Deutsch: Bison bonasus / Español: Bison bonasus / Português: Bison bonasus / Français: Bison bonasus / Italiano: Bison bonasus

Bison bonasus, commonly known as the European bison or wisent, is a large herbivore native to Europe. In the context of the environment, Bison bonasus plays a crucial role in forest and grassland ecosystems, contributing to biodiversity and habitat maintenance. As a keystone species, its presence significantly influences the structure and function of the ecosystems it inhabits.


Bison bonasus is the largest terrestrial mammal in Europe, with males weighing up to 920 kilograms (2028 pounds) and standing about 1.8 to 2 meters at the shoulder. They have a robust build, with a thick, dark brown coat, a hump over the shoulders, and a short, broad head. Historically, European bison roamed across much of Europe, but their populations drastically declined due to hunting and habitat loss, leading to near extinction in the early 20th century.

The environmental impact of Bison bonasus is significant. These herbivores contribute to the maintenance of open forest landscapes and grasslands through their grazing habits. By feeding on a variety of plants, they prevent any single species from dominating, thus promoting plant diversity. Their grazing also helps control underbrush and supports the regeneration of certain plant species, creating a dynamic mosaic of habitats that benefit a wide range of other organisms.

Application Areas

Bison bonasus is relevant in various environmental contexts:

  • Forest and Grassland Management: European bison help maintain the health and diversity of forests and grasslands by their selective grazing and browsing.
  • Biodiversity Enhancement: Their presence supports a variety of plant and animal species, contributing to overall ecosystem biodiversity.
  • Ecological Research: As a reintroduced species in many areas, European bison are important for studying the effects of large herbivores on ecosystem dynamics.
  • Conservation Efforts: European bison are a focal species in many conservation programs aimed at restoring natural habitats and increasing biodiversity.

Well-Known Examples

Notable examples of Bison bonasus and their environmental significance include:

  • Białowieża Forest: Spanning Poland and Belarus, this UNESCO World Heritage site is home to a significant population of European bison, playing a vital role in the forest ecosystem.
  • Carpathian Mountains: Various reintroduction projects in the Carpathians have established bison herds that help maintain and restore mountain forest ecosystems.
  • Southern Bug Valley: In Ukraine, efforts to reintroduce European bison aim to enhance the biodiversity and ecological health of this unique landscape.

Treatment and Risks

Bison bonasus faces several environmental risks and management challenges:

  • Habitat Fragmentation: The fragmentation of natural habitats due to agriculture, urban development, and infrastructure poses a significant threat to bison populations.
  • Genetic Bottlenecks: The limited genetic diversity of European bison, resulting from their near extinction, makes them vulnerable to diseases and reduces their adaptive potential.
  • Human-Wildlife Conflict: As bison habitats overlap with agricultural areas, conflicts can arise, particularly involving crop damage.
  • Disease: Bison are susceptible to various diseases, such as bovine tuberculosis and foot-and-mouth disease, which can spread from domestic livestock.

Examples of Sentences

  1. The reintroduction of Bison bonasus to the Białowieża Forest has helped restore the ecological balance and enhance biodiversity in the area.
  2. Conservationists are monitoring Bison bonasus populations to prevent genetic bottlenecks and ensure long-term species viability.
  3. Bison bonasus grazing habits contribute to the maintenance of diverse plant communities in European grasslands and forests.

Similar Terms

  • Bison bison: The American bison, a related species with similar ecological roles in North America.
  • Bos taurus: Domestic cattle, which can impact ecosystems in ways that are both similar to and different from wild bison.
  • Cervus elaphus: The red deer, another large herbivore in Europe that influences forest and grassland ecosystems.


Bison bonasus, or the European bison, is a keystone species crucial to the health and diversity of forest and grassland ecosystems in Europe. Through their grazing and browsing habits, they promote plant diversity and habitat complexity. Despite facing threats from habitat fragmentation, genetic bottlenecks, and human-wildlife conflicts, conservation efforts are focused on restoring and protecting bison populations to ensure their continued ecological role.


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