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. 2019 Oct 24;9:15256. doi: 10.1038/s41598-019-51741-5

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(A) Depth specific abundances (per kg dry weight) for MP particles (20–500 µm) in one sediment core of the Roter Main River. Corresponding dry weights of the sub-samples are presented in the Supplementary Material (for color code see C). (B) Textural properties of the sediments extracted with the freeze core technique, classification according to Buffington and Montgomery³⁶ for hyporheic sediments. (C) Depth specific material (PE = polyethylene, PP = polypropylene, PS = polystyrene, PET = polyethylene therephthalat, PBT = polybutylene terephthalate, PC = polycarbonate, PAN = polyacrylonitrile, PVC = polyvinyl chloride) and shape composition for the detected particles. Figures 3 and 4 present data analyzed from the same freeze core.