In recent years a large number of environmental monitoring systems were developed. They are applied mainly for monitoring quality of air, water and soil in industrialised areas, i.e. so-called technological monitoring. Establishing new national parks and extending existing ones prompt naturalists to study unique spatial distribution of these areas and objective principles for their appraisal, and to launch regular investigation of their bioceonotic dynamics, i.e. biological monitoring. The author deals with practical utilization of such studies, focusing on vegetation. The Bieszczadzki National Park and Dolina Racławki reserve are taken as examples.