre from 2011-03-28 to 2011-04-21 (NCEI Accession 0276017)

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This study was carried out to estimate the floating microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m^3) concentration in the South Pacific subtropical gyre. Microplastics data were collected with manta nets during an expedition that occurred between 2011-03-28 to 2011-04-21. This dataset contains the results from all 48 sampling stations, in a spreadsheet format.

Microplastics abundance in shoreline and seabed sediments collected in the Narragansett Bay, Rhode Island, USA, during 2020-09-25 to 2021-06-03 (NCEI Accession 0281206)

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This study estimated the concentration of microplastics (i.e. plastics measuring less than 5mm; reported in unit of items/kg d.w.) in shoreline and seabed sediments in the Narragansett Bay, Rhode Island, USA, during 2020-09-25 to 2021-06-03. Microplastics in the shoreline sediments were collected using a metal spoon while those in the seabed sediments were collected using a Van Veen grab sampler. Data on sediment dry weight (reported in unit of g) and individual counts of microplastic fibers, fragments and films are provided. This dataset contains the results from all 76 shoreline and 7 seabed sediment samples, in a spreadsheet format.

Microplastics concentration in deep sea sediments in the northeast Atlantic Ocean margins collected with an ROV aboard RV Celtic Explorer from 2019-08-03 to 2019-08-19 (NCEI Accession 0277496)

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This study was carried out to estimate the microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces kg-1 d.w.) concentration in deep sea sediments in the northeast Atlantic Ocean margins. Microplastics data was collected from 2019-08-03 to 2019-08-19 using a remotely operated vehicle aboard RV Celtic Explorer. This dataset contains the results from all 40 sampling efforts, in a spreadsheet format.

Surface microplastic concentrations in the Salento coastal seas (Southern Puglia, Italy) collected aboard R/V Pelagia from 2020-10-17 to 2021-06-28 (NCEI Accession 0277995)

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This study estimated the concentration of surface microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m3) in the Salento coastal seas (Southern Puglia, Italy) from 2020-10-17 to 2021-06-28. Microplastic data were collected aboard R/V Pelagia using a manta net. This dataset contains the results from all 18 surface water samples, in a spreadsheet format.

Microplastics concentration in surface waters along Manila Bay, Philippines from 2018-10-07 to 2019-02-11 (NCEI Accession 0271964)

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This study was carried out to estimate the microplastics (i.e. plastics measuring less than 5mm, reported in unit of pieces/m^3) concentration in surface waters along Manila Bay, Philippines from 2018-10-07 to 2019-02-11. A metallic bucket was used to collect water from 0 to 12 cm below the surface water. Water from the bucket was poured unto stacked stainless sieves with varying mesh sizes. Microplastics were identified and counted under a stereo microscope. This dataset contains the results from all 5 sampling stations, in a spreadsheet format.