Summary:

Peat-bog ecosystem, with their huge species wealth the very essential natural component. Preservation of plant community characteristic of raised bogs is very important because of protection of biological diversity of Orawsko-Nowotarska Basin.
The goal of the work was done estimation peat-forming process using the Canadian method described by Rochefort, Quinty and Campeau (1997).
The research has been legacy on the peat-bog Puścizna Długopole located in the Orawsko-Nowotarska basin. All of investigated peat-bog was intensively exploitation, as a result of him peat ecosystem to surrender considerably drying. It his lead to deterioration of plant covers on the examined territory. The proof of it is occurrence of the species characteristic for the class: Molinio-Arrhenatheretea, Nardo-callunetea, Epilobietea angustifolii, which they cause displacement of typical raised bogs species. The results of performed research have shown that the average degree of coverage by moss layer is 45,27%. Assessment of the peat-forming precess of peat-bog Puścizna Długopole shows that, on the bog dome, the peat-forming proces has to inhibit but not stopped yet. In this regard, there is an urgent need for their renaturization and legal protection.