Journal
MARINE POLLUTION BULLETIN
Volume 129, Issue 2, Pages 918-923Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.10.049
Keywords
Microplastics; Water column; Field sampling; Distribution; The Baltic Sea
Funding
- Russian Science Foundation (project MARBLE) [15-17-10020]
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Microlitter (0.5-5 mm) concentrations in water column (depth range from 0 to 217.5 m) of the main Baltic Proper basins are reported. In total, 95 water samples collected in 6 research cruises in 2015-2016 in the Bornholm, Gdansk, and Gotland basins were analysed. Water from 10- and 30-litre Niskin bathometers was filtered through the 174 mu m filters, and the filtrate was examined under optical microscope (40 x). The bulk mean concentration was 0.40 +/- 0.58 items per litre, with fibres making 77% of them. Other types of particles are the paint flakes (19%) and fragments (4%); no microbeads or pellets. The highest concentrations are found in the near-bottom samples from the coastal zone (2.2-2.7 items per litre max) and from near-surface waters (0.5 m) in the Bornholm basin (5 samples, 1.6-2.5 items per litre). Distribution of particles over depths, types, and geographical regions is presented.
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