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. 2020 Jul 6;10:11087. doi: 10.1038/s41598-020-66519-3

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© The Author(s) 2020

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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Scatter plots of sampling sites in two-dimensional NMDS space. (a) parameters describing biological processes are treated as explained variables, hydrochemical parameters are treated as explanatory ones, (b) hydrochemical parameters are explained, biological parameters are explanatory. Red — eastern coast, blue — western coast; green circles represent pelagic samples; circles — samples taken from the lake near river mouths, squares — river mouths; dashed blue squares are samples taken near the mouth of Bolshaya Cheremshanka river; dashed red pointers are samples taken near Bolshaya Osinovka and Malaya Osinovka rivers; w — water samples, i — ice samples. Plots show only the vectors of gradient for explanatory variables significantly affecting the datasets of explained variables (Tables 1 and 2).