@misc{Lewandowski_Krzysztof_Long-term_1991-1992,
 author={Lewandowski, Krzysztof},
 editor={Polska Akademia Nauk. Instytut Ekologii},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 howpublished={online},
 year={1991-1992},
 language={eng},
 abstract={In 1987, in the eutrophic Mikołajskie Lake the occurrence, numbers, biomass, age structure, size structure and growth of family Unionidae bivalves were determined and compared with the results of identical studies performed 15 years earlier. There were adverse changes in the Unionidae populations, related to an increase in lake eutrophication and pollution.},
 title={Long-term changes in the fauna of family Unionidae bivalves in the Mikołajskie Lake},
 type={Text},
 URL={http://rcin.org.pl/miiz/Content/83548/PDF/WA058_88180_P2840-T39_Eko-Pol-A-Nr-2.pdf},
 volume={39},
 number={2},
 journal={Ekologia Polska},
 publisher={Polish Scientific Publishers},
 keywords={lake, Unionidae bivalves, age structure, growth},
}