The Site includes four nature reserves: Gustavsmurarna, Brännan, Långhällskogen and Tröskens rikkärr. It contains wetland types which are representative of the European boreal region, including forested and non-forested peatlands, permanent freshwater lakes and springs. The Site supports many nationally red-listed species including populations of bog orchid Microstylis monophylla and fen orchid Liparis loeselii. Some rare beetles such as Chlaenius sulcicollis and Chlaenius quadrisulcatus can also be found. The Site is an important breeding area for bird species such as the crane Grus grus, the spotted crake Porzana porzana, the bittern Botaurus stellaris and the capercaillie Tetrao urogallus. Among the ecosystem services provided by the wetland are sediment trapping, water purification and carbon storage. The Site is mainly used for nature conservation, including research and monitoring, but hunting and outdoor activities are also permitted. Former land uses including intensive forestry, grazing and haymaking reduced the bush and tree vegetation, but since the declaration of the nature reserves and the implementation of the new regulations the reeds in the open fens have started to grow back.