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Environmental Information Center Comprehensive Foreign Affairs; Jiang Wei Compiler; Lin Dali Reviewer A five-year study by the University of Exeter in Devon found that beavers not only slowed flooding, but also reduced pollution, boosting populations of fish, amphibians and other wildlife, The Guardian reported. Increase. The UK government will use the study to decide whether to reintroduce wild beavers that were hunted to extinction more than 400 years ago. The study concluded that beavers provide significant benefits to wildlife and humans. Richard of Exeter University. The scientific team led by Professor Richard Brazier found that although beavers may cause some farmland to flood a little, their ecological benefits such as ecotourism and flood mitigation generally outweigh the disadvantages. The beavers escaped from captivity and were found living by the river in 2013.

There was a one-sided public opinion calling for the animals to be removed, but the government agreed to conduct a scientific experiment on the site, funded by the Devon Wildlife Foundation and its supporters. Populations Company banner design have grown from two pairs in 2015 to at least eight pairs today as beavers breed along tributaries such as the River Tale. A family of beavers built six dams upstream from the highly flood-prone village of East Budleigh. The dams slowed the flooding through the village, reducing "peak flow". The scientists also found that the beaver dams were able to filter out pollutants, including manure, mud and fertilizer from the river, while the new wetlands created with the dams took care of the water and river-dwelling birds, such as beavers and teals. The pools held up by the dams contained 37 percent more fish than other similar environments. Trout have also been recorded jumping over these dams when the river flow is high. While beaver dams can slow flood flow and prevent flooding, they can also lead to flooding of farmland between valleys.

But during the five years of the study, beaver dams caused problems in only five locations in the 250-square-kilometer catchment. In one case, a small-scale organic potato field was flooded by a beaver dam. Beaver gnawing also affects the growth of fruit trees by the river, and wire net protection must be installed. Most of these negative impacts can be addressed through active management. From time to time, the Devon Wildlife Trust and the landowner, Clinton Devon Estates, remove beaver dams or install beaver misdirection devices, which are pipes in beaver dams. Let the water flow through the dam without the beavers noticing to lower the water level and prevent flooding.