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Influence of Different Areal Pollu- tion Sources on Some Compounds Content in Water of Dejguny Lake
Authors: D. DOMSKA, M. RACZKOWSKI, K. STANKIEWICZ
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Distribution and Abundance of Pulsatilla Patens Popu- lations in Nature Reserves in North-Eastern Poland
Authors: B. JUŚKIEWICZ-SWACZYNA
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Zooplankton in the Nida River (The Upper Wkra River) Subjected to Revitalization Treatments
Authors: A. GOŹDZIEJEWSKA, A. SKRZYPCZAK, G. FURGAŁA-SELEZNIOW, J. KOSZAŁKA, A. MAMCARZ
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Ecological Status and Phytocoenotic Diversity of Macrophytes of Lake Szeląg Wielki (North – East Poland)
Authors: M. GRZYBOWSKI, J. SZAREK, K.A. SKIBNIEWSKA, J. GUZIUR