Background Brown moss fens were once common in Brandenburg, however, near-natural base-rich or calcareous percolation mires and spring mires have now virtually vanished because of drainage. Only three near-natural base-rich fens of lacustrine origin (terrestrialisation mires) still exist. Furthermore, there are many moderately degraded fens that are in need of restoration. Objectives The project will help to stop the rapid loss of “base-rich to alkaline fens” (brown moss fens) in the German federal state of Brandenburg and contribute to the restoration, development and improvement of near-natural lowland-brown moss fens. Alkaline fens appear in all 14 project sites, covering two SPAs and 12 SCIs. The project will develop, restore and extend the largest viable brown moss fen surface areas in Brandenburg The ongoing loss of habitat area will be stopped, and hopefully reversed. Public awareness-raising about fen conservation measures will feature prominently during the project. Expected results: Restoration of suitable conditions for the regeneration of tree-less alkaline fens at locations with degraded percolation, as well as on spring mire sites with a good restoration potential; Establishment of management practises to stabilise residual alkaline fens of lacustrine origin; Reintroduction of the natural vegetation structure and diversity of alkaline fens on disturbed sites; Conservation and improvement of Natura 2000-habitat types (bogs and wet forest) that are connected to brown moss fens; Population stabilisation or re-introduction of threatened or locally extinct plant species that are typical of alkaline fens in Brandenburg; Reduction of the decomposition of peat through by water-logging; and Evaluation of the effectiveness of the restoration methods used.