The meadows are maintained by grazing livestock. The site is a popular visitor destination, and there is an ornithological station. Ramsar site no. 17. Pers fj rden . A freshwater lake formed when isostatic rise after deglaciation isolated a coastal bay from the sea.
Vegetation includes extensive reedbeds, deciduous woodland, and scrub.
The site supports various species of breeding and staging wetland birds. Vegetational succession will affect waterbird habitat. An entire catchment of virgin wilderness consisting of a wide range of habitats, including mountain slopes, open marshes, shallow freshwater lakes, Betula woodland, Picea and Pinus forests, and the largest mire in Europe outside the former Soviet Union. Landscape features include moraine ridges, fluvio-glacial channels, and tundra polygons. The rich communities of breeding birds include waterbirds and raptors.