A small lowland stream reserve in Lower Saxony protecting shaded brooks, wet forests, and fen landscapes along the Ilmenau.
Vierenbach Nature Reserve
Vierenbach is a nature reserve (Naturschutzgebiet) in Lower Saxony, Germany, focused on a small lowland stream and its surrounding wet valley between the Elbe-Seitenkanal and the municipality of Bienenbüttel in the Landkreis Uelzen. The protected area spans roughly 230 hectares of low-elevation terrain, between about 21 and 39 meters above sea level, and has been legally protected since 30 December 2004 under the designation NSG LÜ 268.
Ecologically, the reserve is shaped almost entirely by moisture. Alder and ash swamp forests, birch bog woodlands, and wet grassland on low moor dominate the valley floor, while the drier slopes of the surrounding Geest carry oak-hornbeam and mixed oak forests. Together with the adjacent Hartgenbeck lowland, the stream and its valley form part of the larger Ilmenau system and are included in the EU Natura 2000 network as the FFH site "Ilmenau mit Nebenbächen".
The reserve stands out as a representative example of a near-natural, shaded lowland brook ecosystem in the north German plain. It shelters characteristic species of small flowing waters such as the Eurasian otter, the bullhead, and the brook lamprey, and it preserves one of the quieter, less visited wetland corridors in the Lüneburg region.
