Floating microplastics concentrations collected by citizen scientists in the coastal surface waters of the Northwestern Mediterranean Sea from 2020-10-09 to 2021-05-23 (NCEI Accession 0253923)
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title: Floating microplastics concentrations collected by citizen scientists in the coastal surface waters of the Northwestern Mediterranean Sea from 2020-10-09 to 2021-05-23 (NCEI Accession 0253923)
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Anchor: https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/5630 Anna Sanchez-Vidal
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abstract: This study estimated the floating microplastics concentrations load in the coastal surface waters of the Northwestern Mediterranean Sea. This dataset contains all 124 manta net trawl microplastics samples collected over 7 months by citizen scientists, in a spreadsheet format.
purpose: These microplastics data were collected in order to determine the concentrations of microplastics in the coastal surface waters of the Northwestern Mediterranean Sea.
credit: Related Funding Agency: Fundación Española para la Ciencia y la Tecnología (FECYT) Project FCT-19-14747
credit: Related Funding Agency: Ajuntament de Barcelona Grant 20S02426-00
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description: Parameter or Variable: MICROPLASTIC CONCENTRATION (measured); Units: pieces/m3; Observation Category: in situ; Sampling Instrument: Manta net; Sampling and Analyzing Method: Citizen scientists used a manta trawl that was attached to a paddle surf board or a kayak to acquire microplastics data. The trawl comprised the net, with a mesh size of 0.33 mm and a collector bag (i.e. cod end) at the end. The net dimensions used were 0.38 × 0.30 m. A Wikiloc Outdoor, S.L. free App installed in a smartphone was used for geolocation (i.e. latitude and longitude) while trawling. For every trawl, the citizen scientist entered the water with the trawl on the surf board or kayak, to which it was attached, and paddled/rowed to the beginning of the transect. Then the volunteer started paddling for about 1 h (between 1 and 2 km) following a consistent parallel transect to the coast when possible. After each trawl, the net was carried onboard before reaching back to shore and GPS recordings were interrupted. Once back to the beach, the paddle trawl was rinsed thoroughly with freshwater to ensure that all the plastic debris ended up into a replaceable collector bag, which was then sent directly back to the laboratory at the University of Barcelona. Once in the laboratory the collector bag was inverted, and all debris were washed out in a 0.33 mm sieve. Plastics were carefully extracted using standard stainless-steel tweezers under a stereo-microscope (10× to 50×) in a clean laboratory. For all collected samples, microplastics between 0.33 and 5.00 mm were captured with multi-staged 0.33 and 5.00 mm sieves. Microplastics were then dried at room temperature and placed separately on a 90 mm glass Petri dish to obtain plastic count. Each Petri dish containing plastic particles was scanned twice with a modified and color-calibrated HP G4050 flatbed scanner with a charge-coupled device sensor at high resolution (1200 dpi; 47.2 pixels mm−1).; Data Quality Method: A subset of 285 random-selected microplastics pieces (∼1.1% of the total) from two samples of each location were selected for polymer composition analysis confirmation using a Perkin Elmer Frontier FT-IR Spectrometer with a diamond crystal ATR accessory. Data on these random sample of 285 plastic pieces from two samples of each location are not included in this package..
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