A Brandenburg river-valley protected area combining the Dahme waterway with heathland, dunes, and wetland forests.
Streganzsee-Dahme
Streganzsee-Dahme is a designated nature reserve (Naturschutzgebiet) in the south of Brandenburg, Germany, administered jointly across the municipality of Heidesee and the town of Märkisch Buchholz in the district of Dahme-Spreewald. The protected area follows the middle course of the Dahme River, a tributary of the Spree, and incorporates the southern portion of Streganzer See. Its combination of a flowing lowland river valley with heathland, dunes, mires, and wetland forests gives the area a distinctive mosaic character within the broader Dahme-Heideseen Nature Park.
Ecologically, the reserve plays a meaningful role in the European Natura 2000 network as a designated Fauna-Flora-Habitat (FFH) site. It protects habitat types such as Molinia meadows, transition mires, riparian alder-ash forests, lichen-rich pine forests on inland dunes, and heaths with bell heather and broom. It also provides refuge for Annex II species including the European beaver, Eurasian otter, fire-bellied toad, and northern crested newt.
The reserve is significant at a regional level because it preserves a relatively intact example of a Brandenburg lowland river corridor with its associated sandland and mire complexes. Its position within the larger Dahme-Heideseen Nature Park ties it into a wider network of conservation areas in eastern Brandenburg.
