 The threat assessment was based on changes in the number and quality of the habitat type from the 1950s to the 2000s.According to the study, the main reasons for the threats to the habitat types were forestry, drainage for forestry (ditching), eutrophication of water bodies, clearing of agricultural land, and water engineering.Nature reserves, wilderness areas and hiking areas established on state-owned lands are the central parts of the protected area system in Finland.