Nature conservation activists in the German state of Baden-Württemberg have taken unusual measures to save the local population of the European beaver. In response to increasing droughts that are drying up the streams that serve as habitats for these animals, ecologists have started building dams themselves. The aim is to raise the water level, provide beavers with suitable living conditions, and prevent their migration to agricultural areas, which often leads to conflicts with humans and culling. The initiative has received a mixed reception, but its creators emphasize that it is a stopgap measure in the face of climate change.
Intervention in the face of drought
Due to prolonged periods without rainfall in Baden-Württemberg, many smaller watercourses are drying up. This directly threatens beavers, which need a constant, sufficiently high water level in their lodges to survive. To address this situation, activists from pro-ecological organizations have undertaken to build dams and impound water in selected locations themselves.
Prevention of conflicts with farmers
The main goal of building dams by humans is to keep beavers in their natural areas. When streams dry up, the animals are forced to migrate in search of new habitats, often encroaching on farmland. There, by digging burrows in flood embankments or gnawing at trees, they cause damage that leads to conflicts with local farmers and often results in the issuance of a culling permit.
Controversy surrounding the method
The actions of the ecologists do not meet with unanimous approval. Some naturalists and foresters point out that interfering with natural processes is not a good long-term solution and may disrupt the local ecological balance. Critics argue that instead of building dams, efforts should focus on renaturing entire river valleys and restoring the landscape's natural water retention capacity.
The beaver as a returning species
The initiative takes place in the context of the successful reintroduction of the European beaver in Germany. This species, once nearly exterminated, has returned and spread to many areas thanks to strict protection since the 1970s. It is currently estimated that about 6,000 individuals live in Baden-Württemberg alone. The success of nature conservation, however, poses new challenges in the context of coexistence with humans.
In the German state of Baden-Württemberg, nature conservation activists have taken an unprecedented step by building dams on drying streams themselves. Their goal is to provide direct aid to the local, recovering population of the European beaver (European beaver), whose existence is threatened by increasingly frequent and severe droughts. When water levels in watercourses drop, the animals lose access to the underwater entrances to their burrows, forcing them to abandon their current habitats. The European beaver, once common throughout Europe, was almost completely exterminated by the end of the 19th century due to intensive hunting for its valuable fur, meat, and castoreum, a substance used in medicine and perfumery. The first attempts at protection were made as early as the 1920s, and systematic reintroduction in Germany and other Western European countries began on a larger scale in the second half of the 20th century, which is now considered one of the greatest species conservation successes on the continent. The ecologists' initiative is preventive in nature. The idea is to keep the beavers in their current refuges before they attempt to migrate. „When a beaver has no water, it goes looking for it. It often ends up in fields, where it starts digging burrows in drainage embankments or gnawing at trees in orchards,” explains one of the activists quoted by German media. Such behavior inevitably leads to conflicts with farmers, who can apply to local authorities for a permit to cull the pest. By building simple, wooden dams, the activists artificially raise the water level, creating substitute reservoirs for the beavers and thus drawing them away from areas of human activity. These actions are not without controversy, however. Some nature conservation experts criticize them as a short-sighted interference in natural processes. They point out that instead of temporary „improvements” to habitats, efforts should be made to restore the landscape's natural water retention capacity, for example through the renaturation of rivers and streams, the restoration of floodplains, and the planting of appropriate vegetation. „This is fighting the symptoms, not the cause,” comments one forester. The cause, however, is clear: climate change, which in southern Germany manifests itself in lengthening periods without precipitation and extreme heat, leading to faster evaporation. 6 000 — Estimated number of beavers in Baden-Württemberg The dispute touches on a broader dilemma of modern nature conservation: to what extent should we actively intervene to help species adapt to rapidly changing conditions, and to what extent should we allow natural selection to take its course? In the case of the beaver, which is a strictly protected species in Germany, and whose population in Baden-Württemberg is estimated at about 6,000 individuals, the pressure to find a solution is high. Local authorities, while understanding the ecologists' motivations, approach the matter with caution, emphasizing that any interference with the water system requires notification and should be carried out in consultation with experts. For the activists, however, time is of the essence. „We cannot wait for another beaver family to be shot because its pond dried up. We are acting here and now,” they say. Their makeshift dams are therefore not only a tool for protecting animals but also a visible symbol of the growing conflict between a warming climate, the needs of wildlife, and the interests of agricultural economy.