Open Access

This article has an erratum: [erratum]

Fig. 1

image

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.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.