Ulvedybet and Nibe Bredning. 02/09/77; Region Norjylland; 18,575 ha; 57°02'N 009°35'E. NATURA 2000 (SAC,SPA) ; Nature Conservation Area, Wildlife Reserves. A shallow fjord surrounded by marshes and reedbeds, including open water, islets, mudflats, saltmarsh, small lakes and agricultural land. It is internationally important for wintering and staging various species of waterbirds and supports more than 1% of the biogeographic populations of Whooper and Bewick's Swans and Light-bellied Brent Goose (Branta bernicla hrota). Nutrient loading and resulting eutrophication of the aquatic environment have caused a major collapse and 90% reduction of the surface area of the submerged Zostera marina beds in Nibe and Gjol Bredninger, and this has been followed by notable reductions in numbers of Mute Swans (Cygnus olor), Eurasian Wigeon (Anas penelope), and Eurasian Coot (Fulica atra). Management plans have been issued in 2011 by the Danish Ministry of the Environment setting up site-specific nature goal and priorities to improve water quality and the ecological status of wetland catchments and coastal areas. Ramsar site no. 146. Most recent RIS information: 2012.