Meiereisee und Kriegbuschwiesen Nature Reserve: An Atlas of Protected Landscapes in Brandenburg

The area that is now Meiereisee und Kriegbuschwiesen was not originally created as a single protected landscape but rather assembled from ecologically valuable parcels that had survived in the southern part of what is today the municipality of Krausnick-Groß Wasserburg. The lands include former floodplain meadows of the Spree river arms, inland dunes, and small lake-and-bog systems that had remained relatively intact while much of the surrounding countryside was converted to agriculture and forestry.

In 2000 the area received formal legal protection as the Naturschutzgebiet Meiereisee und Kriegbuschwiesen, consolidating its four constituent parcels into a single nationally recognized nature reserve under Brandenburg's nature conservation framework. The designation reflected both the local ecological value of the habitats and their broader significance within the Spreewald region, which itself was recognized as a UNESCO-designated biosphere reserve.

A further layer of protection came through the European Natura 2000 network, with the site registered under the identifier DE3949303 as a Fauna-Flora-Habitat (FFH) site. This means the reserve is simultaneously managed under German national nature conservation law and under the European Habitats Directive. A formal Managementplan for the FFH area, prepared by the Brandenburg Ministry for Rural Development, Environment and Agriculture and published in a short version in November 2019, set out concrete conservation objectives and measures, including habitat conversion for bat species and water-table management for the fen soils.

The landscape of the reserve is best understood as a small mosaic of four distinct physical settings. The northernmost parcel is dominated by the Meiereisee, a small dystrophic lake whose waters are dark, nutrient-rich, and slowly filling in through natural terrestrialization. Around its margins, reeds, sedges and bog vegetation are encroaching on the open water, producing a classic transitional mire in which the lake is gradually becoming peatland.

Just southwest of the Meiereisee lies a second, smaller water body, the Lichtesee, which sits in a kettle-like depression among the surrounding dunes. This kettle bog is mesotrophic to acidic and represents a different stage of mire development from the Meiereisee system: smaller in scale, more strongly acidic, and surrounded by mineral rather than organic substrates.

East of the lake and bog systems, the reserve climbs gently into low inland sand dunes. These dunes still carry traces of their open, grass-covered origins, and in places they remain bare or only sparsely vegetated, while elsewhere they have been colonized by Scots pine. Between the dunes and the mor hummocks grow pedunculate oak and hornbeam, lending these parts of the reserve a distinctly woodland character despite the underlying sandy and often dry substrate.

The southernmost parcel, the Kriegbuschwiesen, has a completely different character. This area was historically part of the active floodplain of the Spree and its branching channels. Although the river no longer regularly floods here, the soils still reflect that history, supporting a mix of low-intensity hay meadows on flatter ground, sedge-rich wet depressions of the former floodplain, and patches of dry sandy grassland (Sandtrockenrasen) on slightly elevated sandy rises. The result is a park-like open landscape of meadows, low thickets, and sandy clearings that contrasts sharply with the wooded dune country further north.

Ecologically, the reserve is unusual for the way it gathers a small set of habitats, each with its own characteristic flora and fauna, within a single protected area. The lake and transition mire of the Meiereisee support the hydrological and chemical conditions typical of a dystrophic system, with peat-forming vegetation dominating the margins and species adapted to low-pH, nutrient-rich water occurring both in the open water and the surrounding boggy margins.

The Lichtesee kettle bog adds a more strongly acidic and mineral-poor element, where mosses, sedges and bog plants typical of nutrient-poor mires can maintain themselves in a small basin surrounded by dunes. The dune slopes themselves support dry, often impoverished vegetation, ranging from open sand and dry grassland communities to dry pine forest and, in places, more species-rich oak and hornbeam stands.

The Kriegbuschwiesen form the most botanically diverse element of the reserve, because the management of the meadows as low-intensity hay meadows has allowed a mix of wet and dry grassland communities to persist side by side. Flat areas retain their character as nutrient-poor flatland meadows (magere Flachland-Mähwiesen), while slight depressions remain moist enough to support sedge-rich fen and floodplain communities, and sandy elevations carry fragments of dry sand grassland. This compression of contrasting grassland types within a few hundred meters is one of the principal ecological strengths of the site.

The fauna of Meiereisee und Kriegbuschwiesen reflects the unusually wide range of habitats within the reserve. Wetland and amphibian life is concentrated around the lake and bog systems. Both the moor frog and the small water frog are recorded as species of particular conservation concern and depend directly on the open water, boggy margins, and surrounding damp habitats of the northernmost parcels.

Reptiles find refuge in the dry, sun-exposed dune slopes and sandy grasslands, where the sand lizard and the smooth snake both occur. These two species are typical inhabitants of warm, dry sandy landscapes with open ground, scattered shrubs, and good basking sites, conditions that the inland dunes and Sandtrockenrasen within the reserve continue to provide.

Larger and more conspicuous species depend on the combination of open water, wet meadows, mature trees, and quiet forest patches that the reserve provides. The Eurasian otter uses the lakes, bogs, and connecting stream corridors as hunting grounds. The common crane breeds in or near the wetter portions of the reserve, while the white-tailed eagle, one of Europe's largest raptors, ranges across the forests, lakes and open meadows of the wider Spreewald landscape and is recorded as a fauna of particular concern within the site.

The site also has notable bat interest. The barbastelle bat is a focus of specific management measures, while Bechstein's bat has an unclear status in the reserve and the pond bat has not yet been confirmed within its boundaries. The presence of these species ties the reserve directly to ongoing conservation work on forest structure, since bat-friendly habitat requires older, tree-rich woodland rather than the conifer plantations that have historically dominated parts of the landscape.

Conservation at Meiereisee und Kriegbuschwiesen operates on two intersecting levels. At the European level, the site is an FFH area within the Natura 2000 network and is bound by the obligations of the EU Habitats Directive. At the national level, it is a Naturschutzgebiet under Brandenburg law, which gives its four component parcels the strongest available form of area protection in the German system.

The site's conservation priorities are set out in the Brandenburg Managementplan for the FFH area. A central measure is the conversion of existing conifer stands, where possible and appropriate, into mixed deciduous-coniferous forest, in order to improve habitat conditions for bat species such as the barbastelle, which depend on older, structurally diverse woodland rather than dense, single-age spruce plantations.

Equally important is water management. Because much of the reserve's value depends on the Meiereisee and the associated lowmoor soils, plans call for raising water levels where this can be done without harming other habitats, in order to secure the Niedermoor (lowmoor) soils and to maintain the hydrological conditions on which the bog vegetation depends. The dry meadows on higher ground within the reserve are deliberately excluded from these measures because their flora depends on the opposite condition: drier, nutrient-poor mineral soils.

A complementary measure addresses the impact of ungulates, particularly through plans to reduce deer populations in order to limit browsing damage to trees, particularly young trees and the regeneration of native broadleaf species. Taken together, these measures aim to stabilize the existing habitat mosaic while gradually shifting the more degraded forest stands toward a structure that better supports the protected fauna.

The reserve lies within a region with strong regional identity in eastern Germany. The Spreewald is one of the best-known cultural landscapes of Brandenburg, recognized internationally as a UNESCO Biosphere Reserve since 1991. Lowland forests, meadows, and the branching channels of the Spree river have shaped a distinctive local culture of small Sorbian-influenced villages, traditional Sorbian/Wendish vernacular architecture, and land-use practices that, while now heavily modernized, still leave their mark on the surrounding countryside.

Within this wider cultural setting, the reserve itself does not contain major historical monuments, but its component landscapes carry cultural memory in landscape form. The historical Forsthaus Meierei, a former forester's house near the northern parcels, marks the long-standing role of managed forestry in the area, and the Kriegbuschwiesen themselves reflect centuries of low-intensity meadow use on the floodplains of the Spree. Locally, the meadows have been part of the traditional hay-making economy that still characterizes the Spreewald in modified form.

The Meiereisee itself, a dystrophic, terrestrializing lake with surrounding transitional mire, is the single most distinctive landscape feature of the reserve and anchors its northernmost parcel. Close by, the acidic Lichtesee kettle bog offers a contrasting example of small-scale bog formation inside a dune landscape.

The inland dune belt, with its remnant open grasslands, dry sand communities, and pine- and oak-dominated forests, gives the reserve an unusual dry-warm element at the eastern side of the protected area that complements the wetter lake and bog complexes.

Further south, the Kriegbuschwiesen provide a comparatively open, park-like landscape of former Spree floodplain, with nutrient-poor hay meadows, sedge-rich wet depressions, and patches of dry sand grassland, and serve as the most important breeding and feeding habitat for crane, otter, and the suite of amphibians and reptiles that the reserve protects.

The reserve's landscapes and wildlife change in character across the year, and the experience of visiting depends heavily on the season. Late spring, from roughly May into early June, is a particularly rewarding period for visitors interested in flora and amphibians, when the meadows of the Kriegbuschwiesen are flowering, the mire vegetation around the Meiereisee is green and growing, and amphibians such as the moor frog and small water frog are most active in and around the pools.

Summer, especially from June through August, brings the full development of the wet meadows and dune grasslands, and is also the main period when the common crane's young are present in the landscape, while the reptiles of the dunes, including the sand lizard and smooth snake, are easiest to observe during warm, dry spells.

Outside these seasons, the reserve's character shifts considerably. Autumn emphasizes woodland colors, fruit set in the oak and hornbeam stands, and crane and raptor migration across the Spreewald landscape, while winter tends to mute both the meadows and the bog vegetation and shifts attention back to the open water and the more dramatic sight of grey herons, wintering waterfowl, and the occasional white-tailed eagle passing over. Visitors should remember that this is a working nature reserve under active conservation management rather than a developed visitor destination.