A change of the agricultural policy in Poland after 1990 caused significant changesin the structures of the agricultural landscape functioning in the area of WestPomerania (Pomorze Zachodnie). The field fragments, which had been in a form ofbarren land in the protective zone of Miedwie Lake for 30 years, were chosen forthe detailed phytosociological studies. The aim of the current study was theanalysis of anthropogenic impacts on flora in the surveyed terrain. In the studiedarea, the values of

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... he synanthropization indices of the flora were as follows:synanthropization - 2.58, apophytisation - 2.0, anthropophytisation - 0.56,archaeophytisation - 0.38, kenophytisation - 0.16, and fluctuation changes in theflora - 0.04. It is assumed that the larger the share of nonsynanthropic species, thelarger the naturalness of the flora inthese biotopes. The large values for theapophytisation index showed degradation in natural habitats A large share ofanthropophytes indicates dominance of the processes of a decline in native speciesin a given biotope, which means that there are disturbances of the ecologicalbalance of a given ecosystem. The 30 year cessation of agricultural use around thelake resulted in the improvement of the chemical state of waters. A significant rolein stopping water runoff played dense sodification of the surveyed area. The stateof the flora found in this area was influenced by both natural and anthropogenicfactors. This is proved by thedominance of synanthropic over nonsynanthropic, andspontaneophytes over anthropophytes species.