Fig. 2

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Area of the study. Abbreviations of study sites: the Oder River (O1-O3), the Gliwice Canal (KG1-KG11), the Kłodnica Canal (KK), the Kłodnica River (K1-K17), tributaries of the Kłodnica River (M-Młynówka Stream, Jo-Jordan Stream, PT-Toszecki Stream, D-Drama River, B-Bytomka River, C-Czerniawka River, PB-Bielszowicki Stream, P-Promna Stream, Ja-Jamna Stream, S-Ślepiotka Stream).
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