As of 1 April 2026, the PSJD database will become an archive and will no longer accept new data. Current publications from Polish scientific journals are available through the Library of Science: https://bibliotekanauki.pl
Fish community and productivity as an index of trophic state diversity in two Shallow lakes Struktura ichtiofauny i produktywność rybacka jako wskaźnik zróżnicowania troficznego dwóch płytkich jezior