Open Access

This article has an erratum: [erratum]

Fig. 1


Download original image

Study area. A − hydrological network (rivers and lakes), B − the Wieprz-Krzna Canal, C − national border, D − storage reservoir (R1, R2, R3), E − lake (D − the dystrophic Lake Moszne, M − the mesotrophic Lake Piaseczno, M/E − the meso-eutrophic Lake Skomielno, E − the eutrophic Lake Głębokie) for comparison.