@misc{Wojciechowska_Władysława_Long-term_1996,
 author={Wojciechowska, Władysława and Pęczuła, Wojciech and Zykubek, Andrzej},
 editor={Polska Akademia Nauk. Instytut Ekologii},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Dziekanów Leśny},
 howpublished={online},
 year={1996},
 language={eng},
 abstract={Analysis of chemical and biological research carried out in the Junes of 1968 and 1995 did not reveal changes in the trophic status of the majority of lakes over the 27-year period. The lack of significant changes in either physico-chemical parameters (SD, conductivity, pH, N-NO3, N-NO4, P-PO4, FeTot, Ca and Mg) or biological indices (chlorophyll-a concentration, structure and abundance of phytoplankton) allowed for the classification of the lakes into three groups: dystrophic (Lake Orchowe), moderately eutrophic (Lakes: Spólne, Pereszpa, Koseniec and Brudzieniec) and highly eutrophic (Lake Brudno). Only in Lake Płotycze was a change in status revealed – from moderately eutrophic to dystrophic. The findings allowed conclusions to be drawn regarding the effectiveness of the protection afforded the area to date.},
 type={Text},
 title={Long-term changes in protected lakes (Sobibór Landscape Park, Eastern Poland)},
 URL={http://www.rcin.org.pl/Content/86878/PDF/WA058_89663_P2840-T44_Eko-Pol-A-Nr-1-2.pdf},
 volume={44},
 number={1-2},
 journal={Ekologia Polska},
 publisher={Oficyna Wydawnicza Instytutu Ekologii PAN},
 keywords={eutrophication, lakes, phytoplankton, chlorophyll-a, chemical composition of water},
}