Efekty ochrony rzadkich gatunków roślin na przykładzie zimoziołu północnego Linnaea borealis w rezerwacie Górki

The paper presents vegetation changes of Górki nature reserve in terms of their impact on the main subject of conservation – twinflower Linnaea borealis. The research was conducted between 1969 and 1974 and during this investigation a mixed forest Pino−Quercetum was noted. After 50 years of strict protection the studies were repeated to describe the reserve's flora and vegetation dynamics. A considerable decrease in number is particularly observed in species belonging to Vaccinio−Piceetea class. The main subject of conservation withdrew. Nowadays, vegetation evolved into an oak−hornbeam forest Tilio−Carpinetum betuli. Statistically relevant changes have also been noted as regards the soil acidity and the trophic status of the nature reserve's flora, based on ecological indicators.